wrote in message
oups.com...
Thanks for eh quick reply, Lifeline states that you can equalize at
15.5 volts and not to open the batteries. I check the voltage with no
load after about 20 min.

My Lifeline batteries do not have caps that can be removed and equilization
was strongly discouraged. At least that was the story from Concord 6 years
ago when I bought my 2 8D batteries. Using voltage to measure the state
of a battery requires the battery sit without load for 24 hours. AGM
batteries
do not behave like liquid batteries. When put under load they sag lower
than liquid batteries initially. For example, when I put a 20A load on my
fully charged bank, the voltage will drop to 12.5 or so. But it will stay
there for many hours until it knees off. Capacity of the bank is fine, just
the
voltages are lower than in a liquid bank. I've had my 2 8D Lifeline
batteries for almost 6 years under rigorous use. They still have over 90%
of their original capacity.

Doug