My multi RS opens AC1 multiple times a day no warning or alarms . when reconnecting it clicks about 5 or 6 times. Has anyone any idea what this can be ? i already tried another multi rs , same issue. System has bin running fine for about a year until last week. Hope someone can help me out. Reg…

Check grid voltage and frequency. If it started to happen out of a sudden and behaves the same for two different units, then it is very possible that the grid may have issues. Any (new) construction sites or something similiar nearby? Sometimes big machinery without or with damaged “soft-start” can…

Grid voltage and frequency are OK , problem came afther a power outage of an hour,that was two weeks ago, since then i have this problem.

The thing about voltage and frequency is a good call, but then those 5/6 clicks when reconnecting are quite strange…

I agree, should be one click right?, il looked at the detailed VRM logfile this morning , voltage 231Vac max and 222Vac min. Frequency’s between 50,3 and 44.9 Hz Last night ac1 remained connected, until the sun came up, logfile showed thirty times a Ac1 disconnect state over a period of three hours …

Maybe a silly question, but do you have AC Ignore enabled? If not set up correctly, with decent hysteresis and delay timers, it might result in this behaviour. The NS protection log in Victron Connect might also hold some clues as to why it is disconnecting to start with

[image] Michel: voltage 231Vac max and 222Vac min. Frequency’s between 50,3 and 44.9 Hz Depending on your grid code, the voltage might be ok, but the lower frequency of just 44.9Hz is very likely too low, so the mains gets rejected based on low frequency. In VictronConnect, under Settings an…

I am sorry, I made a mistake Hz min is 49.9 Be connect only tells me it’s bun disconnect, but no reason why

Can’t find ignore ac input, only , ac input control which is set disabled, It doesn’t say in the logfile why it’s disconnecting ,only that it does

Apologies, it is called AC Input Control. What firmware version is it? Mine definitely gives reasons for the disconnection: [image] [image]

It’s on v1.29 [image] [image] 29

Multi RS Solar 48/6000 keeps opening AC1 relay and than closes again after 60 sec

Q&A and troubleshooting

Michel.pels (Michel) June 19, 2026, 6:06pm 13

I had an electrician over to day to check allof the above. no deviation found

Multi RS AC1 relay open?

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Multi RS Solar 48/6000 keeps opening AC1 relay and than closes again after 60 sec

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