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Pylontech Internal Error and High Voltage Alarms

Bruce K

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Hi All


I have three installations, all Victron coupled with Pylontech batteries, that are generating repeated Internal Error alarms, as well as High Voltage alarms. I can see on VRM that the voltages are well within the Pylontech specs. 


Any thoughts on what might be causing this and what the solution is?

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Thanks @root, interesting reading. I have all three systems set to Victron's recommended charge voltages which are much lower than the Pylontech specs. Two of them include PV and the third is backup only. In all cases, the problems started a year or two after installation but it could still be a cell balancing issue. I'll try what is suggested. Thanks for the links.

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