SailNet Community - View Single Post - Battery Buyers = Good News
View Single Post
Old 08-07-2011
hellosailor's Avatar
hellosailor hellosailor is offline
Senior Member
Join Date: Apr 2006
Posts: 11,225
Thanks: 4
Thanked 119 Times in 116 Posts
Rep Power: 11
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Deep cycle conventionally means thick plates, designed to last a long time. A thick plate cannot supply as high an impulse current as thinner plates, so an SLI (Starter-lights-igntion) battery uses thinner plates.
A "dual purpose" battery uses plates somewhere in between.

What do thick and thin mean? Varies with the maker.

And the makers will all tell you, you can use deep cycle batteries for starting with no problems, as long as your battery bank is large enough to supply the impulse power your starter needs. i.e., you don't use a 50AH rated deep cycle battery as a starter for a big diesel. But a 400AH bank won't blink at the power need. (Depends on what you call "big", I know.) And on the other hand...yes, I've used a 17AH AGM backup battery to start asmall diesel. It didn't mind in the least, but I would use it that way on a daily basis.
Reply With Quote Share with Facebook