Solar Charge Controller Maximum Current 40 A Maximum Solar Input Voltage 24 V DC Maximum Battery Charging Voltage 24 V DC Battery Type Flooded Lead Acid Gel Cell Lithium-Ion Sealed Lead Acid IP Rating IP32 Maximum Operating Temperature 113 Degrees F Minimum Operating Temperature -31 Degrees F Overall Depth 6.3 in Overall Height 2.3 in Overall Width 4.6 in Interface Bluetooth No-Load Loss 12 mA @ 24V 8 mA @ 12V Compatible with Brand Grape Solar