Connecting inverter “Load” output to the incoming mains.
Hi
I’m having a system installed this week in the UK comprising of PV and 2 parallel hybrid inverters and 4 battery modules.
My understanding is that the Inverter “Grid” output drops in the event of a supply outage and that the “Load” output will provide a continuous output provided there is PV or battery power available.
My installer however is connecting the “Grid” and “Load” outputs together in a local consumer unit, with both outputs also tied to the incoming supply grid.
He is providing a new earthing spike and bonding this to the neutral in the consumer unit.
His logic is that in the event of a supply grid failure the CT will prevent any current feeding back into the grid.
I cannot see how this will work in the event of a grid outage. How can the inverter generate 230V to supply the house load and not feed back to the supply grid?
Is this not hazardous to anyone working on the supply line?
I would be very grateful for an explanation of how this could work.
I would not let this installer back in your house. He obviously has no idea what he is doing. Goodness knows what other things he has done. Insurance is all well and good but doesn't help much if he kills someone.