Hi
I have a hybrid inverter that accepts AC input (from mains), and DC inputs (from solar panels and batteries). This is to be installed in an outbuilding as an ‘offgrid’ system (except for the AC input, which obviously is connected to the grid).
The inverter’s manual states that it needs to be connected to a permanent grounded wiring system; and that it needs to have a 32A AC breaker.
So first question: is the outbuilding’s own AC breaker (installed by a pro electrician, although not sure of the Amp rating) good for the purpose? I would be connecting the inverter’s AC input to a wall socket. As it is, I could switch off the outbuilding electrics from its own AC breaker, or from the mains board in the house. Do I need a third AC breaker between the wall socket and the inverter?
Regarding earthing the inverter, I asked the online shop about the possibility of a ground loop if I installed a separated ground point for the inverter (loop between the inverter’s ground and the main house ground) . They suggested that I run a cable to the same earth point as the main house. The problem is, this is a huge pain for all sorts of reasons, so I’d like to check if there is any other possibility. Can I just not use the ground provided by the AC input? Any other options? How safe is to have a ground loop if a lighting hits etc with all the gear in between the two ground points?
System:
Many thanks!
dd
I have a hybrid inverter that accepts AC input (from mains), and DC inputs (from solar panels and batteries). This is to be installed in an outbuilding as an ‘offgrid’ system (except for the AC input, which obviously is connected to the grid).
The inverter’s manual states that it needs to be connected to a permanent grounded wiring system; and that it needs to have a 32A AC breaker.
So first question: is the outbuilding’s own AC breaker (installed by a pro electrician, although not sure of the Amp rating) good for the purpose? I would be connecting the inverter’s AC input to a wall socket. As it is, I could switch off the outbuilding electrics from its own AC breaker, or from the mains board in the house. Do I need a third AC breaker between the wall socket and the inverter?
Regarding earthing the inverter, I asked the online shop about the possibility of a ground loop if I installed a separated ground point for the inverter (loop between the inverter’s ground and the main house ground) . They suggested that I run a cable to the same earth point as the main house. The problem is, this is a huge pain for all sorts of reasons, so I’d like to check if there is any other possibility. Can I just not use the ground provided by the AC input? Any other options? How safe is to have a ground loop if a lighting hits etc with all the gear in between the two ground points?
System:
- 4 x 275W solar panels
- Iconica Hybrid 3000W 24V pure sine wave inverter
- 6 x 100Ah AGM deep cycle Photonic Universe leisure batteries
Many thanks!
dd