SUNSHINE SOLAR 1 x Solar Panel 10 amp Dual Charge Controller. Our latest Dual-battery charging solarcontroller eliminates the added cost of two separate solar charging systems. The controller uses Pulse Width Modulation (PWM) the most effective means to achieve constant voltage battery charging, the result is a higher charging efficiency, rapid recharging and healthy batteries at full capacity.This controller is ideal for use with motorhomes, caravans, boats or anywhere there are two independent batteries for instance a starter battery and a leisure battery. The Charging percentagesfor each battery can be set manually if required. Features. Maximum Solar Input Power: 120 Watts @ 12V - 240 Watts @ 24 Volts. Battery type selection: Sealed, Flooded or Gel. Two battery charging priority (from 0-100%). Battery temperature sensor. PWM charging, different frequency option. Over charging, short-circuit, reverse polarity & reverse current to PV Protection. Intended use: For use with soSUN lar panels up to a maximum of 10A