I have a hobby Trailer that i have been working on in spare time.. I have 3k watt of solar on roof used few deep cycle batteries for testing.. bough my first two batteries right before Hurricane IAN hit.. I had not damage but power was out for about a week (my back up house gen blew a fuse) would be weeks till get a new fuse shipped.. I was able to run every thing off the solar and batteries.. very pleased with them will upgrade to all 8 for my system.