PowerMax PM3-75 110V AC to 12V DC Power Supply Converter Charger for RV 75 Amp Electronic current limiting automatically shuts down power during overload or short-circuit conditions Automatic 3 stage charging: 13.2 Vdc range "float" mode, 13.6 Vdc range "absorption mode, 14.4 Vdc range"bulk" mode. Quiet operation in a wide range outputs. Convenient deck mount installation UL Approved. 2 Year Warranty.