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hanno-smit asked

Quattro 15000 in 3ph 4parralel configuration - 2 inverters not inverting when grid present

We have built the biggest system that Victron allows: 12x 15000 Quattro in 3ph with 4 parallel inverters per phase. Firmware was updated to the latest v552. The system has been successfully set up via VEBus System configurator and is talking to a Ekrano GX. All 12 inverters shows up in VEBus System Configurator. VE Configure was used via VEBus System configurator to update the inverter settings and when uploading "upload to all inverters was selected". The configuration on the offending inverters was individually checked to confirm that it is the same as all the others.

The problem: Inverter # 3 on the Blue Phase and inverter # 3 on the white phase inverts correctly when the system is freshly reset and running from battery. Then when the system detects the grid and switches to grid input the ACOut1 on both inverters go off.

As I am typing this I am realizing that this must be an ACIn contactor problem in the inverter. If you have any experience with this fault I would really appreciate any advice before I remove the inverter and replace it.

MultiPlus Quattro Inverter Charger
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2 Answers
Alexandra avatar image
Alexandra answered ·

@Hanno Smit

You will have to set it as stand alone (remove comms from the main system) and test it. You can do it in place if you have set it up with the right switchgear. Of there is an issue still, then the next step is to take it out of place and test again.

Tricky one to troubleshoot with parrallel set up, as a wiring issue can cause the faliure to connect as well. Usually time consuming too.

before the return it to supplier due diligence with the pre rma tests should be done. Form can be found at the bottom of the related product page.

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hanno-smit answered ·

To complete the circle on this issue the two inverters returned to normal operation after a complete system reset and cold start. The system did reset itself after loading the configuration via VE.Bus System Configurator but then entered a state where inverters W3 and B3 did not give output when connected to grid.


Completely resetting and cold starting the inverters a few hours later after much faultfinding resolved the problem.

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