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Bubbling / Fizzing noise from new AGM 100Ah 12v Batteries

coalfield

New Member
Joined
Sep 12, 2021
Messages
72
I have 2x 100Ah 12V in series for a 24v setup and have plugged into my Epever UP3000 AIO.

The batteries are being charged in boost mode via the mains, which defaults to 14.4V (28.8V for my setup)

I am however hearing faint bubbling / fizzing noises from both batteries when in this boost charge.

The spec sheet of the cells says 13.8-14.4V for the Cycle (Max 30A), and I have capped the current to 30A, and 14.4V is within spec albeit just.

Can anyone tell me if this is normal, or if I should be reducing the 14.4V down to something lower. By default I cannot change it unless I select Manual from AGM in the settings.

Note: there is nothing escaping from the cells as they are sealed AGM
 
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