MultiPlus2 strange current values on ACout1

Q&A and troubleshooting
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1

Hello,

3-phase mulitplus2-8000 system, with all loads on AC1-Out, grid on AC-In, Fronius PV on AC1-Out, VenusOS 3.70.
As you can see in the below screenshot, Phase 2 and 3 on AC-Out apparently have same load, but wildly different
amperage values. Generally, the multiplus on Phase 2 behaves a bit weird; both L2 and L3 usually have identical load, but while L3 does consume a bit from the grid, L2 is constantly feeding back to it; in the past both L2 and L3 fed back to the grid to compensate for L1,
ESS grid setpoint is at +30W.

The screenshot was taken with all PV off and the heat-pump on, which consumes about 900W/phase. The rest of L1 is most of the house.

image
image937×154 18.2 KB

Any idea what might be the case here? I get the feeling this started with the update to 3.70, previously it has been rock-solid.

Thanks!
Manuel

2

Firmware rollback is required for troubleshooting. If you feel it it was fine before and it is not not then that is where you start.

Otherwise something maybe changed in power factor on a load on L1. Could be a coincidence and a load or connection innwiring has changed condition and the firmware update made you more sensitive to the systems activity and you have now noticed it.

Or something in ohase compensation has changed?