sbc-7100 user manual..
Contents
1. Equalization Charging 12V DC Load rated current 8A SBC 7108 12A SBC 7112 7120 e PY Panel Open Circuit Voltage 17 23V Short Circuit Current To AC on _ 10A SBC 7108 14A SBC 7112 22A SBC 7120 Inverter 12V Battery Figure 2 Connection of PV Charge Controller This controller has Electronic Blocking feature therefore it is not necessary to connect a diode between the PV module and the Controller The recommended wire size is 12A WG SBC 7108 7112 10AWG SBC 7120 It is recommended that the PV Charge Controller should be installed in a dry sheltered location away from sources of high temperature and moisture 3 2 LED Indicator Battery Voltage is lower than 12 6V Battery Voltage has reached Low Voltage Disconnect LVD Battery Voltage is higher than 12 6V Fully Charged Voltage Setting and load has been disconnected P 3 Table 1 LED Indications 3 3 LCD Display The LCD Display shows the battery voltage PV panel voltage and the charging modes during normal day time operation At night time or low sunlight or PV disconnected situation display of PV VOLT value is to be ignored LCD DISPLAY Descriptions BATT VOLT Shows the Battery Voltage PV VOL errr eer Shows the PV panel Input Voltage to the system PV CURR esccceusnsatneieotss Shows the PV panel Input Current to the system TOD PV ATi pcosconesenceees Shows the total Ampere Hour input to the system in cur2. ON OFF Dip switch 2 OFF Dip switch 1 OFF Dip switch 3 ON ON ON Dip switch 2 OFF Dip switch 1 OFF Table 4 Dip Switch Functions P 6 4 PV Charge Control Mode The SBC 7100 Series PV Charge Controller can operate in the several modes This includes the 3 stage Charge Control Equalization Charging Mode DC Load Control Mode NIGHT LIGHT mode Temperature Sensing and Over Temperature Protection features 4 1 3 Stage Charge Control The main function of charge controller is to regulate the flow of electricity from the photovoltaic panels to the batteries In PV systems with batteries the batteries must be protected from overcharging and be maintained at fully charged state The PV Charge Controller uses the Micro Processor and PWM Pulse Width Modulation to give optimal and safe charging It makes varying On Off pulses of electrical energy from the photovoltaic PV panel in charging the battery according to the battery state It has 3 stages of charging as follows a BULK CHARGE At this mode a preset maximum constant amount of current amps 1s fed into the battery as the no PWM is present As the battery is being charged up the voltage of the battery increases gradually b ABSORPTION CHARGE After the preset voltage is reached approximately 14 3 volts for a 12 volt system the voltage is then held constant As the battery continues to be charged at constant voltage the charging current decreases The
3. CH volt Adjustable range is 12 0 16 5V If out of this range it will restore to factory preset Float Voltage Float CH volt Adjustable range is 12 0 16 5V If out of this range it will restore to factory preset Low Voltage Disconnect LVD volt Low Voltage Reconnect LVR volt Night Light Mode 10 Selections see section 4 3 3 for more details Switch the dip switch 2 to ON position Exit Setting Mode and resume to normal operation gt indicates each subsequent press of Reset button Figure 5 Adjustable parameters in Setting Mode 3 4 2 Select the Auto Equalization Charging and Night Light Mode The dip switch 3 is for Night Light Mode switch 2 for Equalization Charging mode and switch l is always set at off position THE PV CHARGE CONTROLLER IS FACTORY PRESET FOR USE WITH SEAL TYPE BATTERY THAT IS NO AUTO EQUILIZATION CHARGING BECAUSE DIP SWITCH 2 IS AT ON POSITION Equalization Eq charging is only for wet type Lead Acid Battery When Auto Equalization Charging is set at ON mode Equalization charge will occur for 2 hours once every thirty days Use the dip switch to select equalization charging and night light mode as below AUTO Equalization Night Light Mode Dip Switch Settings Charging cm v Dip switch 3 OFF OFF a Dip switch 2 ON OLO Dip switch 1 OFF LEreset Dip switch 3 ON OFF ON Dip switch 2 ON Dip switch 1 OFF Dip switch 3 OFF
4. Connection Terminal 5 Informative LCD Display and Tri Color LED indication of system and battery conditions Optional Temperature Sensor for compensated battery charging Optional Remote Signal Terminal Control and Indicator The following diagram shows the hardware interface of the PV Charge Controller PV CHARGE CONTROLLER BATTERY STATE Red BAT V lt 12 6V i PODA ONLY FOR 12V PV SYSYEM Green BAT V gt 12 6V DC LOAD i O Green BAT V Bulk BATT X Charging V BAT Full E N of O Orange BAT V lt _ LVD V Load Cut Off ok WET TYPE BAT ONLY Smajo o ooo o Equalization Charging CIC lt Figure 1 Front view of PV Charge Controller Battery LED Indicator LCD Display Reset button see Section 3 4 Temperature Sensor Optional 12V DC Load terminal with Low Voltage Disconnect NIGHT LIGHT mode Section 4 3 12V Battery connection terminal PV Panel connection terminal Remote Signal Terminal Optional P 2 3 Installation and Indication 3 1 Connection The PV Charge Controller should be connected as follow PW CHARGE CONTROLLER ee 10 Red BAT V lt 12 6V Red BAT V LVD ONLY FOR 12V PV SYSYEM Green BAT V gt 12 6V DC LOAD o m Green BAT V Bulk c BATT Charging V BAT Full ZIN O Orange BAT V lt f e a ym LVDV Load Cut Off D O T O Q qey WET TYPE BAT ONLY Smia O O OO O
5. High Low control signal 12V OV up to 1A synchronized with Night Light mode Shows the battery status Red LED See Section 3 2 Shows the battery status Green LED See Section 3 2 Table 7 Pins configuration Note Pin 3 and 5 are not used in Remote signal Terminal Rev 1 0 11 2004 7673 7112 0563 END
6. temperature protection Battery charging float voltage setting Adjustable from 12 0 16 5V i P Battery charging bulk voltage setting Adjustable from 12 0 16 5V DC load control mode For DC load terminal Low Voltage Disconnect LVD Adjustable from 8 16V Low Voltage Reconnect LVR Adjustable from 8 16V P 1 i Introduction The SBC 7108 7112 7120 PV Charge Controller is designed for use with all types of 12V photovoltaic PV panels systems and different types of 12V batteries such as wet or sealed lead acid lead calcium lead antimony battery Numerous features are provided to maximize the performance of the system N A ee Electronic Blocking To protect against reverse polarity connection of PV panel and block current from battery to PV Panel when voltage of Battery is higher than PV panel Suitable for PV panels with Open Circuit Voltage from 17 to 23V Rated charging load current 8A SBC 7108 12A SBC 7112 20A SBC 7120 PWM Charging with 3 stage Charge Control to allow battery be left unattended for long period User Adjustable Charge Control Settings for different types of batteries User Adjustable Low Voltage Disconnect and Low Voltage Reconnect Build In Microprocessor for PV charge control to maximize the charging efficiency Overcharge and Over discharge Protection Over Temperature Protection Short Circuit Protection at load terminal 4 amp Battery Reverse Polarity Protection at Battery
7. Float Voltage cccccccccccccccecceseessssssesssseneeees 13 5V Low Voltage Disconnect cc00ceeeeeeeeees 11 5V Low Voltage Reconnect ccccccceeeeeeeees 12 5V Night Light Mode Option ccccccceeeeeees Off refer to Table 5 in Section 4 3 3 Table 3 Preset values of the adjustable parameters The preset Bulk and Float Setpoints are for typical Sealed Gel type Lead Acid Battery only For typical wet type Lead Acid Battery set Bulk setpoint to 14 8V and Float setpoint to 13 5V Please refer to battery manufacturer s specific recommended values Adjust the charging voltage battery protection and night light mode duration settings 1 Make sure all the dip switches are switched to OFF position Section 3 4 2 table 4 2 Disconnect the negative terminal of the battery from the PV Controller 3 Press the Reset button and keep the Reset button being pressed At the same time connect the negative terminal of the battery back to the Controller 4 When the LED is flashing green release the Reset button as Setting Mode has been entered 5 Each subsequent press of the Reset button will move on to the next setting in the cycle as shown in Fig 4 6 You can press the Set button 1 and 2 to adjust the desired setting 7 When all the desired settings are done switch the dip switch 2 to ON position to store the new settings and resume to normal operation Then switch the dip switch 2 to OFF P 5 Bulk Voltage Bulk
8. PV Charge Controller SBC 7108 7112 7120 User s Manual NOTE Please note that features like LCD read out of AH logging of 3 days see Section 3 3 and 10 Night light mode see Section 4 3 are available for products manufactured after Oct 2004 PY CHARGE CONTROLLER oe O Red BAT V lt 12 6V O Koi BAT VR ONLY FOR 12V Pv SYSYEM Green BAT V gt 12 6V DC LOAD nr et Green BAT V Bulk BATT HE Charging V BAT Full E Orange BAT V lt of V LVD V Load Cut Off D D WET TYPE BAT ONLY Omina O O O O Equalization Charging Table of Contents Precautions and Specifications 1 Introduction 4 PV Charge Control Mode 4 1 3 Stage Charge Control 4 2 Equalization Charging Mode Automatic or Manual 4 2 1 Automatic Equalization Charging 4 2 2 Manual Equalization Charging 4 3 12V DC Load Terminal Control Mode 0 FHAIAYIAIAAAAAARA AHP SH HWW WN VN Precautions 1 Before using the charge load controller read all the instructions and cautionary markings on the charge load controller the batteries and the photovoltaic panels 2 Do not attempt to repair the controller Incorrect re assembly may result in a risk of electric shock or fire 3 To reduce risk of electric shock disconnect all wiring before attempting any maintenance or cleaning Turning off controls will not reduce this risk PV panels produce power when exposed to light cover th
9. charging voltage is held at the Bulk Voltage Setting for one full hour with various rapid On Off pulses PWM It then switches to Float Charge Mode c FLOAT CHARGE The controller will maintain the battery voltage at the float voltage setting by giving shorter On pulse charge to make up for any detected self discharge of the battery When the battery voltage drops below the Float Voltage Setting for a total period of 10 minutes a new charging cycle is activated in Bulk or Absorption Charge The three stages charging method works well with the chemical reaction that occurs as a battery is being charged When a battery is more discharged a regulated maximum current can be applied since there is a lot of material available for the reactions to occur As the battery refills less and less chemical material is available for the reaction By using PWM to slowly reducing the charge current while maintaining a preset high voltage the battery is more closely refilled at the reaction rate of the chemicals Finally the Float voltage keeps the battery fully charged at all times taking care of the self discharge Remarks 1 When the Battery is charged up to Bulk Charge Voltage setting the LCD will only show the Bulk charge voltage one or two times quickly then the PV controller switches to Absorption charge 2 The Batt Volt display during Absorption charge is less than Bulk Voltage Setting The difference will decrease as the Absorption time
10. disconnected When the temperature has dropped to the working range the PV panel and the load will be connected again 5 Remote Signal Terminal Optional The PV controller has a remote signal output terminal Optional which can 1 control the ON OFF operation of equipment such as inverter hooked up to the battery bank to operate along with the night light mode program and share the safeguard function such as low battery disconnect and reconnect 2 make extension connection of the battery status LED to allow remote monitoring Battery bank status see Section 3 2 P 10 Activate the feature Please follow the steps below 1 Open the case of the controller there should be a small control board near the Remote Signal Terminal as shown in figure 6 Figure 7 2 On the small control board there is a sky blue color dip switch Turn the dip switch 1 and 2 to ON position as shown in figure 7 RT A 7 Tw a 4541 7112 2012 3 REU O my CONS i nas i 7 CON4 A E MASSUSE tac 3 005 125 A rc Figure 8 Connection Use the RJ 45 connector 8 pin to control ON OFF of the LED and Equipments The pins configuration and connection are as follow RJ 45 PIN PIN Remote ON OFF Control of Equipment Connected to Battery 87654321 Remote RJ 45 Remote Signal Terminal Figure 10 Connection diagram of RJ 45 to Equipments On Off Control Signal synchronized with Night light Mode
11. em with opaque material before servicing 4 Working in Vicinity of a Lead Acid Battery is dangerous Batteries generate EXPLOSIVE gases during normal operation Provide ventilation to outdoors from the highest point of the battery compartment 5 This charge load controller is intended to be used with a battery supply of 12 VDC nominal voltage 6 Be extra cautious to reduce the possibility of dropping a metal tool onto batteries It might spark or short circuit batteries or other electrical parts that may cause explosion Cover wrench handles with plastic tape or vinyl dip coating material Specifications SBC 7100 Series Models 7108 7112 7120 Battery voltage 12V Maximum PV panel open circuit voltage 26V Continuous load charge current 12A Maximum charge current 5 mins Maximum load current 5 mins Operation current no Load and no PV Voltage across terminals PV to Battery Voltage across terminals Battery to Load Electronic Blocking To protect against reverse polarity connection of PV panel and to block current from battery to PV panel when voltage of battery is higher than PV panel Battery reverse polarity protection Overcharge amp Over discharge protection ii avel a Battery status LED indication 5 State LED Indications Charging status indication 3 State LCD Display Recommended wire size 12AWG Weight 0 47kg Dimension WxDxH 150 x 85 x 45 mm Fuse 15A 20A Operating ambient temperature 10 to 50 C Over
12. et light It prevents over discharging the battery and has 10 Night Light timer programs 4 3 1 Low Voltage Disconnect LVD When the battery voltage 1s lower than the Low Voltage Disconnect LVD setting the LED will blink orange once every 2 seconds After it has flashed several times up to 5 the load will be cut off After the load is cut off user can press the Reset button once to switch on the load fora grace period of 10 minutes for emergency purpose 4 3 2 Low Voltage Reconnect LVR When the battery voltage is higher than Low Voltage Reconnect LVR setting the controller will automatically reconnect the load 4 3 3 NIGHT LIGHT Mode Programs In the night light mode we have 10 selections To Activate the NIGHT LIGHT Mode switch the dipswitch 3 to ON position After activating when the PV panel voltage is lower than 3 5V for 10 minute the Controller will turn on the light for a preset period of time according to the option selected When the PV panel voltage is higher than 3 5V for 1Ominute the Controller will turn off the light In NIGHT LIGHT Mode press and hold the Reset button can switch on the Light to test the light P 8 Also when the battery is lower than the Low Voltage Disconnect LVD for 2 minutes the load will be cut off When the battery voltage becomes higher than Low Voltage Reconnect LVR setting the controller will automatically reconnect the load again The following chart shows the night
13. increase 3 The Batt Volt display during Float Charge is less than the Float Charge Voltage Setting P 7 4 2 Equalization Charging Mode Automatic or Manual WARNING Equalization Charging is only for Wet type Lead Acid Battery The Equalization Charging Voltage is factory pre set to the Bulk Voltage 1 Volt The battery manufacturer should be consulted Clean distilled water will need to be added to the battery AFTER the equalization process 4 2 1 Automatic Equalization Charging Automatic Equalization charge is only available when battery voltage is higher than the Low Voltage Disconnect LVD voltage see 4 3 1 To set Automatic Equalization Charging set the dip switch 2 to OFF position The PV Charge Controller will perform Equalization charging for 2 hours once every 30 days During equalization charge it can be stopped any time by pressing the Reset button once and the controller will return to the charging mode before the Equalization charge 2 2 Manual Equalization Charging Set the Night Light Mode dip switch 3 to off position Press and hold the Reset button for 10seconds and the equalization charge will go on for two hour During equalization charge it can be stopped any time by pressing the Reset button once and the controller will return to the charging mode before the Equalization charge 4 3 12V DC Load Terminal Control Mode The 12V DC load terminal is designed for low power DC load such as stre
14. light mode selections LCD Display Explanation SUNSET NIGHT SUNRISE OFF OFF 2 HR ON 2 HOURS ON 4 HR ON 4 HOURS ON 6 HR ON 6 HOURS ON 8 HR ON 8 HOURS ON 10 HR ON 10 HOURS ON 3 OFF 1 3 OFF 1 4 OFF 2 4 OFF 2 6 OFF 2 6 OFF 2 DK DN Dusk to Dawn Table 5 DESCRIPTION OFF Load remain turned off X Hours On Load is turned on for X hours after sunset Y OFF Z Load is turned on after for Y hours after sunset turned off during the night then turned on again Z hours before sunrise Dusk to Dawn Load is turned on all night Measure Night Length The load timer options that turn the load on again before sunrise require that the PV charge controller to measure the length of the night The default value of night length is 12 hours after installation or disconnect then reconnect the battery The local length of night will take the moving average of 4 consecutive nights If the solar array is disconnected during service the controller will then record premature night duration This wrong night length data will be outdated after another 4 days of normal service Alternatively the above error can be corrected by disconnect then reconnect the battery Verify Night Light Mode selection To verify the night light mode selection During night light mode press the reset button once The green LED will flash once per second Count these LED flashes to confirm the correct selection Each of the 10 night ligh
15. rent day LUD PNV ATA seciiversscsccass Shows the total Ampere Hour input to the system a day before L2D PV_AH 0000000000 Shows the total Ampere Hour input to the system 2 days before Charging Status BULK CHARGE Shows the charging process is in Bulk charge ABSORB CHARGE Shows the charging process is in Absorption charge FLOAT CHARGE Shows the charging process is in Float charge EQULIZ CHARGE Shows the charging process is in Equalization charge PV lt BATT VOLT Indicates the PV voltage is less than the Battery Voltage Table 2 LCD Display 3 3 1 LCD Display Sequence Sequence starts here Initialisation Version No or BATT VOLT 00 0V PV VOLT 00 0V gt PV CURR 00 0A Brand Name Pa t L2D PV_AH 000 0 4 L1D PV_AH 000 0 4 TOD PV_AH 000 0 Figure 3 The LCD Display Sequence According to the Charging Status as shown in Table 2 P 4 3 4 The Dip Switch Set Button and Reset button functions The dip switch set button and reset button are used for adjusting the PV Charge Controller Settings see Section 3 4 1 and 3 4 2 3 4 1 Adjust the PV Charge Controller Settings SET button 1 SET button 2 DIP Switch 1 2 amp 3 RESET button Figure 4 Temperature sensor Factory Preset The following table shows the factory preset values of the PV Charge Controller Bulk Voltage ccccccceesssssstceeeeeeeeeeeeeees 14 3V
16. t mode options has a unique number of flashes These are as follows Switch Setting of Flashes OFF 0 2 Hours On l 4 Hours On 2 6 Hours On 3 8 Hours On 4 10 Hours On 5 3 OFF 1 6 4 OFF 2 7 6 OFF 2 8 Dusk to Dawn 9 Table 6 Note Do not press the reset button when the LED is flashing during the verification 4 4 Temperature Sensor Optional When an external temperature sensor optional accessory is installed the controller will adjust the Bulk and Float Charge Voltage according to the temperature of the battery type The regulation setpoint is 25 C The Controller adjusts the BULK and FLOAT setpoints 0 03 V C Only the factory provided temperature sensor optional accessory can be used If no temperature sensor is installed the controller will set the temperature of the battery at 25 C gt m pa Pudi I mih E E F 4 k J C i on iad Y k ES r 2 w E A i te Temperature Sensor Connection Terminal Stereo Jack Figure 6 4 5 Over Temperature Protection The operation temperature of the transistors of the PV Charge Controller is also continuously monitored If excessive temperature is detected the charge controller transistors will repeatedly and rapidly turn On and Off to reduce the charging rate so as to reduce the transistors temperature In case the charging current from the solar panel is reduced to zero and over temperature condition still persists the load will also be
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