I just sold 2 more 6.2 kw zumax hybrid off grid do it ypurself systems to 2 guys with cabins up in mountains. I use a Veveor 5kw step up/down ransformer to convert 230 60 htz vac to 120/240 split phase For now they can only afford 9 290 watt panels per sytem. Later they will get another 9 each...