Re: [Amel Yacht Owners] My batteries are dying.
Hello Steve;toggle quoted messageShow quoted text
Your battery monitor is calculating the charge percentage. These calculations could easily be erroneous based on several different factors.
Typically AGMs charge at around 28.4 volts and float at 27.2. These voltages vary based on battery temperature if your chargers have temperature feed back from your batteries. A voltage of 25.95 in float sounds low.
The main read out from your monitor that does not involve any calculations, is the amount of amps drawn from your batteries.
I suggest turning off the charger and turning it back on after a few minutes, and let it go through all stages of charging until it has reached float. The batteries should now be at 100% charge if your charger is functioning correctly. Again 25.95V sounds low.
Once in float, reset your battery monitor to zero Ah and then turn off the charger and use the batteries as you normally would. You should roughly have used about 30% of your total Ah capacity by the time your battery voltage reaches 25 volts. For example if you have 500 Ah total at 24volts, you should see 150 Ah used.
These are very rough guidelines and can vary based on many different conditions. However you should be in the ball park. If you are way off then something is not right.
I would chase down the smart charging algorithm of your charger. Sometimes they need to have updates in order for them to function correctly. This has happened to us and the update resolved the issues.
Mohammad & Aty
AMEL 54 #099
On Jul 21, 2018, at 5:32 PM, Steve Bode stevenmbode@... [amelyachtowners] <amelyachtowners@...> wrote: