if you have EGO batteries this is a must have for emergencies. Put those batteries to use. I tried a 10AH on my standup full size freezer and it worked like a charm. Ran without issue for several hours, at least 5 before I fell alseep so don't know actual run time. Tried it on a bunch of emergency type of items like fans, lamps, TV, all worked without issue. It even has PD USB C to charge pu my laptop and USB for my iphone and ipad. This will come in super handy the next time there's a power outage. Worked with 2.5AH, 5AH, 10AH batteries, what is nice is that the batter meter remains on the whole time it is in use so you can easily check on the status. I have a table top ice maker and having ice during a power outage is awesome, but it will suck your batteries down fast. Would be cool if they could add it to the ego connect app so that you can monitor run time. Its only 400W so don't even try running a space heater, coffee machine, toaster or microwave oven, only small appliance with light loads should be used. For the price its a terrific accessory for EGO batteries that you would not normally use. Don't need to spend the big bucks for the ego fan when you can plug any fan into this guy. The compact size is perfect, I was looing at the other 4bay inverter but its so big, this little guy can be stored just about anywhere.A couple of things that seems odd and I don't like is that you should use it upside down with the batter on top for best cooling but then this puts the light on the ground and useless. The other is that the handle seems to get in the way, unless you fold it down it blocks the outlets and button. For future versions It would be cool if you could piggyback it with another one so that you would run a mini microwave.