Hi all. Have noticed that sometimes after grid becomes poor the Quattro would not reconnect to grid even if it is within parameters. [image] Is there a retry count or has anyone noticed this? If I switch the inverter to Inverter Only mode and back to On, it starts to work. Thank you.

@nickdb - I know you are a Jedi of NodeRed. Could you guide me setup a flow which every 30 minutes sets the VE.Bus System Control to Inverter Only and back to On? Happy to send you a gift :slight_smile: With this I could get it to run effortlesly - trying to learn now NodeRed on the go but custome…

Here you go, try this. This flow will send a 2 every 30 minutes, wait for 30 seconds, then send a 3. You can adjust it how you need. I have a filter there so you don’t need to continually write to the multi EEPROM and wear it out. Just connect your inverter mode switch position. I have left it off, …

You could always have a phase comparator on ac in 2 so it physically disconnects ac2 in, when it returns within acceptable parameters the inverter should try again. Having a flow to keep retrying is not as simple as it sounds.

Hi @lxonline . Wouldn’t it behave the same if AC is not available few times compare to AC being low few times? I think the results will be the same, no?

If the AC voltage disappears then reappears the quattro tries again. Its like faking a grid lost scenario. You can test the theory by swirching the breaker for grid ln and off. See if the system retries It is either that, or you set it up so it is less tolerant of the grid and then it disconnect l…

Super! Thanks for this - really appreciate it. Will give it a try now.

It is set to no grid code compliance with widest range of tolarance, it still stays after a while in AC disconnected state. This is a mountain cabin which requires almost a 4 hour round-trip so don’t have the luxury to test with breakers :frowning:

Yes, here is the config file downloaded just now. PCJ__c0619ab55099_inst_ttyS4_Interfaces_Mk2_Tunnel.rvms (9.1 KB)

Install VE Configurator. Part of VE Tools.

Quattro not connecting back after AC grid lost

Q&A and troubleshooting

Jonesy (Jonesy) 26 July 2025 22:49 37

Hi Guy, perhaps you could have a read on my situation which is very similar actually. 1 Phase Parallel Quattro system frequently disconnecting from Grid & Geny running not detected - Q&A and troubleshooting - Victron Community

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Quattro not connecting back after AC grid lost

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