Solar Panel Charge regulator. Regulates the charge put in to your batteries from the Solar Panels. Can be used in conjunction with one or two panels. This regulator is equipped with a parallel connection so as to make connection to the engine battery (in addition to the leisure battery) possible. The engine battery is loaded only after the leisure battery (s) has been fully loaded. Thanks to an innovative electronic system, there is no warmth dissipater (as is the case with traditional regulators). The highest performance is therefore guaranteed. The Powermaster also has a switch for acid/gel batteries.