Their spec sheet has errors. The 8000 W ouput inverter is listed as 98% efficient with losses at no load and full load of 2 watts. 98% efficient means 2% losses. 2% x 8000W = 160W. Their figure is off by 8,000%.
But I think I will buy one. I can get a surplus 10 KVAR cap bank I could use for reactive power and spin my meter backwards all day. I'll even sell shares in my new power plant. I'll let 10 of you each buy 25%.
It could be a good product as an inverter for a solar array, using solar PV output to charge the batteries, but I diidn't see anything about its compatibility with solar cells. Can it adjust the DC voltage/current to get optimum output like good PV inverters? It would have to have a controller for the PV DC input and another charger/controller for the battery DC bus. If you live in a high outage area, it might make sense to be able to continue running your Xbox and laptop during an outage; but only if you're a computer design whiz like my neighbors, making $1,000 an hour designing games and other things beneficial to our society.