Drake, Did you monitor the voltage of this cell / battery? Outside chance it had reversed polarity and was sucking energy from the other batteries. It takes a very abused battery bank for this to happen, but I've experienced it where the worst cell in a 2-volt string will flip polarity when the battery bank voltage crashes. Usually, the cell is very hot at that point too.
Dave Palumbo ________________________________ From: RE-wrenches <[email protected]> on behalf of Drake Chamberlin via RE-wrenches <[email protected]> Sent: Wednesday, July 24, 2024 10:40 AM To: RE-wrenches <[email protected]> Cc: [email protected] <[email protected]> Subject: [RE-wrenches] AGM blew on discharge A severely abused bank of Rolls Surrette batteries had one battery off gas heavily on discharge. It seems like the off gassing happens on overcharge, not discharge. What could have caused that? Thank you, Drake Drake Chamberlin Athens Electric LLC Ohio Electrical Contractor’s License 44810 NABCEP Certified PV Installation Professional --
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