I'm looking into setting up a solar water heating system that is completely off grid. I'm single and live in small manufactured home. I mostly work and gone during the day so I use little water. I live in southwest Louisiana which rarely goes below freezing. I currently have an electric 4500 watt dual element 40 gal Rheem water heater model (E40 2 RH95). I know panels, LF inverter, charge controller and battery system would be expensive to run that. I'm looking at other cost effective ways. I'm open to any advice. thanks