question

Hi there,

I've the same issue.

Multiplus 2 48/3000 product ID 2629 FW v494

Cerbo GX v284

2kWp AC-coupled PV on AC OUT1

At first Im using the external CT; then switched to EM-24. Issue remains the same.

Is there a solution available or in sight ?

Best regards

Thomas

I finally found a Solution for me.

The installed EM-24 is configured as Grid meter.
In ESS configuration „Grid Metering„ is set to „Inverter/Charger“.

Now the display and values in remote console and VRM are correct.

Regards

Thomas

This issue is still present, and have had reports of at least one other person having the same issue.

@mvader (Victron Energy) Is this bug known?

For reference, using Multiplus II, Venus GX and EM24. Everything is on latest prod firmware.

I also have this issue on my installation - wildly fluctuating AC Loads between 0 and 10KW
6x MP2 5000 in a 3 phase config, Cerbo GX, EM24 Gridmeter, 2x SMA Tripower 5000 AC coupled

16x Pylontech 2000 with low resistance DC cabling & busbars

ESS standard mode, currently no AC out connection

Austrian grid setting, low impedance grid connection only 20m from street transformer

Everything on latest Firmware

resetting MP2 or Cerbo does not help more than a few minutes

System stabilises after 5-10 Minutes and starts fluctuating again later

During this event the loads are about 3kw, pool pumps, irrigation pumps, household appliances

I'm also having this problem with my installation. When the battery is charged to 100%, AC Loads starts acting weird and oscillates between far too high and low rates while the real load is constant.

My setup constists of 3 Multiplus II 48/5000, two MPPT charge controllers and a Fronius 3.7-3-M PV Inverter. ESS is set to zero export with 200 W of constant power draw. All metering is performed by the Multiplus units.

Could it a problem with L1-L2-L3 Rotation at the EM24 or so?

I found the problem. You have a L1-L2-L3 Order in the EM24 as well as in the Multiplus 3-phase settings.

Check that the EM24 has the right Phase order (Display View in EM24) and check the wires of the Multiplus . I had to reconfigure the 3-phase settings of the Multiplus (you need to add the assistants after this again)

To clarify. How it can happen?

I had at the beginning L1-L3-L2 at the EM24 (but did not check the phase overview at the EM24 or cerbo). But my wires to the 3 Multiplus were right. So I did configure L1-L2-L3 in the MP settings. I got after this a phase-rotation error and did try L3-L2-L1 which did work for some reason. I thought that if the Multiplus recognizes the phases, then you can't do anything wrong here (phase rotation error), but that's not the case (see strange AC Load behavior)

I have the same issue that AC loads are totally fluctuating.

3 phase each with a MP2 3000, EM 24 with RS485 as frid meter, additional PV Inverter with ET112 on ac in.

The system is not able to keep the set gridpoint but every 30s starting to see high (1000W) loads and then tries to feed in above 2000w into the grid.

Any guidance or checklist from Victron or the community would be greatly appreciated.

Tom

I still have no inverter and batteries, but I bought a Cerbo GX to prepare for my ESS. I have a grid meter installed and the -4573W is correct. I have two meters for my two PV setups and 5257W is the correct accumulated value. The calculated AC Loads is not what it should be. What could be wrong?

My meters showing the right values:

Yesterday it was perfectly fine with less PV, values are updating every second.