Bests & Worsts Reviews from Amazon

I spent a lot of time researching different battery banks. All of them are very expensive for what they are. I narrowed my choices to the Goal Zero yeti 400 and this one. Goal Zero makes great products but they are really over priced. After a couple of months of research I decided to go for this one. I need a large battery bank for power failures and camping with a Cpap machine. When camping I recharge mainly off of my popup trailers solar panels. When I received my Suaoki unit I charged it all the way up. I was/am a little concerned about the sparks that shoot out of the charging jack when plugging in the AC adapter. That happens with either side of the plug. Meaning it sparks when the adapter is plugged into the wall and I plug it in to the battery bank or it sparks in the wall outlet if I plug it into the battery bank first then the wall. The first night I had it I ran the Cpap machine and its humidifier off the battery banks inverter. I ran the Cpap for 8 1/2 hours. The charge indicator showed 1 bar, meaning the bank was somewhere under 20% power remaining. That concerned me. It has been a long time since I have been without power for more than a few hours but things happen. The second night I ran the Cpap without the humidifier on 12volts. This is how I run it when camping. Again it ran for just over 8 1/12 hours. One power level bar was gone so it used less then 20% of it's power. At that rate a 100 watt solar panel on a decent day will keep it topped off. If you have the need for a well made high capacity power bank that is a fraction of the weight of the Goal Zero then this may be what you are looking for. I don't know why these companies refer to the battery bank as a solar generator. They don't generate anything. They store electricity. Update 12/29/17. I've had this power supply for almost a year. Out of the blue I was contacted by Suaoki. They had found that there was a problem with the AC charger for this unit. (probably the shooting sparks that I described in the original review.) They sent me a new one free of charge. What a great customer service that was. I have used this unit a lot over the time I have had it. Lots of camping with a CPap and a couple of power outages. Without running the the humidifier I easily got 4 days out of a charge. Over the summer I got rid of the tent trailer and got a class C motorhome. I put 240 watts of solar on it and it has no trouble at all topping off the power. So after the first year, no regrets in my purchase.