12v marine/deep cycle batteries

The Interstate marine batteries are probably the best 12v dual purpose batteries to be had from my extensive research. The SRM-29 is 115 a/hr @ the 20 hour rate. Two would give you 230a/hr which is plenty for the occasional boondocker with 200w of solar. Jeff Barron is an Interstate engineer I spoke with, he suggested starting at 14.4v absorption, 13.4v float & 15.2v equalization. If the specific gravity is 1.275 or greater, leave it there. If under that, bump up the absorption to 14.6v. Unfortunately we never got around to using the SRM-29's with solar, but the progressive dynamics PD4655 did keep them well & healthy for +3yrs, they never died nor gave problems. We're now going with a GoPower 160w kit & 2 6v Interstate GC2's. I have no doubt the SRM-29's will last another +2yrs in my fathers TT, although he doesn't boondock like us....... If I was to use the 29's again I'd consider the new Pro-29M. They have the cycling performance of an AGM.


http://www.interstatebatteries.com/m/category/rv/rv-deep-cycle

http://interstatebatteries.ca/wp-content/uploads/2013/07/Marine-RV_DeepCycleBooklet_PN200004_Printable.pdf