Attention all Growatt SPF 3000 users

[kpw]

Hello all Growatt users, I would like to get some feed back on the longevity of these types of growatt inverters.
As any of these cheaper Chinese type of electronics they seem to be a good deal, but do they hold up?

Please post your experience

How long it has been in service?

How much use- Full time off grid or emergency backup?

24v or 48v model?

Any problems overall

 

[DelChamp]

My BMS says my 48V 3000 has been going for 317 Days with (16) 280Ah 3.2V EVE cells, but last Monday it identified a low cell and my Growatt shut off. I hope that didn't kill it.

 

[sparrowhawk]

I have two 24v spf 3000 running in split phase. One of them failed in the first 6 weeks. When I talked to Ian at watts247 he had me take apart the unit and I found on the main board where it had gotten burned around a post that passes current from the mppt charge controller to the main board. There are two of these post and they are threaded into the main board and apparently sometimes they don't get tightened down which causes resistance and overtime can damaged the board.

He had me open up the other unit and said I should tighten the post on that one and when I did one of the post broke off and cannot be replaced separately. He sent out two new boards and I swapped them out. It got me back up and running but since then I have been having multiple problems with one of the inverters.

Unfortunatly after many back and forth emails with Ian nothing has been resolved as he blames everything but the inverter and has yet to explain how any of these things could actually be causing all the problems I'm having.

 

[PopDBop]

I have two 24v spf 3000 running in split phase. One of them failed in the first 6 weeks. When I talked to Ian at watts247 he had me take apart the unit and I found on the main board where it had gotten burned around a post that passes current from the mppt charge controller to the main board. There are two of these post and they are threaded into the main board and apparently sometimes they don't get tightened down which causes resistance and overtime can damaged the board.

He had me open up the other unit and said I should tighten the post on that one and when I did one of the post broke off and cannot be replaced separately. He sent out two new boards and I swapped them out. It got me back up and running but since then I have been having multiple problems with one of the inverters.

Unfortunatly after many back and forth emails with Ian nothing has been resolved as he blames everything but the inverter and has yet to explain how any of these things could actually be causing all the problems I'm having.

Wow. That's not reassuring. I my have to reconsider Growatt and stick to a DIY build.

 

[schmism]

2 3kw spf running for over a year. I transition to grid/battery once almost every day. with current sun the half the house that is on the critical loads pannel is running off grid for about 8 hrs of the day. Durring the peak sun days of early summer i can go 2-3 days off grid.

 

[Jim Burrow]

Same here schism. anything that draws close to 1000 watts, like microwave, toasters, coffee pots all have to be on the grid 24/7. Otherwise if on 2424lv, if the battery current goes over 23 amps the controller will shut off for about 45 to 60 seconds before turning back on. If I'm in full sun, the battery current remains in the low teens and all is ok except with the microwave which draws 1800 watts. The moment the microwave starts, the controller shuts off then restarts after about a minute.