TM-2030 User`s Manual9-1
Contents
1. P13 Battery Low setpoint This allows you to set the level at which the low voltage battery reminders will flash It also sets the audible low battery alarm as described in section P9 above Set the value in volts that need to be attained for the B Lo reminder to light or audible alarm to sound Also see P9 and P13 on previous page P17 Time of Recording for Daily history data This shows the number of hours that will elapse before the daily H7 H8 and H9 logged data will be recorded So if the actual time is 10PM and you want the day s data to be recorded at 1AM enter 3 hours here P18 Voltage calibration This is the voltage calibration adjustment if the voltage shown is not exactly correct This calibration is stable and should not ever be necessary to adjust but if you find you need or want to follow these steps 1 Get a multimeter that you know to be accurate Carefully remove the TriMetric panel from its box to gain access to the back of the unit With the multimeter measure volts between the G1 and terminals that are on the back of the TriMetric circuit board While doing this you must be connected to a voltage source that is stable At the factory for best accuracy we use a voltage exactly between two 1 10 volt readings we use 29 95 volts and follow the procedure below until we get to 29 9 on the meter 2 Switch to the P18 Program and put it in the program mode 32. Liquid electrolyte to set this voltage it is useful for you to know this actual voltage number since you now own a TriMetric to check that the charger is really charging correctly If all chargers are not set correctly you may be buying replacement batteries before you expected Battery temperature If the battery temperature varies considerably the charging source should adjust its voltage to temperature A well designed charger will have a temperature sensor and adjust its voltage a little higher at cold and lower at warmer temperatures As mentioned above the absorption charging voltage is usually given for a battery at 25 C 77 F You can use the TriMetric to determine what your charger is adjusted to by watching Volts as the charger is charging the batteries and eventually you should find that the voltage does not rise any more as the batteries approach full charge An easier way which doesn t require that you constantly monitor the meter is to use the History data see Section 4 item H7 and H8 Charging for sufficient time Not only must the voltage be high enough but it is the nature of battery chemistry requires the passage of some time at the absorption voltage to fully charge So this means not only adjusting the voltage correctly as mentioned above but charging for enough time to get the battery well charged There are three ways commonly used to measure this 1 charge at absorption voltage for a set
3. SC 2030 Solar Charge Controller User s Manual section 6 5 2 When the above occurs the TriMetric then declares the battery charged by flashing the charging light and resets the Days since charged to 0 3 When the charging is completed and the batteries start to discharge again the Amp hours from full display is reset to 0 00 and Battery Full is reset to 100 This assumes that the auto reset is on Program P12 which is always the case in Level L1 or L2 It may be turned off if desired in Level L3 4 As the battery discharges the TriMetric amp hours from full gradually go negative at a rate depending on the number of amps and go positive when charging For example if the batteries are discharging with amps minus 10 0 the amp hours from full display gradually decreases by exactly 10 0 for every hour that goes by Similarly when amps are positive 10 amps charging the amp hours from full display gradually increases by almost 10 amps for every hour The almost has to do with charge efficiency factor which can be adjusted by program P10 If the efficiency factor is set to 100 the amp hours will go up by exactly 10 per hour however if the efficiency factor is 94 the amp hours from full display goes up by only 94 of 10 or 9 4 amp hours for every hour The purpose of this is to account for the fact that you don t get as many amp hours out of the battery as you put in so that the Tr
4. for entire last discharge charge cycle H5 1 5 5 5 For last 5 charge discharge cycles Lowest Full value during each cycle H6 1 6 5 5 For last 5 charge discharge cycles Lowest battery voltage for each cycle H7 1 7 5 5 For last 5 days Highest battery B1 voltage attained for each day H8 1 8 5 5 For last 5 days If highest voltage H7 was less than charged voltage setpoint P1 then this shows amps value while voltage was highest If highest voltage H7 exceeded charged voltage setpoint P1 then this shows the lowest amps value during time that voltage was above setpoint Purpose To show how close it got to voltage amp charged setpoints H9 1 9 5 5 For last 5 days for each day shows charge percent that was replaced on that day compared to the previous lowest discharge TABLE 1 See section 6 3 for more discussion of these A charge discharge cycle refers to the time beginning from a fully charged battery followed by partial discharge to less than 98 and ending when charging it back up to charged again Data is displayed only when discharge again goes below 98 5 Summar y of Pr ogr amming instructions Program functions applicable for Operating Level L1 are summarized in Table 2 below As mentioned above it is most important that items P1 P2 and P3 below in Table 1 be correctly programmed for the Battery Full data to be correct A step by step procedure for doing this is described
5. 24 hour period that ends at a time of day or night that you can determine by referring to Program 17 on page 13 Purpose of H7 H8 data The way that the TriMetric determines that the batteries are charged in Level 1 2 and 3 operation is to sense that the battery volts exceeded the programmed P1 value and the charging Amps are less than the value of P2 times P3 P2 is expressed as a percentage The H7 and H8 history data track these values so you can see during each 24 hour period how high the volts actually got and how low the Amps got so if these values were not achieved you can understand why The H7 data shows the maximum voltage the batteries were charged on that day The H8 data shows the minimum amps that were attained when the voltage was near that maximum Filtered values of volts and amps are recorded as defined in section 6 2 5 The meter in Level 1 2 or 3 will only indicate charged on days when the H7 maximum volts data is equal or greater than the P1 program data and the H8 minimum amps data is less than the product of P2 percent times P3 so the H7 H8 data allow you to discover how close these values got on each of the last 5 days Purpose of H9 data When the meter is in Level 4 operation in addition to the above to sense charged it also requires that the returned percentage of charge exceeds the P20 value That is what the H9 History data tracks Also use the H7 maximum daily voltage dat
6. data on Battery full and days since charged 1 Overview of TM 2030 RV and TM 2030 A battery system monitor The TM 2030 is intended to keep you informed about 12V to 48V battery systems such as ones found in RV s or off grid homes which are regularly charged and discharged and use deep cycle batteries The TM2030 may also be used with the new optional Bogart Engineering SC 2030 30 amp solar charger These two will together allow both flexible and accurate solar charging and comprehensive monitoring of batteries How the TM 2030 can be useful to you The amps or watts display measures the rate of energy going in or out of your batteries so you can check your charging systems and also to see how much energy each of your appliances use to help you conserve energy The Full display is the most accurate way to keep track of how charged or discharged your batteries are until battery volts gets really low When battery volts goes below 11 5 volts for 12 volt systems the volts display can warn that you are near discharge The volts display also lets you discover if your charger is charging to an optimum voltage also see data logging below which is important for maximizing your battery life The days since charged display shows how recently the main battery system was fully charged so if it hasn t been charged recently you can perform extra charging if necessary to help maintain the capaci
7. full charge which you set using Program P5 Once you fully charge them the flashing reminder will cease See Section 2 2 1 Also the days since charged display on the secondary displays page 3 will tell you how long it has been since they have been fully charged Equalization refers to a process of occasionally overcharging your batteries which is usually recommended by manufacturers of wet cell lead acid batteries but however is usually not recommended for AGM OR GEL sealed lead acid batteries and overdoing it can damage these types More recently some companies making AGM batteries occasionally recommend this Example Concorde Battery Co The Trojan battery company recommends that their wet cell batteries be equalized every 1 2 months This helps to completely recharge the battery which helps maintain the battery capacity Some charge controllers or battery chargers have an equalize mode which is controlled either manually or automatically The SC 2030 now has the capability to do a manual equalization when controlled by the TM 2030 This TriMetric function is intended for use primarily for systems that require manual equalization and reminds you to perform this after the programmed time Placing the charger in equalize mode involves extra charging after the batteries have reached the charged criteria which allows the voltage to rise extra high for a period of time for example the Trojan Battery Co recommends char
8. lights flashing Observe correct value on the multimeter then push and hold RESET down until voltage on the TriMetric display jumps higher than the multimeter reading Release RESET Then successively push RESET with many short pushes to gradually bring the voltage down until it is agrees with your multimeter At 12 05 volts it takes about eleven pushes to bring it down by just 1 10 volt It will go down faster with a higher battery voltage When correct push SELECT to finish P19 Program factory values This reinstalls all the default factory values in all the program locations at once so will erase any data you have put in Hold down the RESET button for several seconds until this occurs 7 Important information about battery charging to keep from killing your batteries Even if you abuse your batteries they will probably work just fine for awhile By knowing how to care for them you can extend their life to maximize their return to you 1 Charging to correct voltage Charging for sufficient time Charging at frequent intervals 2 Not often letting them become totally discharged or left very long in a discharged condition 3 For liquid electrolyte batteries maintaining the water level always above the internal plates The most important thing to maintain your batteries is to charge them to correct voltage and current and often We will try to define both The most common battery crime for wh
9. since charged Timer for days since Equalized Also data logging history data described below Secondary Battery B2 sharing common negative with main battery Measures volts only Battery Volts From 10 0 65 0 volts for main battery From 0 0 to 100 volts on secondary battery Resolution 0 1 volt Accuracy 0 3 Amps charging or discharging With 500A 50mV shunt 00 0 to 999 Amps resolution 0 1A With 100A 100mV shunt 0 00 300 Amps resolution 0 01 Amp 1 least significant digit Note Maximum amps is often limited by the shunt capability maximum current for a typical 500A 50mV shunt is about 400A For a 100A 100mV shunt about 70 Amps Depending on shunt design and ambient temperature Watts 20 000 Watts With 500A shunt when Amps read greater than 10 0 Watts accuracy 1 5 least significant digit When Amps value is lower watts accuracy depends on amps resolution accuracy Amp hours Measurement accuracy 0 00 to 80 000 Amp hours to same accuracy as amps Battery Full Measurement accuracy 1 Also measures overcharge Typical system accuracy if batteries are charged full at least every 5 days typical 5 With efficiency set to suggested 94 the Battery Full Display will be conservative i e display a little lower than actual Meter Power requirement About 30 mA when display is on and about 16mA when display turned off Efficiency factor adjustable 60 100 Battery capacity settable 10
10. your chargers and charge controllers must be set according to information from the battery manufacturer Once those are set the TriMetric voltage setpoint should be 1 or so lower than the charger settings If this is done the TriMetric charging lamp will begin to flash as indicated on the top charging lamp on the panel some time before the charging system decides that the batteries are charged and stops charging your batteries If you have two or 11 more chargers such as solar and generator both chargers would normally be set to charge to the same voltage and the TriMetric should be set with the voltage low enough for either one to reach when the batteries approach full charge Choosing the charged setpoint percentage amps IMPORTANT New for the TM 2030 enter this percentage directly into program P2 from 1 0 to 10 0 The method of setting this has been changed from the older TM 2020 or TM 2025 If you have a generator or other charger that has high charging current capability it becomes important to also set the charged setpoint amps in the TriMetric This is because a high current charging source can force the battery voltage to rise and meet the charged voltage setpoint even though the batteries are not yet well charged With such a charger once the voltage reaches its maximum bulk voltage the charging current amps will start out high then gradually reduce as the batteries become more charged Proper adjustmen
11. B0269 instructions TM2030 USER S INSTRUCTIONS FOR TRI METRIC Battery system monitors Model TM 2030 RV and TM 2030 A INSTALLERS See separate TriMetric TM 2030 installation instructions revised September 1 2015 Later revisions will appear on our web site Essential information for users read pages 2 4 1 Overview of TM 2030 RV or TM2030 A battery system monitor 2 Basic instructions for Operating Level L1 2 1 More details on the five less used display items 2 2 What are Battery Reminders 2 3 Who might want to use operational level L2 L3 or L4 Additional information and reference 3 Beyond Beginners Instructions for Operating Levels L2 L3 L4 4 History Data Available with the TM 2030 5 Summary of Programming instructions 6 Reference section 6 1 Warranty and Specifications 6 2 How the TriMetric keeps track of Battery full 6 3 What History data can tell you about your system 6 4 Further description of each programming function Bonus information on battery care 7 Important information on how to keep from killing your batteries BOGART ENGINEERING Inc 19020 Two Bar Road Boulder Creek CA 95006 831 338 0616 www bogartengineering com IMPORTANT Be sure that the installer of this meter has installed the two required parameters P1 and P3 into this meter suitable for your batteries as described in Installation instructions for TriMetric TM 2030 section C1 otherwise this meter will not give correct
12. a to verify that the charge controller or chargers are charging to correct absorb voltage verify that sufficient charging is taken place during that day to reach the absorb voltage Also use the H8 maximum daily voltage data to verify that enough charging time occurred to reduce the amps to a satisfactory low value Also use H9 to see how much daily overcharge in percent was achieved verify that sufficient overcharge took place that day compared with the most recent low charge point has been during the day According to many battery experts properly charged liquid electrolyte lead acid batteries should be charged with 110 120 more than the low level to which were just previously discharged to ensure they will not gradually lose capacity AGM batteries should be charged to 104 109 of previous discharge eTechnical note The value recorded for the H8 minimum current data depends on whether the voltage on that day exceeded the charged voltage setpoint programmed in program P1 If the H7 maximum filtered voltage on a particular day is less than the charged voltage setpoint Then the amps value for that day is the filtered amps value at the moment that the maximum voltage occurred If the H7 maximum filtered voltage on a particular day is greater than the charged voltage setpoint Then the amps value is the minimum filtered amps during the time that the volts exceeded the setpoint 6 4 Further description of each prog
13. ain 4 When satisfied with the programmable data push SELECT to get back into OBSERVE mode Now either continue programming as described in step 2 or to get back to regular displays push SELECT repeatedly PROGRAM PROGRAMMABLE DATA Factory WHAT IT IS FOR SUMMARY MODE and ADJUSTMENT RANGE value For more information see Section 6 4 NUMBER Your Used by value SC 2030 charger P1 Charged setpoint voltage The TriMetric determines that battery is charged when 10 0 to 65 0 volts actual volts is greater than setpoint voltage and amps is q T T a less than setpoint amps When this is true the charging He Charged setpoint amps multiplier in lamp flashes to indicate a full battery This resets amp 0 1 to 10 percent of the value of battery hours from full to 0 and battery full to 100 and the capacity P3 If P2 value is 02 0 and P3 400 Days since charged to 0 Details see section 6 2 setpoint amps 2 of 400 8 amps Battery capacity amp hours Enter the battery capacity in amp hours This setting 10 to 10 000 amp hours Note flashing decimal influences only the Battery full display numbers and point means multiply number by 1000 so 1 02 uses this information to display this value correctly for means 1020 amp hours your batteries Also see section 6 2 WATTS or AMPS choice Chooses whether AMPS or WATTS shows up on the Pr WATTS Power A Amps Primary display ju
14. ained in detail at the top of page 16 There are 9 types of data recorded as History data These are labeled H1 through H9 1 Use program P7 to put meter in complexity level 2 3 or 4 1 Get to history data by holding SELECT down until you see H1 1 come into display 2 Push SELECT button to advance to each of 9 types of data 3 For each data item except for item 1 1 push RESET to go back in time up to 5 days or 5 cycles H1 1 Battery Odometer Cumulative Lifetime Battery discharging Amp hours Analogous to an odometer in a car Displays how many amp hours you got from the battery system over its lifetime This number starts at 0 when manually reset which would usually be at the time of initial installation of the batteries See reference to RESET button in figure 1 for how to do this Whenever the value of amps is negative charge is leaving the battery the display counts amp hours down It does not record when battery is charging amps is positive It is analogous to a car odometer trather than miles travelled it shows how much total energy the batteries have delivered Evaluate performance of the batteries and the level of care which they received In case of power interruption to the meter you will only lose a maximum of 3 hours of this data because this data is automatically stored to non volatile memory every 3 hours This number can be displayed to 999 000 amp hours which is longer than most battery sets
15. arging always decreases amp hrs at 100 rate When charging increases amp hours at this specified percent rate Also see section 6 2 step 4 Shunt type Sh H 500A 50mV shunt Sh L 100A 100mV shunt Automatic reset ON OFF Battery low volts alarm 10 0 65 0 volts Shunt type for correct Amps and amp hour values Also see section 6 4 P11 When ON Batt full reset to 100 and Amp hrs reset to 0 when Charge criteria are met Pl P2 Also see section 6 2 Step 3 and section 6 4 P12 When volts is at or lower than this value b LO flashes occasionally in display as battery reminder Also audible alarm occurs when P9 is not OFF Also see section 2 2 3 and section 6 4 P13 For SC 2030 Charger sets maximum time allowed to be in absorb before float 0 0 25 0 hours For exact description see charging profile graphs near page 14 of SC 2030 Solar Charge Controller User s Manual See section 6 2 step 4 and section 6 4 P14 For SC 2030 charger Max voltage allowed during finish charge stage 10 0 65 0 volts Used only by SC 2030 charger See SC 2030 instructions For SC 2030 charger Float voltage 10 0 65 0 volts Time before daily maximum measurement will be recorded 0 23 hours Used only by SC 2030 charger See SC 2030 instructions For history data H7 H8 and H9 only Adjust this to number of hours after present time that daily measur
16. attery should be recharged Ch F or battery should be equalized Ch E BATTER or battery voltage low b LO REMINDERS O See section 2 2 for details DO YOU PREFER AMPS OR WATTS to show in primary display See Table 2 Program P4 to change TO ACCESS PRIMARY MOST OFTEN USED DISPLAYS Push SELECT quickly to make display toggle through VOLTS first battery B2 then battery B1 AMPS or WATTS entering or leaving battery B1 Hold SELECT 3 seconds to view FULL for battery 1 Battery B1 must be charged fully at least once before this will display AH awP HOURS FROM FULL SL DAYS SINCE CHARGED TO ACCESS SECONDARY LESS OFTEN USED DISPLAYS ere ena hte f QP ms o aas Push and hold SELECT for 3 seconds until AH pops into display Immediately release SELECT You will see Operating and programming instructions at O www bogartengifeering com ins AH Amp hours discharged from a full battery Push SELECT quickly to toggle through dSC Number of days since the batteries have been fully charged dSE Number of days since the batteries have been equalized if used AP or Pr Shows amps or watts entering leaving the batteries Amps AP or Watts Pr Which one see P4 table 2 page 7 rPC Shows how much energy you ve replaced of the last discharge See Section 2 1 for more details on these 5 items The RESET button will reset any o
17. ccess to some history information see below intended to help technicians in analyzing systems to see that they are operating properly Section 4 has a brief description Section 6 3 has more details Level L3 and L4 have all functions of L2 and also adds additional programming functions summarized in Table 3 and detailed in section 2 3 and 6 4 Also Level L3 and L4 allow you to observe the filtered values of Volts B1 or Amps which are extremely sluggish versions of these items by pushing and holding the RESET button while viewing VoltsB1 or Amps The meaning of the filtered values is described in section 6 2 step 5 The difference between L3 and L4 is that the L4 level raises the requirement for a charged battery beyond the usual volts amps requirement see Section 6 2 of these instructions The additional requirement is that the battery must meet the float requirement defined for the SC 2030 charger described in SC 2030 Solar Charge Controller User s Manual section 6 5 Primarily useful with the SC 2030 charger Not recommended unless you understand the float requirement 4 History data available with the TM 2030 Table 1 below summarizes the 36 items of history data It is available at Operating Levels L2 L3 or L4 It is being recorded at level 1 but is only accessible at L2 or higher These are useful for a technician to determine if your system is working properly or to diagnose a battery sys
18. e Days since equalized number to zero to stop the blinking First access the dSE display as described in figure 1 Then use the RESET button After the equalization period elapses it will blink again This function is also used to start equalization with SC 2030 charger See SC 2030 User s instructions 2 2 3 To activate audible alarm see P9 and P13 on page 12 after reading section 5 2 3 Who might want to use operational level L2 L3 or L4 See section 3 Level 2 will allow observing the History data always being recorded see page 5 Level 3 will allow these additional functions e Allows addition of the optional Bogart Engineering SC 2030 30 Amp solar charger for your batteries e Allows setting up the audible and visual low battery alarm Table 3 P9 and P13 eUsing a 100A 100mV shunt instead of the more usual 500A 50mV shunt see Table 3 P11 e Allow disabling the automatic reset when the batteries are charged see Table 3 P12 eChoice of efficiency factor different from the default 94 see Table 3 P10 and Section 6 2 eCalibrate the battery voltage see Table 3 P18 eAllows observation of filtered values of volts and amps used for determining when batteries are charged See section 3 and section 6 2 step5 Level L3 and L4 3 Beyond beginners Instructions for Operating levels L2 L3 L4 To change see Table 2 program P7 Level L2 has all the functions of L1 but also allows a
19. e just repeat until you succeed 3 You will now observe data at H1 1 on table You can record this data in the box on this table just under X 1 near top left table Push SELECT to move down one row on table Push RESET except for H1 1 to view and record all data moving to right back in time in table Push SELECT to move down one row and then repeat steps 5 amp 6 until table finished N OOA Date of record History X 1 X 2 X 3 X 4 X 5 Number Most Recent Least Recent H1 1 Cumulative A hr H2 Hours since H2 f H2 5 cycle ended H3 Length of H3 5 Cycle hours H4 Amp hour i H4 5 efficiency H5 Cycle Low i H5 5 Full H6 Cycle Min H6 5 volts H7 Day s i H7 5 Maximum Volts H8 Day s H8 5 Minimum Amps 5 Charge Discharge cycle info H9 Day s percent i H9 5 amp hr charge 5 day Log Info To aid in system analysis view values programmed in Program modes P1 P2 and P3 and record them here See Section 5 Table 2 page 6 of these instructions Program mode item Value P1 voltage charged setpoint Volts P2 current charged setpoint Amps of P3 value P3 Battery capacity setting Amp Hr
20. e battery is not at the top of charge and not gassing A battery is not charge efficient while at the top of charge so if this part is excluded the battery is very charge efficient We have measured this to be 95 98 with Trojan wet cell batteries Also note when batteries are given a good adequate charge they will not show up with very high efficiency P11 Shunt type This must be set according to the shunt type you have This determines the sensitivity of the amp input to the TriMetric so that it reads correctly for the shunt you have If your amps readings appear to be off by a factor of 10 the most likely cause is this that is not set correctly for your shunt Choosing value of shunt type At L1 level this is fixed at the more common S500A 50mV shunt The 500A 50 mV shunt is specified by Sh H High current shunt If you have a 100A 100 mV shunt you should enter Sh L Low current shunt Only the ratio shown is important to the TriMetric so that from the TriMetric s point of view a 200A 200 mV or 300A 300 mV shunt is equivalent to a 100A 100mV shunt P12 Automatic reset on off for amp hours described in section 6 2 step 3 It must be on to measure battery percent full but it may be turned off if the meter is used in a different application When off amp hours will never be reset to zero except by using the manual reset button The Percent full will then not work to provide battery percent full information
21. ement should be recorded Usually to occur late at night Also see section 6 4 P17 Voltage calibrate Set to correct batt voltage This allows slight adjustment of battery voltage Use accurate digital voltmeter and adjust to that value HOLD RESET to INCREASE Push RESET repeatedly to DECREASE Also see section 6 4 P18 Program all factory values Percent overcharge before float 0 20 Percent of P3 to which amps is limited during finish charge 0 10 One button auto entry of eight most important program data Profiles 1 31 Sets all values shown as Factory values in this table Hold RESET for about 4 seconds to accomplish Also see section 6 4 P19 Used only by SC 2030 charger See SC 2030 instructions Used only by SC 2030 charger See SC 2030 instructions Allows quick entry of all or most program data especially when used with SC 2030 charge controller TABLE 3 Additional program modes for Operating Level L3 and L4 6 Reference section more technical information ewarranty and specifications eHow TriMetric keeps track of battery full eUsing History data eProgramming function descriptions 6 1 TM 2030 Warranty and Specifications Warranty 4 years provided there are no obvious signs of abuse We will repair or replace at our option to operate at a level specified or implied by our instructions Main battery B1 Measures Volts Amps Watts Battery Full Amp hours from full Days
22. f the following Batt full to 100 Amp Hours from full to 0 Ahr Days since charged to 0 days TO ACCESS PROGRAM OR HISTORY DATA Hold SELECT down and watch for P1 Program or H1 1 History at left in display then release SELECT See sections 5 and 6 4 for details on Days since equalized to 0 days al data See sections 4 and 6 3 on history to RESET any of these 1 Use SELECT to view it on display 2 Push and hold RESET for 5 NOT SURE WHERE YOU ARE Push SELECT seconds repeatedly until you get back home Except when viewing rPC hold down RESET to view previous discharge minimum Amp hours TM 2030 Operation Summar FIGURE 1 Shows i of TM 2030 RV but TM 2030 A operation is identical dSC Shows the number of days since the battery has been fully charged This display gradually increases by 1 00 every day until the battery is charged at which time this value is automatically reset to 0 00 To understand precisely what the TriMetric considers charged refer to section 6 2 How the TriMetric keeps track of Battery oFull For this number to be correct Program values P1 P2 and P3 must be correct as described in Installer s Instructions for TriMetric TM 2030 dSE Days since the battery was equalized Equalization refers to occasionally overcharging a battery to help it maintain its capacity It is usually recommended only for liquid electrolyte lead acid batteries not AGM or Gel types T
23. ge a precise definition is given in section 6 2 How the TriMetric keeps track of battery full H2 and H3 Did too many days go between full charges H4 System efficiency Is a reasonable percent of the total charging energy being recovered during each discharge 80 97 not too much or too little H5 How deeply are the batteries being discharged H6 How low does the battery voltage go More detail about what H2 H6 can tell you H2 1 through H2 5 somewhat redundant information to H3 How many hours ago that the cycle in question ended H2 1 most recent cycle H2 5 oldest cycle data H3 1 through H3 5 Length of the cycle in question in hours This shows how much time goes by between full battery charges Frequent charging helps keep them from permanently losing capacity If solar charging is used and the days are sunny they should charge nearly every day If times are too long say over 4 or 5 days 96 120 hours in a system that is being significantly discharged every day batteries may not being charged sufficiently to maintain their capacity although this could be OK if they are hardly used and mainly on float Long times could also mean either that the charger absorb voltage or absorb time is set wrong or that the charged setpoints in the TM 2030 programs P1 and P2 may be set incorrectly so that the charging system cannot reasonably reach them Then refer to data in H7 H9 below to show why H4 1 thro
24. ghtly discharged then a large percentage showing as rPC could be insignificant TM2030 Version 2 2 or higher 2 2 What are Battery Reminders This is an optional feature that is designed to help you keep your batteries maintained which can remind you to periodically charge your batteries to maximize their life It comes from the factory turned OFF More detailed information about the need for proper charging can be found in section 7 of these instructions Important information on how to keep from killing your batteries At basic Operating level L1 there are two reminders which you can invoke if you wish 2 2 1 Ch F Charge Full Reminder to charge batteries fully if they haven t been charged in several days You can choose how many days Lead acid batteries need to be frequently fully charged otherwise they will lose capacity We recommend no longer than about 5 days See program P5 table 2 If you set it for 5 days then if 5 days pass without fully charging the batteries the message Ch F will occasionally blink in the display until batteries are again fully charged 2 2 2 Ch E Charge Equalize See the end of Section 7 for a discussion of equalization This display will blink Ch E as a reminder to equalize batteries typically monthly should you choose to use it Set the display interval in days or turn this feature off by using program P6 see table 2 After you accomplish equalization you must manually reset th
25. ging to 15 5 volts for 12V systems double this for 24V systems and keeping the batteries at that level for 2 hours Other manufacturers may have different recommendations It is usually advisable to check water levels in the batteries after equalization as it causes some water loss After equalization has taken place you must manually reset the days since equalized display by pushing reset when the days since equalized extra data is displayed this does not take place automatically This will turn off the time to equalize reminder which will reactivate only after another equalization period has elapsed For liquid electrolyte batteries Every month or so check the water levels in the battery cells to make sure that the water covers the plates It is not good for the batteries if the level drops below this level 15 Copy this table and use it for recording the TriMetric TM 2030 History data This data can be helpful to a technician trying to diagnose a problem with your system or to verify that it appears to be operating normally Also copy the data from program modes P1 P2 and P3 and copy it to the second chart at bottom To access this data 1 Set Operating level to L2 or L3 using program P7 See Section 5 Table 2 program item P7 on page 6 of these instructions for how to set to L2 or L3 Push and hold SELECT down and watch display for H1 1 then quickly release SELECT If you miss the first tim
26. he alarm s presence will still be indicated by the flashing BLo in the display window P10 Assumed charge efficiency factor Purpose of data charge efficiency factor See section 6 2 step 4 for an explanation of charge efficiency factor Choosing values of charge efficiency factor In the L1 mode this value is fixed at 94 If you wish to adjust it to a different value you will need to switch to L3 mode The actual charge efficiency factor for lead acid batteries while they are not at the top of charge is generally higher than 94 so this will usually give a conservative value for amp hours from full that is the meter will generally slightly under estimate the Full value for the batteries which will give a useful practical result for knowing state of charge Optional technical note Some people familiar with batteries will be surprised that the suggested efficiency factor is as high as 94 Without going into all the details here there are two reasons for this 1 The number entered in the TriMetric is not true battery efficiency or energy efficiency which is often quoted at 70 80 for lead acid batteries but charge efficiency Charge efficiency the ratio of total amp hours you get out divided by total amp hours to charge the battery is always greater than energy efficiency 2 What is entered in the TriMetric is not even the overall charge 12 efficiency of the battery but the charge efficiency while th
27. his display is intended to remind you when to equalize your batteries if this is not done automatically by your charging system It is essentially just a manual timer that reads in DAYS so that you can see how long it has been since your batteries were equalized Each day when not reset will advance by 1 00 day Then it must be MANUALLY RESET by you when you take action to equalize the batteries For how to reset this refer to Figure 1 in reference to the RESET button A or Pr A shows Amps Pr shows Watts This display shows either AMPS or WATTS depending on what has been programmed in P4 see table 2 on page 6 If the primary display shows AMPS then this one will show WATTS And vice versa rPC Replaced Percentage of recently discharged energy Not the same as full above This shows the percentage of charge that is being replaced compared to the amount that was recently removed during the last discharge cycle While discharging this display shows 0 When charging it increases when it shows 100 it has replaced the same amp hours that was last removed To preserve capacity of liquid lead acid batteries it is often recommended to overcharge to 110 120 before going into float For AGM batteries to 103 108 While showing rPC hold the RESET button down to view how many amp hours were removed during the last discharge cycle This is the base on which rPC is calculated The reason for showin this is that if batteries were only sli
28. iMetric amp hours from full display will give a reading of amp hours which reasonably closely estimates how many amp hours have been removed 5 It was mentioned in step 1 above that filtered values of volts and amps are used to judge when the batteries are charged This means that before using these values they are filtered so as to be only very slowly responsive versions of volts and amps are used so that quick variations of voltage or current don t give a false charged signal They are filtered with a time constant of about 2 4 minutes These filtered versions can be viewed if desired by putting the TriMetric in Operating Level L3 when viewing the volts or amps display you will see the filtered version by holding down on the RESET button The battery full reading of the TriMetric just puts the amp hours from full number in a different form which depends on the amp hours Capacity number that has been programmed in to the TriMetric in program number P3 When the battery is full and the amp hours from full value is 0 then the Battery full will be 100 When the battery is depleted so that the amp hours from full goes to a negative value equal to the capacity programmed in P3 then the Battery full goes to zero 6 3 What History data can tell you about your system See the chart on the last page to see how to access and record this data As expl
29. ich the penalty is having to replace your batteries too soon is charging with insufficient voltage or not charging long enough to get them fully charged Charging voltage One of the most important numbers to know about your batteries if you wish to maximize their life is the Recommended absorption charging voltage for the batteries This is usually given for a battery temperature of 25 degrees C or 77 degrees F The typical well designed charger or charge controller used with deep cycle batteries which are the type of batteries designed to be periodically discharged and charged starts by charging fairly fast at a high rate of amps but the battery voltage may start out low if the battery is not well charged Charging causes the battery voltage to gradually rise over a period of possibly hours but as soon as it rises to the absorption charging voltage the charger is 13 supposed to be smart enough to stop allowing the voltage to rise higher than this to avoid damage to the batteries although the charger will continue to send current to the batteries at this voltage while the current amps slowly declines The manufacturer of the batteries should specify what this voltage should be Get information on charging parameters from the manufacturer or ask the dealer who sold them to you who hopefully should know Unfortunately many do NOT know This voltage will be slightly different for different types of batteries For example 12
30. in the Installer s Instructions for TriMetric 2030 The additional functions applicable to level L3 are summarized in Table 3 below If you need more information than given in Tables 2 or 3 look at references in section 6 4 of these instructions To observe program data follow steps 1 and 2 To change program data follow additional steps 3 and 4 1 HOLD DOWN the SELECT button and watch as the display cycles through several different displays When you see P1 in the display immediately release SELECT If you don t release quickly enough just wait longer holding down SELECT until you see the P1 again then release Then the Charged setpoint voltage first item shown in table below will alternate with P1 so you can observe its value 2 Push SELECT repeatedly to observe programmable data P2 P3 etc as shown in the left two columns below After going through all of these it will go back to observing normal display data Volts Amps etc 3 If during step 2 you see programmable data that you wish to CHANGE push both SELECT and RESET briefly but firmly at the same time Three green lamps will flash to indicate that you can now change the data Successive pushes to RESET will increase the numbers slowly Hold RESET down longer to speed up the change this will cause data to cycle more quickly through all the possibilities To make values go down you will need to keep increasing until it finally jumps to its lowest value ag
31. r as your primary choice Explained on Table 2 P5 Days before time to recharge Battery reminder Explained in section 2 2 1 and Table 2 P6 Days before time to equalize Battery reminder Explained in section 2 2 2 and Table 2 P7 Operating Levels This allows switching to any of four Operating levels L1 simplest and OK for most users L2 All of L1 plus allows viewing History Data information L3 and L4 All of L2 plus many additional programming options shown below L4 also redefines charged criteria See section 3 The following program items are available when the TM 2030 is switched to L3 or L4 level Use program P7 to select L3 or L4 Program modes P8 P14 P15 P16 P20 P21 and P22 are only used only with the optional SC 2030 charge controller See SC 2030 Solar Charger User s Manual Section 6 4 and profile graphs for exact descriptions P9 and P13 Audible Alarm How to turn on or off First be sure to program P7 above to L3 or L4 Activate audible alarm by programming P9 so it is NOT OFF but has a number Adjust the number for Percent full below which you want the alarm to sound We suggest 50 to start Then go to program P13 and program a battery voltage below which it will sound Suggest 11 4 for a 12V system 22 8 for 24V Then the alarm will sound if the volts go below 11 5 or the Full goes below 50 When the alarm comes on it may be silenced by the reset or select button but t
32. r your batteries have been pretty well charged Why solar panels can be good for batteries Even if you don t get all your energy needs from solar these are often a very useful complement to your engine chargers to reduce the amount of engine time required to charge and yet get a good charge on your batteries Use your engine charger s to begin charging when your batteries are low which is when they absorb energy at a higher rate making more efficient use of your engine Then once they approach full charge turn off the engine and let the panels deliver a slower but much longer charge to get your batteries well charged without having to run a generator for a long time Charging to full sufficiently often It doesn t hurt to discharge a deep discharge battery to 50 or less that s what they are designed to do but lead acid batteries should not be left uncharged for a long period The reason is that if the lead sulfate reaction product that is produced as the battery is discharged is left too long it changes its form so as to be harder to convert back to its charged state lead lead dioxide and sulfuric acid so you will not be able to retrieve as much energy 14 from the batteries We suggest charging to full at least every five days or so To help the TriMetric has a battery reminder function to remind you to charge the batteries fully after a certain number of days have elapsed in which they have not been brought to
33. ramming function instructions for observing and changing programming items is in section 5 P1 and P2 Charged setpoint voltage and charged setpoint amps Purpose of data The charged voltage P1 and amp P2 setpoints provide information the TriMetric uses to determine when your battery set is charged Details are given in section 6 2 The amp setpoint P2 is now entered as a percentage of P3 unlike with the TM2020 or TM2025 when the amps were entered directly So the actual amps value below which the batteries need to be charged is the percentage in P2 times the capacity P3 About voltage and current charged setpoints Of these two setpoints the voltage setpoint is the most critical and the current setpoint less so If you have only low current charging sources you could set the current setpoint to OFF however both should be used if at least one of your chargers is a high current charging source such as a generator charger or inverter charger More specifics follow Choosing charged setpoint volts Section C1 of the Installers instructions for TriMetric TM2030 has simpler instructions on determining these parameters Similar information is given in section 7 of these instructions Some technical details For a 12 V lead acid battery system the voltage setpoint will usually be between 14 0 and 14 8 volts Double these numbers for 24V systems or multiply by 4 for 48V systems As pointed out in Section 7
34. s track of battery full The Trimetric uses Capacity P3 charged setpoint volts P1 charged setpoint amps percentage P2 and efficiency factor P10 Initially when the TriMetric is first turned on it does not have any way of knowing how full the battery is The battery full display will start out blank Here are the steps it uses to determine the full 1 First the battery must be initially charged fully When the TriMetric is charging there are two choices you can select for what defines full charge A More common choice if program P7 is in level L1 L2 L3 Two conditions must be met simultaneously 1 while charging the battery voltage must exceed the Charged setpoint voltage which you set by Program 8 P1 and 2 the charge current amps must decline to below the Charged setpoint amps which percentage you set by Program P2 Note that filtered versions of Battery voltage and battery amps are used described in step 5 below B Less common choice if program P7 is in level L4 This is typically a higher level standard for charged than when in Levels 1 3 It allows additional requirements for charging time and degree of overcharge percentage required It is possible to use this to define charged with or without the SC 2030 connected The batteries must reach the float condition as described in the
35. st after B1 volts If you choose AMPS then WATTS shows on the secondary display And vice versa Days before time to recharge reminder When Days since charged equals or exceeds this number 1 100 days or OFF the time to recharge Ch F reminder will flash periodically in display See section 2 2 Days before time to equalize reminder When Days since equalized exceeds this the time to 1 100 days or OFF equalize Ch E reminder will display See section 2 2 Chooses Operational level Choose L1 L2 L3 L1 is simplest level L2 next level shows historical data or L4 L3 Shows all of L1 and L2 plus additional programming options See section 3 for meaning of L4 TABLE 2 Program modes for Operating level L1 simplest PROGRAM MODE NUMBER Used by SC 2030 charger PROGRAMMABLE DATA and ADJUSTMENT RANGE Factory and L1 L2 value WHAT IT IS FOR SUMMARY Where to find more information write your value here P8 Max Allowed Charger Voltage 10 0 65 0V Used only by SC 2030 charger See SC 2030 instructions P9 Low Battery Audible Alarm Setpoint Off or 1 100 percent Assumed efficiency factor 60 to 100 percent When not OFF audible alarm will sound and battery reminder bLO will flash when full is less than this value or if battery volts less than P13 setting When meter calculates amp hours Disch
36. t This can cause the charge setpoints to be achieved with a lower state of charge than before so less energy was able to be charged Similarly an occasional low percentage could result if the temperature has risen at the batteries because when warmer they can accept more charge than before when cooler which will reduce the apparent efficiency value There should be some consistency in the readings Although the values should ordinarily be less than 100 as said they can occasionally be greater than 100 when the temperature of your batteries drops as explained above If readings are wildly inconsistent it could be a wiring error with a source or load that is connected to the negative side of the battery a frequent installer mistake instead of on the load side of the shunt See Figure 1 of TM2030 Installation instruction H5 1 through H5 5 Minimum Battery full during each cycle This is another check to see how much usage the batteries are getting that they are not being run too low between charges 10 H6 1 through H6 5 Minimum voltage during each cycle This can show if the battery voltage is too low before being recharged Going below 11 5V or so 12V system would indicate batteries are nearing their low limit H7 H8 H9 check if proper charging is taking place Charging data for each of the last 5 days H7 Maximum charging volts H8 Minimum charging Amps H9 Maximum overcharge percentage eEach recorded data represents a
37. t is factory set to Level L1 the basic level suitable for most users and recommended for starting Section 2 of this manual describes the operation for level L1 L2 allows observing Data Logging Levels L3 and 14 allow additional functions described page 4 Who might want to use operational level L2 L3 or LA 2 Basic instructions for Operating Level L1 Refer to figure 1 which covers basic operation It also has references for further information Note that full will display only 3 dashes until system is fully charged for the first time 2 1 More details on the five less used display items which you may not need to know AH This is the measure of Amp hours from a full battery See section 6 2 How the TriMetric keeps track of battery full for a description of how this is measured This is just another way to look at the full data For this number to be accurate you must set Program numbers P1 P2 P3 as described in separate instructions Installer s Instructions for TriMetric TM 2030 If you use this meter at Level L3 then also P10 and P14 must be correct Continued page 4 IMPORTANT DISPLAY NOTE Flashing decimal point means multiply CHARGING LIGHT the number seen by 1000 When lighted shows battery 1 is charging amps or watts is positive Flashing lamp means battery is charged BATTERY REMINDERS optional eae ae Lamp flashes and display occasionally shows these letters when b
38. t of the current setpoint will ensure that the TriMetric will not consider the batteries charged until the charging current goes below the setpoint amps The lower you set this value the more charged the battery must be before the TriMetric will declare the battery to be charged To set this value you must know the amp hour capacity of your battery system which has been set in program P3 We often suggest value for the current setpoint setting that is 2 of C which is the default setting when the meter is new where C battery system capacity in amp hours that is programmed in P3 For example if you put 700 amp hours into P3 then a P2 amps setting of 2 would be 2 of 700 14 amps Better charging would result using 1 of C or even 0 5 for the battery to be really charged however this may require more solar time for example than is usually available If you are in complexity levels L1 L2 or L3 when you enter the current setpoint the TriMetric will require that simultaneously both the filtered voltage setpoint be equal or exceeded and the filtered current amps value be less than or equal to the current setpoint before the TriMetric will indicate that the batteries are charged In level L4 further requirements need be met as described in the SC 2030 Solar Charger manual The filtered values are very sluggish versions of these parameters explained in Section 6 2 step 5 Also if you are set to complexity le
39. tem problem To view the History data Go to page 16 last page of these instructions which describes how to access this data A chart is provided there for recording the data To understand what this History data can tell you about your system See section 6 3 on page 9 The items H2 through H6 refer to data during the last 5 battery charge discharge cycles The items H7 through H9 refer to data during the last 5 days Display No of Summary History Description Identifier items See section 6 3 for more detailed explanation H1 1 Cumulative lifetime battery discharging amp hours Analogous to a car odometer this display shows how much wear has occurred on your batteries due to the repeated cycling of your battery system Every time you remove energy from your batteries this display records the amp hours you are taking out but it does NOT record the charging amp hours when you charge In this way it measures the wear caused by the discharging and charging chemical activity on the battery over its lifetime RESET to ZERO by pushing and holding RESET for 4 seconds while displaying this data H2 1 2 5 5 For last 5 charge discharge cycles Hours since the end of each cycle H3 1 3 5 5 For last 5 charge discharge cycles Length of each cycle hours H4 1 4 5 5 For last 5 charge discharge cycles Charge efficiency measurement Shows how much more amp hours to charge compared to last discharge in percentage
40. time sufficiently long from 1 8 hours 2 Better is to retain the absorption voltage for a long enough time for the charging current in amps to drop to a low enough value sometimes called the return value This is what the TriMetric measures when it makes a judgment about whether the battery is charged A practical value for this value of amps is to take the total amp hours capacity of the battery system and divide by 50 to 200 to get an amps value to which the batteries should reduce before charging is completed We often suggest capacity 50 2 of capacity not because it is absolutely ideal but it is a compromise for getting them charged in a reasonable amount of time 3 Often considered the best way is to return a specified additional percentage of amp hours for liquid electrolyte batteries returning 110 to 115 of the charge that was just previously discharged is often recommended for AGM batteries the number is 104 108 Very few chargers use this method but our SC 2030 solar charger has this capability when paired with the TM 2030 monitor 4 The classic but rather inconvenient method which works only for liquid electrolyte batteries is to use a hydrometer to measure the specific gravity of the battery acid of each cell to see that it comes up to a high enough value as specified by battery manufacturer But if you have liquid electrolyte batteries this is worth occasionally checking to be done just afte
41. to 10 000 Amp hrs Serial Data 5V output stream with all TriMetric real time data ASCII coded Charge criteria defined by Filtered voltage above Vset Filtered amps less than Iset Time greater than Tset all three adjustable Filtered time constant 140 seconds See Section 6 2 for detailed description Power Requirement Power from main battery B1 9 65V 32mA with display lighted 16 mA with display off Size TM 2030 RV Box is 4 1 4 high x 3 x 1 3 8 inch depth with 1 2 in mounting tabs top and bottom 10 8 x 7 6 x 3 5 cm TM 2030 A 4 1 2 x 4 3 4 panel with circuit board 1 1 8 max in deep 11 4 x 12 1 x 2 85 cm History data retained in memory when power turned off eCumulative amps discharged during battery lifetime 0 999 000 amp hours to measure battery wear for last 5 charge discharge cycles the following are recorded eHours ago since end of cycle eLength of cycle hours e Amp hour efficiency factor for each complete cycle to show charge efficiency of battery system e Minimum voltage for each cycle e Minimum battery Full for each cycle For the last 5 days e Maximum voltage each day eAmps value intended to show how close to charged the battery system got When maximum voltage greater than charged setpoint volts shows minimum amps When maximum voltage less than charged setpoint volts shows amps at maximum voltage e Maximum value percent charge returned compared to most recent discharge 6 2 How the TriMetric keep
42. ty of your batteries The TM 2030 also measure voltage only of a second battery set such as the motor starting battery or even a solar panel input voltage if desired New to the TM 2030 an audible alarm can signal a low battery to activate see p 4 sec 2 2 3 And a new display shows Replaced Percentage rPC shows how much of the most recent discharge has been replaced to your batteries during the next day s charging Ideally this should reach 110 or even more Data logging for technical people to diagnose system problems For each of the last 5 days the daily maximum battery voltage level and minimum charging amps is recorded as well as the percent of overcharge achieved Many battery companies say proper overcharge is important for battery maintenance It also logs for up to five of the most recent charge discharge cycles cycle length charge efficiency minimum battery full and minimum voltage level for each cycle This is useful diagnostic information which a technician can use to determine that your whole system is working properly Serial data output For extreme techies only The TM 2030 also has a serial 0 5V output with streaming real time serial ASCII data that could be used to control other electronics This is described on our website 99 66 www bogartengineering com under support application notes TriMetric 2025 You may select 4 Operating Levels at which this meter will operate Level L1 L2 L3 or L4 I
43. ugh H4 5 Total charge efficiency over each cycle records total discharge divided by total charge which shows how efficiently the batteries are storing energy for that cycle which from a theoretical system efficiency standpoint would be ideal if 100 but for a real system will be less If this number is consistently over 100 that means that the wiring to the shunt is incorrect batteries cannot be more than 100 efficient possibly a charging source possibly solar controller or chassis ground connected to the negative post of the battery instead of on the load side of the shunt so the meter is not measuring it If unreasonably low say below 70 that may also indicate a miswiring in this case a load that is connected to the negative post of the battery Or perhaps the batteries are old and inefficient Or the charger could be overcharging the batteries which could also be damaging batteries but this may not be significant if batteries have been recently very lightly used see rPC in section 2 1 page 4 For liquid electrolyte batteries an average number between 80 and 90 is reasonable If a higher average the batteries are getting less than 10 overcharge which is usually less than optimal for liquid electrolyte batteries For AGM batteries ideal could be 92 96 as they do not need as much overcharge Another cause of an occasional high percentage is that the temperature has gone down significantly between one full charge and the nex
44. vel 3 or 4 using Program P7 you can observe these filtered values of amps and volts To do so when observing either amps or volts when you hold the reset key down the filtered value will show in the display Usually in float mode Another possibility we should address is if your charging system stays much of the time in float mode which may be true for a line tied system or a battery system in an RV that is only occasionally used with its battery usually connected to a charger that maintains it at float voltage With a lead acid liquid electrolyte battery the float voltage may be 13 4 volts for 12V system For a system that is usually in float mode the TriMetric voltage setting can be just below 13 4 or whatever the float voltage is and the amps setting can be for some low value such as C 90 or so or to a value which the amps would only go below during the float condition Then the TriMetric will reset only after the float condition is attained P3 Battery assumed capacity This is the basis for calculating the Battery full number The Battery Full is calculated as Capacity AmpHoursFromFull Capacity expressed as a percentage The Capacity in amp hours is what you program in here The AmpHoursFromFull is the value shown on the secondary display group Also see the Tnstaller s instructions for TriMetric TM 2030 section C under program item P3 P4 Watt Amps choice Select which you prefe
45. volt liquid electrolyte lead acid batteries will have an absorption charging voltage of about 14 4 15 0 volts AGM or Gel batteries will have a lower voltage perhaps at 13 9 14 4 volts Multiply these by 2 or 4 for 24 or 48V systems Your charger s must then be set to the battery manufacturer s not the charger manufacturer recommended voltage If the voltage is too low or too high battery life will be impaired It is especially important to get this correct for the AGM or Gel types not least because they are even more expensive than liquid electrolyte types Ideally you can adjust this voltage on every charger or charge controller you have Unfortunately some chargers do not leave much choice and some do not charge to a high enough voltage and then you will have to settle for whatever the charger determines at possible detriment to your batteries If you have multiple charging sources for example if you have a stand alone generator a charger or converter and also solar or perhaps also your engine alternator ideally all chargers should be set identically according to what the battery manufacturer recommends Often that s not possible say for engine alternator then the voltage value for that charger should be lower however then you should have another charger to back that one up to periodically charge to the proper absorption voltage if you want to maximize battery life Although some chargers just have a switch that says AGM or
46. would be expected to last If it approaches this you should record the value and manually reset it since it does not just roll over to zero by itself after 999 999 Often battery life of deep cycle batteries is rated by the number of discharge cycles they will undergo without failure however this usually assumes a fairly complete discharge during each cycle followed by complete 9 recharge The life of deep cycle batteries is increased if the discharge depth is less in fact the number of cycles of life is inversely related to the depth of discharge of each cycle so if you discharge only half the amount during each cycle the battery typically will last about twice as many cycles When buying batteries you have a choice whether to double the number of batteries in your battery set which will reduce the average cycle depth of discharge to one half which should approximately double their number of cycles If the number of cycles did actually double there would be no cost benefit since twice the battery size would cost twice as much to replace Of course you d get more days of autonomy But in a vehicle it would add extra weight This measurement is a way of getting quantitative data on these kinds of questions H2 H6 Battery Charge Cycle Data provide answers to these system questions for the last five charge discharge cycles A discharge charge cycle begins at the time the battery is fully charged and ends at the next full char
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