BBBBeeeeccccoooo Energy Solutions Datasheet Solar Shunt Regulator BR1/12/6 Low power consumption <1mA Fully encapsulated Stainless steel heatsink / mounting plate Rated to 6A 12V Nominal Voltage Temperature compensated Status indication (shunt) Solid state Small & simple to fit Low cost Safely paralleled Blocking diode included BR1 Data sheet March 2013 Page 1 of 2 01/07/13 Functional Description The BR1 is a shunt regulator designed to limit the maximum voltage to which a lead acid battery can be driven when on charge from a photovoltaic (solar) module or array. It is a simple, low cost, solid state device for use with photovoltaic modules having a peak current not exceeding 6A. The unit has very low power consumption and features a single green, status indicating LED, which is illuminated when the battery voltage has reached the set-point and the module output is being shunted. The circuit for the regulator (shown in the diagram opposite.) comprise three main elements, a voltage comparator, a semiconductor switch and a blocking diode. The purpose of these elements is as follows: Voltage Comparator The battery voltage is constantly compared with an internal reference level and when it reaches the set-point the semiconductor switch is triggered. The reference set-point voltage is automatically adjusted upwards at lower temperatures and downwards at higher ones. Semiconductor Switch 63 When triggered the switch shunts the solar module/array, diverting its output away from the battery. When the battery voltage has decayed by 1.3V the module/array output is reconnected to the battery. 38 40 18 BR1 PLAN VIEW Blocking Diode This is an electronic non-return valve and serves two purposes. Firstly it ensures the battery cannot discharge through the module/array at night and secondly that the battery is not shorted 5 DIA when the regulator shunts the module/array. ALL DIMENSIONS IN mm Detailed Description 1) The regulators PCB is encapsulated in polyurethane within a black ABS box measuring 40(L) x 40 (W) x 20 (H). This assembly is fastened to a 1mm thick stainless steel heatsink measuring 71 (L) x 37 (W). 2) The heat sink also enables the unit to be easily Colour Code - SOLAR +ve YELLOW mounted via four 4.5mm DIA holes. COMMON -ve GREY BATTERY +ve BROWN 3) The unit is rated at 6A and will easily handle the Nominal Voltage (V) 12V output from one MSX-83 module. Shunt Set-Point (V) 14.5 4) The shunt set-point is fixed at 14.6V (nom 12V) Reconnect Voltage (V) 13.2 with reconnection at 13.2V Diode Voltage Drop (V) 0.4 Temperature Coeff. of Voltage (mV/C) -10 5) The ends of the three 120mm leads (SOLAR Input Current (max) (A) 6 POS, BATTERY POS and COMMON NEG) are Typical Consumption (mA) <1 paired back for testing and can be terminated with a variety of connectors or left bare to suit the user. Specifications subject to change without notice Beco Limited, 1, 2 & 3 The Alpha Centre, Babbage Road, Totnes, Devon, TQ9 5JA t. 01803 833636 f. 01803 862829 e. info becouk.com www.becouk.com BR1 Data sheet March 2013 Page 2 of 2 01/07/13