This module supervises the charging state of a 12 V car accu and starts charging automatically, whenever there is a drop of voltage. With full accus the module will switch off and supervise the accu. Suitable for accus placed in alarm systems, weekend-houses, caravans etc. in order to keep accus constantly charged without the risk of overcharging. Also suitable as charging regulator for solar surfaces. Short circuit and reverse current proof. Automatic charging interruption with accu voltage of approx. 13,8 - 14,2 V/DC.