Re: [Amel Yacht Owners] Re: AGM battery equalisation
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I believe that the 12.3 battery has failed. The 12.5 batteries are nearing the same point, with probably less than 1 year.
I would disconnect the pair that has the 12.3 and move things so that one of the 12.5 batteries is also disconnected. In other words, 1 pair of the worst batteries are disconnected from the bank. Then I would start looking for the best place to buy and replace all of the batteries. I am going to guess that you should do this within about 6-8 months.
I am sure that you will find some owner that gets longer than 4 years life, but I will assure you he is not discharging his batteries at anchor as you are. I met a guy in Turkey who according to him got 12 years life from his batteries. Within 5 minutes of leaving the marina, they failed.😀