My son gave me out of his 2007 Beaver his Magnum ME 2012 Inverter charger. He upgraded to a solar system. I have a 2004 Gulfstream Cresendo, that we realy like. Only 65,000 miles so far. Was thing about installing the unit. I also have the inside pannel with the unit. Is it worth the trouble or sould I just sell the unit. We do some dry camping 4 to 5 times a year. Just looking for some advice.