I have purchased 4 acres of sand and gorgeous scenery west of Hurricane, utah and just north of the north rim of the Grand Canyon. I have arranged for a well to be put in soon. However, I will be off the grid. I have three big German made solar panels. I have an inverter and plan to get some 12 volt batteries right away. But.......I have a question. If I gave the panels set up and the batteries in line what happens when I an not there to use battery power for say two weeks? The frig will be on the batteries but what happens to the excess power. Hum?