Solar controller will optimize the photovoltaic module energy output to store in the battery as well as increase battery life by not overcharging it. MPPT solar charge controller is an intelligent controller which regulate the working voltage of solar panels, to achieve maximum power from solar panel Current Rating: 20 / 30 A Voltage Rating: 12 / 24 / 48 V DC Measurement (L x W x H): 80 x 70 x 35 mm Net Weight (g): 260 g