Solar controller will optimize the photovoltaic module energy output. Controller detects automatically battery voltage system. Controller can be selected for float or gel batteries. 3 LED shows state of charging indication. Full protection circuit with auto recovery after fault is rectified. Current Rating: 10 / 20 A Voltage Rating: 12 / 24 V DC Measurement (L x W x H): 115 x 91 x 48 mm Net Weight (g): 224 g