Hi there
Just finished a 2500w 10 panel installation with a SMA2500HF inverter. Its a TT installation with a 30ma RCD main switch - old Square D board.
Every time I power up the inverter, the RCD trips even with all the other circuits off. I performed a ramp test and the RCD trips at 18ma, a bit sensitive, but not overly so.
I called SMA and they said that the installation manual states that a 100ma RCD is required for HF series although I cant find it in the manual. I did once install a 2500HF to an MK 17th edition board with no problem.
One option is to ask for a replacement, the other is to install a main switch supplementary board.
Any one else had RCD problems with this inverter?
Just finished a 2500w 10 panel installation with a SMA2500HF inverter. Its a TT installation with a 30ma RCD main switch - old Square D board.
Every time I power up the inverter, the RCD trips even with all the other circuits off. I performed a ramp test and the RCD trips at 18ma, a bit sensitive, but not overly so.
I called SMA and they said that the installation manual states that a 100ma RCD is required for HF series although I cant find it in the manual. I did once install a 2500HF to an MK 17th edition board with no problem.
One option is to ask for a replacement, the other is to install a main switch supplementary board.
Any one else had RCD problems with this inverter?