Instapark INCC1205 12V / 5A Waterproof PWM Solar Charge Controller PWM (Pulse Width Modulation) technology with temperature compensation protects battery from over-charging 4-LED Battery charge status LED indicators Suitable for both sealed and flooded lead-acid batteries & automatic voltage detection, 12 volts only Maximum 5 amp under load, compatible with Instapark solar panels and many other manufacturers Includes a plug-n-charge connection cable for the Mercury27 solar charger