Hi All,
I've seen the ESS manual where it says not to use offgrid/intentional islanding but not sure I fully understand why. My use case is :
- ESS system with Quattro (sized to handle all house loads), batteries sized to run house loads for >24 hours.
- On a cheap rate tariff (6 hours overnight) - plenty of time to fully charge batteries - uses ESS scheduled charging.
- System also has Solar PV and I have an automation to estimate to what SoC batteries need to be charged overnight so that they shouldn't reach 100% during the following day. Uses ESS settings to control overnight charging level.
- No generator
- I want to run on-grid for the scheduled charge window, then off-grid during the day until the next scheduled charging window. Thus I can guarantee that when the inverter is running it is not connected to the grid (and absolutely guarantee that there is zero feed-in to the Grid).
I could just physically cut the AC1 IN via the isolator but I don't want to get up at silly-o-clock! From what I read elsewhere this might be possible using a flag and generator options but comments mostly seem to say don't since it it's not a supported combination with ESS.
Appreciate any comments/thoughts?
Colin