Capacity left in batteries
I have 4, 6V golf cart batteries that I took from my motor home. They were in service for 3 to 4 years and were well taken care of. Hardly used, usually on float and watered as needed. They were hooked up in a 12 volt configuration. I now have them set up as my experimental batteries for my backup home system. They are set up in series for a 24 volt bank at, I assume, 220 Ah capacity. Being that they are "old", I want to determine their loss of capacity, if any. I fully charged them and took an SG reading of approx. 1.270. I put an approx. load of 250w for 6 hours on the bank. I withdrew 57Ah in the 6 hours ( trimetric ). The SG at the end was approx. 1.225 and the resting Volts ( after 5 minutes ) was 24.9. Can some one smarter than me tell from this data if the bank has a diminished capacity? Is there a different / better way to determine the capacity of the bank. I am all ears!!!
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