12.5v is fine. Just charge them up. 12.7 is full 11.7 is empty. So you're about 20% down. Always test state of charge voltage with no load.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Jul 16, 2017 6:38 PM, "Tom Buscaglia via CnC-List" <cnc-list@cnc-list.com> wrote: > I stressed out m house bank pretty bad by leaving the frig on and the D.C. > On, but the shore power, and this the charger, came lose on the boat due t > my sloppy connecting. > > It was discovered after 3 days or so. I am concerned that the batteries > may be damaged beyond use...just like the set of house batteries these > replaced, after two full days at anchor with the frig runningh. > > Very lagged with them all still wired into the boat are around 12.5. 13.2 > when the engine is running and 13.7 with the charger on. > > Some questions for the list's cumulative wisdom... > > Do I need to disconnect the battery to accurately assess its health? > > Are these voltages in an appropriate rage? > > thx > > Tom Buscaglia > S/V Alera > 1990 C&C 37+/40 > Vashon WA > P 206.463.9200 <(206)%20463-9200> > C 305.409.3660 <(305)%20409-3660> > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > >
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