Good day.
I am planning a grid-parallel system using a Victron Multigrid 3000VA, a 3.4 kW Pylon battery, 6x 355W solar panels, and a MPPT charger.
The plan is to put my essential loads (Fridge, lights and some plugs) on the AC output of the Multigrid. The power in the Pylon will mainly be used during power outages, therefore I plan to use the setting to use maybe 20% of battery when solar is inadequate to power the essential loads, but top-up with grid power otherwise. I don't think there is any
Next thing for me is optimise my self consumption. The solar power produced will be more for most of the daytime hours than what the essential load will require. So after the battery are topped up to full capacity the excess solar power should be used to reduce the consumption from ESKOM on other loads that is NOT on the Victron's outputs. Whether that is a geyser, or a washing machine, does not matter. This is just so that the excess solar power is not wasted. Maybe I misunderstand something here, because I struggle to find clear answers on whether my idea is possible. This is maybe because it is common sense (to others except me) that this will happen autonomously, or because it is totally ridiculous and not possible.
It seems clear that I cannot just put all my non-essential loads on the auxillary output of the Victron, as that load is limited to 16A and because I want to use the excess solar power wherever it is needed, I want the multi to basically feed that power back to the mains side and powerassist it there.
Is that possible using a multigrid? Does it require maybe some additional equipment? Or special settings?
The alternative I am looking at is using a grid-tie inverter (and setting it to zero feed-in back to ESKOM) and couple that across my main db-board, and then have a seperate pure backup system installed for the essential loads. Would appreciate your views on which option is best. It seems that going grid-tie there might be some conflicts between the two systems? Victron seems to only support that if using a very specific PV inverter? Should I then rather use another combination of PV-inverter and hybrid-inverter? What do you guys suggest?
Kind regards.