Multiplus Not Seeing AC Input Voltage.

Multiplus 24-3000-70-16 is inverting properly as before, but it is suddenly having difficultly with AC input. Test meter on the AC input terminals indicates normal voltage (237V) but the Multiplus reports over the VE BUS a reading of 164 V, 0 Hz. (???) This is of course insufficient for the unit to recognize as valid input power, so it continues inverting for its L1 output, and does not pass through power to AC L2.

The unit worked normally until this started, and no changes to operation of wiring are reported by the system owner.

I can think of no external event that would cause this mismatch between what is measured at the terminals and the voltage that the Multiplus reports. Beyond contacting Victron through the distribution chain for a warranty claim, does anybody have an idea?

I’ve also got a customer with a 24/2000 that is doing this - it inverts fine,but reports 72v AC in, even though we can measure 230v at the terminals. Updating the firmware got it to show the frequency but it insists the voltage is low.

I have seen a system do this when there was a circuit from the output of the inverter crossed into the input circuit of the inverter (so a loop feeding into itself.)

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To me happen exactly the same issue.
Same AC generator… one day to another, starting to say 165volts… when I test it and inside de multimeter say 224Volts.

And now… say 0 Volts…
I dont know what happend with the Update… but always have new problems with each upgrade.

Any Fixes found? I have the same Issue, multimeter shows me 238V at ther AC IN Terminal but through the VE.Bus on VEConfig it only shows around 150V AC IN. The minimal Input is 180V in the VEConfig program, therefore the Charger doesent start… . Why?

I cant charge my batteries using the grid anymore, it used to work perfectly and just stopped working for some reason?! Help…

Same problem here. 235V on the AC input, but the Multiplus only measures 70V!

I saw this once with a customer unit, where a slug found its way onto the system board and it failed to measure ACIN correctly. ESS stopped but it continued inverting just fine. The board had to be replaced. Worth shutting down and opening up to look for signs of fried critters or something.