During maintenance, these plugs should be checked. Also, the basement can get wet and occasionally attract animals that like chewing on rubber.
A modern battery system has all the necessary protection functions such as fuses and surge protection (low voltage), circuit breaker (fire), redundant auto-off in case of operational problems or a fire-proof housing made from steel or pressure-resistant cast aluminium.
Maintenance is therefore limited to a visual inspection of the storage unit, to looking at the DC connections (plus and minus) to battery inverter as well as checking the Internet access for remotely reading the operating data. (HS)
Look at this, too:
Storage advice: Monitor your lithium storage system
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