500 Watt Solar Charge Controller
Handles up to 30 amps of solar    Prevents battery back-drain through panels at night    Reduces overall system maintenance    Protects battery against temperature overage    For use with solar arrays typically 15-22 volts, 25 volts maxFor use with 12V solar panels and batteries only.Overall dimensions: 8.8" L x 10.2" W x 2.2" HShipping Weight: 0.85 lb.