The Coleman 68032 is a 30A digital charge controller that goes between your solar panel and your 12V battery to prevent over-charging or over-discharging of your battery.Features and Benefits: Protect your battery from overcharge and discharge For use with 12 Volt solar panels and batteries only Handles up to 30 Amps of array current Handles up to 450 Watts of solar power Maintenance-free protection of your solar panel and batteries Maintain 12V batteries in a fully charged state Dimensions (L x W x H): 8 3/4" x 10 1/4" x 2 5/8" (22.5 x 26 x 6.5cm) Weight: 0.85 lbs Manufacturer's Part Number: 68032 Technical Specifications: Electrical Normal input (Solar cell array voltage): 17-22 volts Maximum input: 25 volts Maximum charging current: 30 amps Current consumption without battery: 35mA Max Current consumption without array: 25mA Max PWM constant voltage for gel cell battery: 14.1 volts ±0.4 PWM constant voltage for lead acid battery: 14.5 ±0.4 Float mode voltage: 13.4 ±0.4 Battery condition display LED color: Indicated range LOW (Red): 12.5 ±0.4 LCD Meter accuracy DC voltage: 1.25% LCD meter accuracy DC current: 3% Protection Over-temperature protection engages at (stop charging): >80°C (176°F) Over-temperature protection resets at (restart charging):