I am installing a Multiplus and battery backup plus pv on an existing 3phase installation.
The client only wants to back up the one phase, the 3phase is only for the swimming pool pump.
I have three choices;
- run a new cable from where is grid comes in to the pool, but this is almost impossible as there is a road between the house and the pool and I have no way to pass a new cable.
- change the pump for a single phase pump, easy but expensive.
- or put the inverter on one of the phases, and install a phase monitor relay on the pump, and if the three phase is out of phase, stop the pump. but will this work.
Any advice before I try the phase sync relay?
Is it possible to put a Multiplus on only one phase, and still use the three phase with one phase being supplied by the Multiplus?
cheers for any advice,
Jay
