Thanks @movement19 - It's great with all the new low-power devices, etc. My camper has a couple hundred watt panels on it with 200 or so amp hours worth of batteries - that setup will charge anything I throw at it - all day long .. laptops, usb battery packs, 20v tool battery packs, phones, etc .. I've never seen the battery get low. Some people are using propane fridges from campers for lightening the load on startup solar systems too.