Growatt spf 5000es 3 phase configuration voltage stability

[terkazarian]

Hello all,

I've got 3 units of Growatt spf 5000es in 3 phase configuration.

Once i turn on some heavy compliance (Electric Kettle - 2KW, AC- 2.5KW) i can hear that the UPS beeps for a second and then stops. it sounds like a voltage drop or something like that.

Any ideas for solution?

Thanks,

Arthur

 

[DIYrich]

Put the ac on its own phase, and add a soft start.

 

[kirkdis]

how much capacity is your UPS rated and which currents will be drawn and which currents can be delivered by your UPS continuously? From what you described it sounds your battery is not able to provide those high currents and the DC voltage drops down and makes the BMS think it´s in an error state...