I am sure this is as good as it gets in solar backup. I am a little disappointed in the lack of human assistance. I am a novice in solar. I learned unfortunately that as as one in his seventies this may not be the best option. I am about to sell the entire package before adding more cost with roof panels and the switch needed. Leaning toward a standby generator with people who I can talk to without excessive research.

Very impressed with F 3800, works just the way it’s supposed to. Tested customer service just as I did equipment and found them to be very responsive both times I called. Second order in transit and scheduled to be here this week

We bought this system specifically to keep food from spoiling during an extended power outage as well as having light at night and keep a phone charged. First, the good stuff. Product is built like a tank and functions well. Ran my freezer continuously from 100% to 15% charge in 32.5 hrs, fridge from 100% to 15% in 29 hrs, and both simultaneously from 100% to 15% in 28 hrs. Recharged each time to 100% from house power in about 2 hrs. By managing power usage appropriately, you could keep food cold and frozen during a power outage for several days before having to recharge. Unfortunately the rate of recharge using a single 400W solar panel is so slow as to be impractical. You WILL NOT get 400W out of this panel and you WILL NOT be able to recharge the unit in a single day of sunlight, at least not during the winter months when outages are most common here. AT A MINIMUM this system requires two 400W panels and there is a reason why it’s built to accommodate four. But Anker does allude to this in their advertisements, you just have to pay attention to what they’re saying.

As luck would have it, I needed my battery the day after I bought and fully charged it. Wow! It was great. I love the app that shows me draw and the length of battery life. It's easy to use. I do wish an owner's manual came with the battery and solar panel. If you don't have internet or cell access due to a power outage, it does you no good not to have a manual. I have been researching power units and solar storage for over two years. This is the unit I chose among all of the options out there. US Based customer support who clearly speak English. The legs on the solar panel could be a bit sturdier and a third in the middle of the panel could be added, but it is a really nice panel that works well.

Wanting a second f3800, waiting for black Friday