OK hardware, dodgy software, *zero* support
Had a Growatt based solar install for a year or so in the UK. The hardware (in my case a Growatt SPH inverter and two Growatt batteries) is fine... nothing spectacular but reasonably priced. If you want to configure it *at all* you have to use their app which is poor *when it works*... and it really doesn't work much. It relies on the Growatt Cloud service which seems to be down around 50% of the time. Randomly it will lock your account also so you can't even use it some of the time it is actually available. Growatt tech support is essentially missing. They have never answered the phone nor answered emails. There are better options for the money and those companies actually care about their residential customer more than not-at-all.