Our inverter based solar hot water system brings together a dedicated 1500w modified sine wave inverter, our intelligent controller, and a remote control panel that allows you to define the on/off water temperatures, and the cut-in/out battery charge levels. It also has a sensor to detect the solar panel output so that it can only switch on if there is enough solar energy! This solution avoids the need to change the existing heating element and means that when on shore power all works as currently.