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WRM30 – User Manual PV CHARGE CONTROLLER
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1. WESTERN CO ELECTRONIC EQUIPMENTS SOLAR SYSTEMS WRM30 User Manual E ee LADY Rev 1 2 18 03 2014 PV CHARGE CONTROLLER WRM30 _ MPPT CHARGE REGULATOR WRM30 is a PV charge controller for big off grid systems It is suitable for 12V 24V 48V systems and it can handle a photovoltaic power up to 1 5 1 8kW WRM30 has been properly designed for industrial applications such as the power supplying of either TV radio bridges road signs or whole houses completely off grid WRM30 implements a research circuit for the maximum power of panel MPPT regardless of battery voltage and its state of charge the charge controller makes always the PV module work at its point of maximum power maximizing the energy extracted from the PV module and charged into the battery Charging is temperature compensated Special feature of this product is the presence of two separated charging channels and therefore a double input for PV modules This allows the management of two independent strings for example in the case they are composed of modules with different features or exposed on two slopes or with identical strings channels can be paralleled thus optimizing efficiency The load output can be activated according to several programs that can be selected by the user load ON 24h 24h load ON only during the day load ON only during night and load ON during night for a number of hours from 1 to 16 WRMB30 detects the
2. lt Pressing this button you can modify the setting Pressing this button for 1 sec you select the default value win The mode selection for MPPT search is chosen between the following two in an automatic way default Aut wii The two channels A and B of PV modules are considered as paralleled therefore having a common point of maximum Ailb power The two channels A and B of PV modules are considered as independent that is each with its own point of maximum A b power It sets the time of absorption Time in hours in which the battery must remain at VEoC voltage before going to the voltage VEoC float lt Pressing this button you can modify the setting Pressing this button for 1 sec you select the default value Pressing this button for 1 sec you select the default value The selectable values are from 1 to 32 hours default 16 hours 5 oe a B From this page if you press this button you go back to the 1 page of configuration It sets MODBUS node address This address identifies the net node with MODBUS protocol on RS485 bus Pressing this button you can modify the setting This document is the property of WESTERN CO Srl All rights are reserved Reproduction and use of information contained within this document is forbidden without the written consent of WESTERN CO Srl N VFA R 1 2 SSWESTERN C0 i f ev 1 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS W R M 30 U se r M a n u
3. any other communication made between the manufacturer and the purchaser in respect of the above For any dispute the jurisdiction is Ascoli Piceno Waste disposal Western Co as manufacturer of the electrical device herein described and in accordance with DL 07 25 2005 n 151 informs the consumer that this product once abandoned must be delivered to an authorized collection center or in case of purchase of an equivalent equipment it can be returned free of charge to the distributor of the new equipment The penalties will be applied by individual Municipalities WESTERN CO srl Via Pasubio 1 3 63074 San Benedetto del Tronto AP Italy Ph 39 0735 751248 fax 39 0735 751254 e mail info western it web www western it
4. has to be set when you connect Western Co Leonardo inverter to the battery Li program must be used for the charge of Li lon batteries setting the end charge voltage according to the instructions of the manufacturer of the lithium battery The selectable values in steps of 0 1 V are 14 0V 14 1V 14 2V 14 3V 14 4V 14 5V 14 6V 14 7V for 12V systems 28 0V 28 2V 28 4V 28 6V 28 8V 29 0V 29 2V 29 4V for 24V systems 56 0V 56 4V 56 8V 57 2V 57 6V 58 0V 58 4V 58 8V for 48V systems This document is the property of WESTERN CO Srl All rights are reserved Reproduction and use of information contained within this document is forbidden without the written consent of WESTERN CO Srl SY Rev 1 2 SWESTERN CO i BS ev 1 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS WRM30 User Manual WA SS 18 03 2014 To choose the correct value of charging voltage for Li lon batteries you need to consult the manual of your selected battery When the Li program is active the end charge voltage is not temperature compensated and it is set to the selected value for each temperature value read by WRM30 It sets the voltage threshold of intervention of Low Battery protection load disconnection in case of low battery Pressing this button you can modify the setting Pressing this button for 1 sec you select the default value The selectable values are 12V 10 80V 10 96V 11 12V 11 28V 11 44V 11 60V 11 76
5. p ANI Rev 1 2 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS W R M 30 U se r M a n u al ZAL 18 03 2014 General description WRMB0 is a PV charge controller for either sealed SEAL or flooded lead acid FLOOD electrochemical lead batteries From firmware version 1 1 onwards we introduced the charge program for lithium ion batteries Li lon with integrated Battery Management System BMS advise you to contact Western Co to select the right lithium ion battery to connect to WRM30 charge controller It is absolutely forbidden to connect to WRM30 lithium ion batteries without BMS the BMS protects the battery from unsafe operating conditions that can lead to battery s explosion or burning In fig 1 there is a principle diagram of WRM30 Fig 1 Principle diagram 1 Charging circuit it consists of two identical but distinct channels It adapts VPAN and IPAN respectively voltage and current of the PV module in order to search for the condition in which the power delivered by the PV module is maximum realizing what in the technical literature is indicated with the acronym MPPT Maximum Power Point Tracking It also manages the battery charging reducing the current delivered to the battery in the conditions in which the voltage Vba equals its charging voltage Veoc 2 Parallel Independent this external connection must be inserted when you have either a single photovoltaic field or a separated one but on a single fl
6. remain with only the animation of the charging current lt Pressing this button it appears temporarily the reference to the displayed channels in this case cAb that is the value is relative to both channels A B Pressing this button for 1 sec this energy counter is reset to zero It displays the battery temperature detected by the external sensor Tsar The other indications of the main page remain except for animations A flash of the battery icon and of C symbol indicates the absence of remote temperature sensor It displays the temperature detected by the sensor that is inside WRM30 Tnt You can see the indications of the following icons day night load status and low battery alarm It displays the current absorbed by the load lioan The other indications of the main page remain with only the animation of the load current It displays the power absorbed by the load Ploan The other indications of the main page remain with only the animation of the load current It displays the counter of energy absorbed by the load Eroan The other indications of the main page remain with only the animation of the load current ial Pressing this button for 1 sec this energy counter is reset to zero It displays the voltage on the module of channel A Vana The other indications of the main page remain with only the animation of the PV module current Pressing this button it appears temporarily th
7. 29 20 14 60 Hp Pn al p mmo ference i 5S 57 60 28 80 E E Ta a ee E ES S S r S E a E E E e E seso jo 2840 14 20 Hompe a e S E 56 00 28 00 1400 ee a a a a a es Bol aoj ne a ee Se a 54 40 27 20 13 60 1 pf ff G j _ 10 5 5 10 15 20 25 30 35 40 45 50 55 60 48V 24V 12V Temperature C Graph 1 Trend of end charge voltage according to battery temperature 99 98 97 96 95 94 93 92 91 90 Vpan V Graph 2 Efficiencies This document is the property of WESTERN CO Srl All rights are reserved Reproduction and use of information contained within this document is forbidden without the written consent of WESTERN CO Srl WGWESTERN O i B VA Rev 1 2 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS WRM30 User Manual IAAI 18 03 2014 Dimensions 1 78 oye WESTERN CO a Peo MPPT CHARGE CONTROLLER screws for door opening electrical send use of information contained within this document is forbidden without the written consent of WESTERN CO Srl WESTERN CO i B VA Rev 1 2 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS WRM30 User Man ual AN 18 03 2014 Fig 4 Dimensions mm This document is the property of WESTERN CO Srl All rights are reserved Reproduction and use of information contained within this document is forbidden without the written consent of WESTERN CO Srl A
8. V 11 92V 12 08V 12 24V 12 40V 12 56V 24V 21 60V 21 92V 22 24V 22 56V 22 88V 23 20V 23 52V 23 84V 24 16V 24 48V 24 80V 25 12V 48V 43 20V 43 84V 44 48V 45 12V 45 76V 46 40V 47 04V 47 68V 48 32V 48 96V 49 60V 50 24V It sets the threshold of the output voltage from Low Battery protection back to normal functionality Pressing this button you can modify the setting Pressing this button for 1 sec you select the default value The selectable values are 12V Aut VEoC 0 20V 12 72V 12 88V 13 04V 13 20V 13 36V 13 52V 13 68V 24V Aut VEoC 0 40V 25 44V 25 76V 26 08V 26 40V 26 72V 27 04V 27 36V 48V Aut VEoC 0 80V 50 88V 51 52V 52 16V 52 80V 53 44V 54 08V 54 72V It sets the mode of load operation lt Pressing this button for 1 sec you select the default value oe Load always ON during both day and night 24h 24h C i 4 iw Load ON only during the night for the displayed hours light sensor with timer on Eanes Ew Load ON only during night complete light sensor Load ON only during day inverted light sensor It sets the voltage threshold below which the night is detected Pressing this button you can modify the setting Pressing this button you can modify the setting Pressing this button for 1 sec you select the default value The selectable values are 12V 24V 48V 2 00V 3 28V 4 56V 5 84V It sets the mode used to search for MPPT lt
9. WESTERN CO i p ANN Rev 1 2 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS WRM30 User Manual AIS 18 03 2014 Warranty Western Co Srl guarantees the good quality and good design of its own Products obliging itself during the warranty period of 5 five years to repair or replace at its sole discretion for free those defective parts owing to poor quality of material or defect in workmanship The defective product must be returned to Western Co Srl or to the company delegated by Western Co to make product support at customer s expenses together with a copy of the invoice both for repairing and warranty replacement The costs of re installation of the equipment will be borne by the customer Western Co srl will bear the transport expenses of the repaired or replaced product The warranty does not cover Products that according to our discretion are defective due to natural wear showing damages caused by incompetence or negligence of the customer imperfect installation by tampering or other interventions different by the instructions supplied by us The warranty is not valid also in case of damages coming from transport and or incorrect storage of the product force majeure or catastrophic events frost to temperatures below 20 C fire flood lightning vandalism and so on All of the abovementioned guarantees are the sole and exclusive agreement which supersedes any proposal or agreement oral or written and
10. a l VA Ss 1 8 03 201 4 By pressing for 1 sec this button from any configuration page you return to the display pages without saving the modified configuration parameters If no button is pressed for 2 minutes from any configuration page automatically you go back to the display pages without saving the modified configuration parameters Holding down for 1 sec these buttons from any configuration page you go back to the display pages saving the modified configuration parameters which become operative t Counter accessible only by remote MODBUS For commands relative to MODBUS protocol refer to the programming manual Voltage Veoc Vret _f7_ SEPTER ABSORPTION Graph charging phases Tabs System s alarms and errors ALARMS Low battery Alarm The flashing low battery symbol indicates that the low battery protection has intervened and the load has been disconnected to preserve battery life This protection is activated when the battery voltage drops below the Vis threshold which can be set by the user WRM30 leaves this protection when the battery is recharged by the PV module at Vout voltage Over temperature Alarm It intervenes when the internal temperature of WRM30 exceeds 65 C it disables the charge and disconnects the load You automatically exit from this protection when the internal temperature falls below the threshold of 50 C The detected intern
11. al temperature can be seen on the display alternatively to error 01 Overload Alarm It intervenes when the load current exceeds the maximum allowed limit for WRM30 the charge controller disconnects the load to prevent internal damages If this alert occurs it is necessary to verify if the current absorbed by the load is below the allowable limit After 1 minute WRM3b0 tries to power supply the load again and it leaves this state if the cause that generated the overload has been removed After 3 overload events you have to wait for a night event to leave this protection ERROR CODES Voltage error of anomalous battery At start up the charge controller detected an anomalous battery voltage and therefore it was not able to detect the system nominal voltage This error may be caused by over discharged batteries therefore if this error occurs it is necessary to replace the batteries The detected anomalous voltage can be seen on the display alternatively to error 03 To exit this error you must restart the system ELECTRICAL FEATURES 12V 24V 48V UM nominal battery voltage nominal battery voltage nominal battery voltage iting Max in Tip Max min Tip Max Panel open circuit voltage vem lio so mluv Panel current per channe im ls Je elo Max PV module power per channel Pama o so o w Load voltage output v we vwa vwe lv toadeuren o Tw S
12. ap With the external jumper the charge controller sees a single photovoltaic field and distributes power equally between the channels In a system with two slopes or in any case where you want to maintain the channels independent the jumper must not be inserted and the charge controller will search for two different MPPT 3 Protections The switches act as an anti reverse battery protection and blocking diode They avoid that during the night when the PV module is not illuminated it can absorb current from the battery Internal fuses provide an additional degree of protection 4 Load the load is power supplied with the same battery voltage and it is controlled through a semiconductor switch 5 Microprocessor it controls the whole circuit it measures currents and voltages of PV modules battery and load and it shows them on the display 6 Fora more precise detection of battery voltage and temperature WRM30 uses a sensor to be positioned close to the terminals of battery the sensor is supplied SPC20 S It is important to connect this sensor to guarantee the compensation in temperature of the end charge voltage of the system Voc and for a measure of battery voltage independent of the voltage drop on cables If you do not connect this sensor the system will work equally but the battery voltage will be measured on the internal terminals of WRM30 while the compensation Veoc in function of the temperature will not be performed and prudent
13. day night status according to the PV module s voltage so it is not necessary to connect additional sensors to the controller It is equipped with a RS485 serial interface through which you can access all of the available functionalities Features e 12V 24V and 48V battery voltage e 12V 24V 48V auto detect e MPPT charge e Max charge current 30A e For sealed GEL flooded lead acid batteries and lithium ion batteries from rev 1 1 e Charge voltage compensated in temperature e Integrated blocking diode e Max power of PV modules 450W 12V 900W 24V 1800W 48V e Max Voc voltage on PV modules 150V e Double input of PV modules e Configurable parameters by two buttons and LCD e 18 load management programs e Maximum load current 15A e Low battery protection e Over temperature protection e Battery reverse polarity protection e Overload protection on output e RS485 interface e IP20 metal box e Terminals for battery cables 35sqmm e Terminals for PV modules cables 10sqmm e Terminals for load cables 4sqmm R os Se bas 12V GEL AGM DEEP 24 V FLOOD DISCHARGE 48V PROTECTION i Voc Max NIGHTLIGHT FUNCTION 150V 30A LOAD R8485 nan 15A d p This document is the property of WESTERN CO Srl All rights are reserved Reproduction and use of information contained within this document is forbidden without the written consent of WESTERN CO Srl AWESTERN CO i
14. e reference to the displayed channel in this case cA that is the value is relative to channel A 11 It displays the current delivered by the single module of channel A kna The other indications of the main page remain except the animation of the PV module current Pressing this button it appears temporarily the reference to the displayed channel in this case cA that is the value is relative to channel A It displays the power of the module of channel A Pana The other indications of the main page remain with only the animation of the PV module current Pressing this button it appears temporarily the reference to the displayed channel in this case cA that is the value is relative to channel A It displays the counter of energy supplied by the module of channel A E na The other indications of the main page remain with only the animation of the PV module current This document is the property of WESTERN CO Srl All rights are reserved Reproduction and use of information contained within this document is forbidden without the written consent of WESTERN CO Srl w o NJ Rev 1 2 WVSWESTERN CO i BS ev 1 neir te eier aad WRM30 User Manual AIR 18 03 2014 lt Pressing this button it appears temporarily the reference to the displayed channel in this case cA that is the value is relative to channel A Pressing this button for 1 sec this energy cou
15. ery connection the charge controller turns on and starts to work The cable sections must be chosen so that in each length of cable the maximum permissible voltage drop is less than 3 of the system nominal voltage Table 3 You can connect to WRM30 lead batteries with 12V 24V or 48V nominal voltage At power on the charge controller measures the battery voltage it recognizes the nominal voltage of the battery bank connected to it and it automatically sets the correct levels of charging voltage see General description The user must however configure the type of battery being used to adjust the correct charging voltage V_oc Please set SEAL configuration if you use either VRLA sealed or GEL batteries while set FLOOD configuration if you use flooded lead acid batteries see System configuration 4 n ANI Rev 1 2 WVWESTERN CO a ee eae eee EQUIPMENTS SOLAR SYSTEMS W R M 30 m U se r M a n u a l VA SS 1 8 03 201 4 5 Set the load management program proper for your own application Note do not connect to the LOAD output loads that absorb a current gt 15A otherwise the system goes into over current protection E02 and the load is not power supplied 6 Mount the supplied cable clamps so that the weight of the cables is not discharged on the electrical terminals but on the same cable clamp and install the front cover to protect the electrical connections For the cables of load and battery temperat
16. f not complied these recommended steps the WRM30 can be damaged Views WRMB30 is equipped with a display and two buttons for the user interface It is organized in two environments one for displaying and one to configure In the first one there is a main screen which summarizes the most important information of the system then other main screens show in detail other values The other environment concerns the configuration where the operating parameters of the system are set The various sequences are detailed in the following tables on those of displaying some are grouped different frame and background as they are logically linked by a common reference values referred to both channels temperature load channel A and channel B on config uration Charging current indicator Low battery protection ZL Load status 3 QO PV module current indicator Day night status pe Load current indicat or D SEAL gma gma je Charge e _ 1 H H Lane Viewer of internal measures Fig 3 Display PAGES SEQUENCE OF STATUS VISUALIZATION AND PARAMETERS lo Main page TT a B It displays the battery voltage Vgar the charging program currently selected SEAL or FLOOD the day night status sat H c v detected by the PV module ThE load status icon if ON indicates that the load is power supplied Finally there is the low battery alarm The animation of the bars indicates presence of current respectively from PV m
17. ially the Veoc will be set to the minimum value as if the system detects a temperature 60 C lt NIT GAWESTERN CO fi BS Rev 1 2 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS WRM30 User Manual VA SS 18 03 201 4 WRMB30 has got an automatic detection of battery voltage which is executed at power on consequently it sets the proper charging parameters as described in table 1 Battery voltage measured at startup Detected nominal voltage 10 0V lt Vise lt 16 0V Battery at 12V 20 0V lt Vos lt 32 0V Battery at 24V 40 0V lt Vise lt 64 0V Battery at 48V Tab 1 Recognition thresholds of battery nominal voltage If the battery voltage does not fall in one of the bands on table 1 WRM30 will report the error E03 see Alarms and errors of the system charging and load will be deactivated If this error appears check for proper voltage of the battery bank then re execute the start up t The jumper is made with a conductor having a section of at least 2 5 mm2 Never exceed the PchMax for each channel The load has got the positive terminal in common with the positive of battery while the minus is switched through the internal switch never connect the minus of the load with the minus of the battery Choice of PV module Thanks to its charging circuit with MPPT WRM30 charge controller allows the use of a wide range of PV modules ensuring the optimal exploitation of the whole power The PV module m
18. inal voltage can be repeated see Views point 1 b This document is the property of WESTERN CO Srl All rights are reserved Reproduction and use of information contained within this document is forbidden without the written consent of WESTERN CO Srl i NPA Rev 1 2 AZWESTERN CO i BS ev 1 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS W R M 30 U se r M a n u a l VA SS 1 8 03 201 4 3 Verify that in the main page or in the one dedicated to the reading of battery temperature see Views point 5 the battery icon and the C symbol are not flashing this to indicate the correct connection of the voltage probe and the battery temperature 4 With the PV module exposed to sunlight check that WRM30 charges the battery going to read the charging current Icha cng See Views point2 5 Check the proper power ON of the load If the load is ON only during night you can simulate the night by disconnecting temporarily one of the wires of the PV module Otherwise you can set temporarily the load programming at 24h 24h see System configuration point 5 6 With the load ON check the current absorbed by it reading the parameter lioan in the proper page of LCD see Views point 7 WARNING To turn off the system please follow these steps 1 Disconnect PV modules 2 Wait 30 sec until in the display disappears the animation inside the battery icon fig 3 charging current indicator 3 Disconnect battery I
19. nter is reset to zero It displays the voltage on the module of channel B Vargs The other indications of the main page remain except the animation of the PV module current Pressing this button it appears temporarily the reference to the displayed channel in this case c b that is the value is relative to channel B It displays the current delivered by the single module of channel B lens The other indications of the main page remain except the animation of the PV module current Pressing this button it appears temporarily the reference to the displayed channel in this case c b that is the value is relative to channel B It displays the power of the module of channel B Pans The other indications of the main page remain except the animation of the PV module current Pressing this button it appears temporarily the reference to the displayed channel in this case c b that is the value is relative to channel B It displays the counter of energy supplied by the module of channel B Eng The other indications of the main page remain except the animation of the PV module current Pressing this button it appears temporarily the reference to the displayed channel in this case c b that is the value is relative to channel B Pressing this button for 1 sec this energy counter is reset to zero From this page pressing this button you return to the main page Pressing and holding for 1 sec this b
20. odule while charging and towards the load By pressing this button it appears temporarily the current end charge voltage it is function of detected battery temperature evidenced by EoC c Pressing and holding for 1 sec this button it occurs temporarily the system nominal voltage 12V 24V 48V evidenced by SYS and then the value in Volts Here you can also see the indication concerning the use of local battery voltage two bars near the battery symbol or remote two bars far from the battery symbol It displays the total charging current of both channels kna lchg Other indications remain the same of the main page with only the animation of the current in charge WESTERN CO ELECTRONIC EQUIPMENTS SOLAR SYSTEMS ii BS Rev 1 2 WRM30 User Manual AIN 18 03 2014 SEAL neon Ld g Laf KWh By pressing this button it appears temporarily the reference to the displayed channels in this case cAb that is the value is related to both channels A B It displays the total charge current of both channels P na Peng The other indications of the main page remain with only the animation of the charging current Pressing this button it appears temporarily the reference to the displayed channels in this case cAb that is the value is relative to both channels A B It displays the counter of total charge energy of both channels Ecna ecng The other indications of the main page
21. ts PP dP dP do fl Charge voltage at 25 C SEAL program Vee ma as se lv Charge voltage at 25 C FLOOD program Vec mev 296v 592v v Charge voltage Li program Vec 140 147 280 294 560 588 v VEoC compensation according to battery Vtadj 0 024 0 048 0 096 v C temperature Tbatt i i Voltage of Floatphase at25 C Va eons f vecs veocaa vV Time of Absorption phase settable Tms 1 4 8 1 4 8 41 4 8 h Low battery voltage settable 10 80 11 60 12 56 21 60 23 20 25 12 43 20 46 40 50 24 defa utt defa uti ANI Rev 1 2 WGWESTERN CO i ev 1 ELECTRONIC EQUIPMENTS SOLAR SYSTEMS W R M 30 U se r M a n u a l WA AS 1 8 03 201 4 default 4 default 4 default Voltage of day detection V oo EG EE ee w Se 060 7 4 35 eee mA eo Section at Load terminals Weight Protection degree 1 With Li program the end charge voltage does not change when the measured temperature changes Table 4 electrical features Graphs s20 areo F a580 ff A H 62 40 31 20 Fa a S a a D E E 61 60 30 80 15 40 eepe ie ee D i i i i i i i 60 80 30 40 15 20 pe bi E A a SEE SE EE Sn i i i i i i i i i 9 60 00 30 00 15 00 Haaa E fm e e 59 20 29 60 14 80 Hee e ee en e e a i i i H H i H H i i i H H i 5 58 40
22. ure there are not specific cable glands they must be anchored with cable ties on those of battery ref page 2 point 2 Wiring diagram T E BATTERY a egra me S A HAE PV CHARGE CONTROLLER E saTtery e eS O ie Q g 9 Q OC AZERA VAA Recommended section pairs of copper cable that guarantee a maximum voltage drop of 3 of the battery nominal voltage Max distance per Cable section couple m Fa 12V 26 2 Max distance per Cable section couple m E 24V 26 2 33 5 Max distance per Cable section couple m Fg 48V 26 2 Table 3 Choice of cables section Bw lt SWESTERN CO 33 5 33 5 BATTERY STACK Fig 2 Wiring diagram System testing Once made the connections as shown in Fig 3 it is necessary to test the system 1 At power on the display will temporarily indicate the firmware revision see System configuration point 1 and soon after it will show a screen with the detected nominal voltage of the system see Views point 1 b 2 Make sure that the read voltage corresponds to that of the system The displaying of the system nom
23. ust be selected according to the nominal battery voltage and respecting the constraints of the panel input of WRM30 The below reported table 2 gives an indication of the recommended ranges that are accepted in input on each PV channel of the charge controller Nominal battery voltage Pe Features of PV strings 25 c per channel Vmp Voltage at maximum power 15 0V lt Vmp lt 30V Voc open circuit voltage lt 40V Pmax Max power lt 225W N s number of cells in series 36 lt N lt 60 Vmp Voltage at maximum power 30 0V lt Vmp lt 60V Voc open circuit voltage lt 80V Pmax max power lt 450W Nes number of cells in series 72 lt Na 112 Vmp Voltage at maximum power 60 0V lt Vmp lt 120V Voc open circuit voltage lt 140V Pmax max power lt 900W N s number of cells in series 144 lt N s 168 Table 2 Selection of PV strings 1 r pe Values refer to mono or poly crystalline silicon PV modules Installation 1 Install WRMB30 in a dry and adequately ventilated place fixed on a non flammable surface and positioned so as to leave an unobstructed space of at least 10cm in the neighbourhood of device that allows the cooling for natural air convection or forced by the internal fan 2 Remove the front cover to access to electrical connections see fig 4 3 Connect in order load sensor for measure of battery temperature and voltage included PV module and finally the battery as in the diagram fig 2 At batt
24. utton you go back to the main page from any other page If you do not press any button for 2 minutes you go back automatically to the main page from any other page This is also true in the environment of Configuration see next paragraph t Animations on the first page appear in the following cases the animation panel current only if it is day the animation charging current only if the charge is on the animation Load current only if the output is on This information is also shown on the first page but with a lower frequency of flashing The current and power of the module for each channel Ichx are not directly measured but they are recalculated internally system configuration SEQUENCE OF PAGES FOR SYSTEM CONFIGURATION a Pressing for 1 sec these buttons from any display page you go to the configuration pages It displays the firmware revision of the charge controller 6 Pressing this button for 1 sec all internal counters of NCiclit NLowBattt NOverLoad NOverTemp ContaOre are set to zero except energy counters It sets the charging voltage for battery The displayed voltage refers to the end charge voltage at 25 C Pressing this button you can modify the setting Pressing this button for 1 sec you select the default value FLOOD program has to be set for the charge of flooded lead acid batteries SEAL program has to be set for either GEL or sealed batteries default LEO program
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