The SPPL-SPS1224 is suitable for small business, commercial and residential installations. The Panel capacity can be up to 800W for a 12V system and up to 1600W for a 24V system. The Power Steering automatically detects the system input voltage when the battery is connected. Note: The battery must be connected first and then the Solar panels. Convert any UPS/Inverter to a Solar PCU by adding this as a card inside or a box outside. Only unit in India with all power parameters being displayed on a LCD. Only unit in India where you can customize the LCD display to show your name – make it your own product and brand. Can be programmed by a USB dongle by inserting it into the LCD connector on the board. Simple terminal program with simple instructions make it very easy to customize Electrical Parameters 12V DC 24VDC Nominal System Voltage 12 V DC Auto Select 24 V DC Auto Select Rated Battery Current 30/60A 30/60A Rated Load Current 30/60A 30/60A Maximum Battery Voltage 14.1V 28.2V Maximum Solar Input Voltage 42V 84V Maximum PV Input Power 800W 1600W Fan control Auto ON/OFF Auto ON/OFF