I have 6 x 140 amp 12 v AGM batteries in parallel fed by 3 x Victron 50 amp solar controllers (1220 watts solar panels) and backed up by a Victron 30 amp 240v intermittently used charger.
Infrequently everything switches itself off and then after anything from 10 secs to a minute back on.
The batteries are only 2 months old. The load is about 40 - 50 amps overnight, All the connections are tight and the wiring at least rated to 130 amps.
The only electronics are the monitor and the 130 amp manual circuit breaker in the positive wiring and the breaker does not open.
Can the monitor break the circuit at the shunt if it gets a misreading or whatever?
The chances of a faulty battery is very slim as the syster is stationary.
Can anyone advise?
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Sounds like volt drop and recover which suggests resistance change. Since your connections are good, it can only be batteries. (Unless its the breaker. So bypass this one first)
No the shunt is what passes the current.
The monitor just reads it.
If you have daisy chained the batteries then maybe end batteries are having trouble, they would work the hardest.