EV Charging station Auto-mode not working with 3 phase setup using mono phase solar ET112-meters

Q&A and troubleshooting EVCS
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My setup:

  • I have a 3 phase grid connection (3x400V+N)
  • One MP II 48/5000 on L1, connected to a 15.4kWh BYD Premium battery
  • One EM24 eth as a grid meter
  • One AC out side solar inverter (so also on L1), metered by an ET112
  • One AC in side solar inverter on L3, metered by an ET112
  • One EV Charging station NS, connected to L1 AC in side

When the L3 solar inverter is producing, the energy is fed to the grid via L3 and looped back in via the L1 (a zero operation in my country). Everything works fine, ESS works and can keep the grid at a set setpoint etc.

But, I always had (in the real time view) an error in the AC Load number. As ESS sees the L3 out and back in via L1 of the L3 solar inverter as a Load equal to the feed in. So, the real time AC-Load display is always too high.
In the energy history graphs, it shows ok, which was important for me, so I could live with the real time view being wrong.

But, I installed a EVCS NS and I think it looks at the AC-Load to trigger the auto start. For example, it will start the start countdown when Total Solar Power is larger than the AC-Load number… which is not that often and makes the automatic mode not working as I would like.

An easy fix is probably to replace the ET112 of the L3 solar inverter with an ET340 and connect the L3 solar to L3 of that meter… but that would be a waste of money and material for something that can be fixed in software!

Please Victron, make the phase selectable in the ET112 setup!

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I bought an ET340 to replace my perfectly fine ET112. Solved the problem immediately.
It is a shame I had to buy the ET340 to make things work, while a (for Victron) probably simple software change also could have worked and not only for me. Just make it possible to assign the ET112 to a phase, that is all.

Aside from this annoyance I do appreciate Victron and the work they have done to make a good system!

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Lets keep this alive

I have the same isue

As do 6 other peaple on the forum but nobody cares

“@victron -dev” just mark the ET112 as incompatible with 66% of 3 faze systems

1 Like
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So i see an et112 in a multifase systems
Do You know that this gives problems?

The ET112 can only mesure L1 (the fase your mp2 is on)

To messure a single phase load on l2 or l3 you need an et450 or Vm-3p75ct ( 3 fase meter)