I always top off my batteries (charge & water) and leave them in the boat for the winter w/o a charger. Never a problem. Leaving a charger on all winter or bringing them inside where it is warm is not only not necessary but IMO harmful. Just make sure you have no parasitic loads and if so remove cables.
I have a friend that burned his whole shop down using a cheap tiny battery maintainer on one of his antique cars.
Located Cape Cod, MA. I usually get 4-5 years out of a battery although the one in my car is close to 7 years. I think the self discharge rate goes way down in freezing weather and altho battery loses voltage when it is cold it comes back when it warms up. My motorcycle and lawn tractor batteries usually die an early death too for some reason but then they are stored in semi-heated shop.
I had a 2 bank Guest 3 step charger onboard and it worked fine for may years but when it gave up the ghost it did so by going to 16v and staying there. Destroyed both batteries, I bought a new one but I don't leave it on in the winter and I take the fuses out b/c I think it is a parasitic load when not charging. I know my ACR draws current all the time so I disconnect its ground too. Everything else is disconnected by the main switch.
Yeah but you had the special Alaska batteries that could handle the cold. LOL
Just what I’m thinking for my house bank, I just feel lithium does not work for me. I want to be able to start off the house bank if necessary and I don’t think lithium will do that. Also want to stick with lead acid for both because of my charger, going both AGM is an option but not sure it’s worth itHey Steve,
Next time I buy batteries I'm going with the Rolls 6V. Rolls are top shelf and wired in series they offer substantially more reserve power than an 8D.
After I wrestle those 8D's out I'm not going back. No spring chicken anymore.