I have a MPII ESS with Fronius PV in parallel on grid side (AC IN). All loads are on AC OUT. The AC IN current is set at maximum 20 Amps. The Grid is showing ~3000 watts and the solar ~1000 watts. The battery is doing a scheduled charge. All good. If AC IN is limited to 20 Amps this should be showing a maximum of 4600 watts (230v) and I think it’s adding the solar to the total on grid side (which kind of makes sense) but it looks like the total AC IN is >4600 watts with full solar. Or is this just my OCD? Is there a way to make the current flow graphic go from solar to the grid to combine as the total input on AC IN?
Where is the Fronius actually wired to vs where it is located in the “PV Inverters” settings. If the Fronius is wired on AC Out and the PV Inverter settings have it on AC In (or vice-versa) then you can get something like this.
Hi Dean. The Fronius is on the grid side of the Multiplus II i.e. AC IN. I found a separate thread on this same issue from May and it suggested changing the location of PV to AC OUT - which I tried but this then added the PV power to the loads (which is also wrong).SOLVED - VRM Grid Power Incorrect - #4 by Chris78 I think it’s a firmware bug in the Venus display (since VRM is showing it correctly).
Using Gridmeter in MPII settings. No external current sensor. Gridmeter, PV and MP are all on the same phase. PV is on the grid side (AC IN). Multiphase regulation setting is set to total of all phases (did not change this). VRM is displaying flow correctly.
The devices are reporting each power level correctly but the GUI in v2 is adding the pv power to the grid power whereas it should be subtracting (as per GUI v1 and VRM).
