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Old 25-09-2023, 08:23   #1
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Boat: Tartan 40
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Solar chargers & BMS cutoffs
There's a lot of discussion here around BMS cutoffs and alternators. One particular concern is that after a BMS cutoff that hasn't been announced, the alternator might cause a very short (milliseconds) high voltage spike that can not only destroy the alternator, but also the other electronic systems.

I have 610Wp solar installed and frequently see > 45A charge current in my 12V system, about par with the maximum I see from my alternator.

Why are we not concerned about BMS cutoffs and then solar chargers causing similar voltage spikes? Does it not happen?

Thanks,
Dirk
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