Hello,
I've installed 2 x Growatt SPF 5000 ES (I live in Europe) in parallel and a very annoying problem I'm now facing is that they occasionally trigger the upstream RCBO (the residual current component not the over current one) fitted by the utility company.
I am confident it's not because of the downstream consumers because if I simply bypass the inverters the RCBO would not trigger.
Even though this is a DIY project I don't think there are problems with wiring because I can (most of the time) power the entire house and works just fine.
Some have suggested that the RCBO is not calibrated correctly but since it does not trigger if I bypass the inverters I think probability is low.
The RCBO would almost certainly trigger when left running for more than a day or two but also it does trigger almost immediately in the following conditions:
- units switched off from power button
- output of units not connected together
- battery not connected
I am aware that for a correct parallel setup the above should not happen but it's up to the inverters to fault rather than trigger the RCBO, right?
Also when the units are not wired to work in parallel the RCBO does not trigger.
What do you guys suggest I do at this point? The system is mostly unusable in this state.
Attaching the wiring diagram for your reference.
Kind regards,
George
I've installed 2 x Growatt SPF 5000 ES (I live in Europe) in parallel and a very annoying problem I'm now facing is that they occasionally trigger the upstream RCBO (the residual current component not the over current one) fitted by the utility company.
I am confident it's not because of the downstream consumers because if I simply bypass the inverters the RCBO would not trigger.
Even though this is a DIY project I don't think there are problems with wiring because I can (most of the time) power the entire house and works just fine.
Some have suggested that the RCBO is not calibrated correctly but since it does not trigger if I bypass the inverters I think probability is low.
The RCBO would almost certainly trigger when left running for more than a day or two but also it does trigger almost immediately in the following conditions:
- units switched off from power button
- output of units not connected together
- battery not connected
I am aware that for a correct parallel setup the above should not happen but it's up to the inverters to fault rather than trigger the RCBO, right?
Also when the units are not wired to work in parallel the RCBO does not trigger.
What do you guys suggest I do at this point? The system is mostly unusable in this state.
Attaching the wiring diagram for your reference.
Kind regards,
George