Hi,
I just had a system installed and we started with a Growatt 5KVa inverter. It was nice, the portal was nice, however the switch-over time from power failure to backup is 0.5 sec and that completely negates having a computer or a printer on as everything switches off momentarily.
We just (yesterday) switched to a Goodwee ES 4.5, however this is riddled with issues from:
Wifi dongle not working (at all)
Intermittently switching itself off and rebooting.
Lights flickering at random
Appliances switching off momentarily.
At this point in time, considering the 4 week installation process currently and the money spent, I am quite disillusioned with the cost vs results.