[RE-wrenches] Adding acid to a battery

Ron Young solareagle at solareagle.com
Fri Feb 24 12:05:34 PST 2012


A client purchased a set of batteries (not from me) and purchased BOS from me. The batteries are a double walled type and it appears that one must have fallen over during shipment or was improperly filled at the factory and some of the electrolyte leaked into the space between inner and outer wall. The only solution was to remove the inner battery cells and dump the acid from the case. A small amount (about a quart) of acid was replaced (1.26 s.g. automotive battery acid) and then topped up with distilled water. The battery performs fine but one cell appears to have a lower overall s.g. than the rest (1.45 vs. 1.65) . This has shown up over time. 

Question: has anyone added acid to a battery to raise the s.g. Is this an acceptable option or totally off the wall. These batteries still appear to have full capacity and to replace the single problem battery will be very expensive.

Ron


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