So a few months ago I replaced my single deep cycle battery with 2x6volt batteries. I have used them for multiple weekends with no issues, but after a few charging cycles my monitoring station is showing they are low even though I just fully charged them with my independent 12v battery charger.
I know the stock battery monitoring system isnít that great.
Here is the process I followed and pics below:
1. I fully charged my batteries and then let them sit for 24hrs.
2. They were sitting at 12.7v after the 24hrs.
3. I used my battery tester to test all the cells. They all measured 1.30 at the top of the Good range.
4. However when I check the on board system the batteries say they are only 3/4 full and if I run the pump it drops down even further even though the voltage always seems to stay above 12v etc.
Does this just mean that the on board system is flaked out? I keep my digital voltage reader plugged in at all times and have a voltage chart I found online. Is this the most accurate way to do it?
I just want to make sure my batteries are okay, since they have a 12 month free replacement warranty that I can use if they go bad this year.
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