Surprise SG on 2 of 12 cells
A quick history on 4 S550 rolls Surette batteries . Installed March 2019 in a 12 V configuration SG readings approximately every 3 to 4 months. Readings are generally taken in the morning and are usually 1.200 to 1.240 . I have rarely seen .010 differences and commonly.005. However today I was in the hole and decided to check one cell as I randomly do and lo and behold it was 1.220 which I did not expect as it was the end of a good day of sun so I checked another one and lo and behold it was 1.265 😳 so I checked them all and they were all between 1.260 and 1.270 except for two which were on different batteries. So of course my question is is this something to worry about ? I will of coarse be watching them now but unfortunately I will be away for several days. Is this a sign I need to do an equalizer? Because these are on two different batteries can I discount corroded terminals ?
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