For the connection of a solar module up to 60 Watt. Protects the battery from overcharging and deep discharge, as the solar cell automatically charges the battery when the sun shines. LED for charging indicator. Attention: A separate battery monitor must be installed (81215) as deep discharge protection. Please order separately. Technical data: Automatic charging: Turns off at 14.2 V and on again at 13.8 V. Connection options for 1 solar module up to 60 watts. Short-circuit and reverse polarity protected.