Bests & Worsts Reviews from Amazon

I received a busted unit. Contacted support to no reply so I will be starting the return process. (Upgraded to 2 stars since I got in touch with support). Unit will not charge in the sun. I get an error 18 which I look up to be high temperature. The unit supposidly has an internal fan to cool but my fan does not activate, I do not know if I'm missing a button to turn the fan on or if it's supposed to just begin running automatically. I can't find anything in the manuals. UPDATE Finally got in touch with support on the phone and they weren't able to answer my question about the fan, but they believe it only works when the inverter is running, which doesn't help heat issues when the unit is sun charging. Day 1 charge - 92 degree day went from 37-48% before an error 18... unit took 6+ hours to cool down and was a brick that whole time (meaning the unit was useless, you wouldn't be able to charge anything with it while it cools down). Day 2 charge - 96 degree day went from 47% to 59% before an error 18. I put the unit in front of a large vornado fan and it cooled in about 4 hours. I'm not sure if my unit is busted or they are all like this. I read a lot of reviews where people wall charged their unit, I hope they try to solar charge them to make sure they do not run into some issues in a situation when they actually need some power. Manual says safe to charge in up to 104 degree weather, I have done it twice in the 90s resulting in error 18s both times. I'll keep trying to work with support and make it work, I really loved the concept of this unit as it would have my practical applications but so far it's been a lemon. Update! Its now been a full business week since I was promised a call-back about the over heating and the fan issue and have not heard anything so I lowered the stars back again to 1. If you do buy this device please try Solar Charging it instead of wall charging it to see if it can charge via Solar. If you want a battery that you can charge via a wall socket there are more High Capacity options at a lower price. You do not want to depend on solar power to find your unit with an error 18 effectively turning it to a brick until it cools down.