Hello,
in my current setup, the MultiPlus-II GX is technically connected to L3, as is the AC solar inverter.
My Victron power meter measures all phases, but in the VRM portal this results in an incorrect display of AC power usage (only the instantaneous power is wrong—energy values are calculated correctly).
I’ve tried to solve this in a non-invasive way (i.e. without swapping phases at the meter), but there seems to be no option to tell the single MultiPlus-II which phase it is actually connected to.
Would it be possible to make this configurable in the GX device settings?
First off I agree that it would be nice to change phase of a Multiplus II or change the phases of the grid meter.
Technically you can rotate the phases to your liking, this is also what the energy company does in residential areas. Your L1 phase is not the same as the L1 of your neighbour. This is because contractor tend to connect all ovens to L1 and solar to L3 creating imbalance otherwise. The
Technically you dont know if you have the grid L1-L2-L3 connected to your fuses left to right in your house. You just know the relative phase between them.
So connecting your Victron Energy meter L1-L2-L3, L2-L3-L1 or L3-L1-L2 does not really matter expect for naming convention. Don’t connect L3-L2-L1 as this will change the relative phase offset.
If the phase is incorrect there is large error in the ratio between real power and apparent power. This also means that the energy values you are paying for are incorrect.
My oven has a large apparent power draw but almost no real power draw. This means that I do not pay for the apparent power because my 3phase energy meter knows almost no real power is drawn.
as I work professionally in the field of (intelligent) electricity metering, I know that I could physically swap the phases. Incidentally, modern shunt-based electricity meters always count the active energy correctly, as they practically consist internally of three single-phase meters, each of which measures the power and then adds these values together and integrates them into the energy.
My feature request was suggested because I don’t want to physically change my installation (it’s very tight in the box and the wires are close together), but want to swap the phases in the software. This should not be a technical problem at all. Perhaps someone in the house has two MPs in two places and they are connected to different phases… That’s why my request (which is certainly not urgent) remains in existence
