If you have a battery hooked up to a solar cell for recharging purposes, you will need to manage the current between the two. A charge controller prevents batteries from overcharging and discharging when connected.

Specifications:

• Input voltage solar cell panels 14-22v DC open circuit voltage, nominal voltage 12v DC
• Max. input current 5A
• Inrush voltage battery voltage
• Interrupting voltage battery voltage > approx. 13.9V
• Displays 1 LED for charging