Here is the scenario. I have an Ontario
32 with two house batteries and one starter battery
in the nav station seat. No battery
boxes or restraint, and a complete rats nest of wires going to the terminals under wing nuts. I can't check the water
levels without removing the wiring
in the whole compartment. This install is clearly broken on so many levels.
I have made a WAG of my daily A-h requirements, and I would like to be able to survive 3 consecutive cloudy days (that is solar
is the preferred energy source) before resorting to fossil fuel charging
while away from shore power
. This leads to about doubling the house battery size into the 400 to 500 A-h range.
My impression is that it is real hard to beat golf cart wet cells in terms of their deep cycle robustness, favorable cost, and life span, as long as one is willing to do the required maintenance
. Four of these would be my solution except for the fact that I would like my house battery set to be located in the bilge
. GC batteries won't fit in the height dimension.
I am about 80% sure I can get four group 31s down there, and about 99% sure I can get four group 27s down there. I would likely make custom GRP battery boxes to implement this solution.
My question after all the above, is do batteries of equal deep cycle performance to GC batteries exist in either group 31 or 27 form factor, and if so, what makes are recommended? I ask because I have the impression that so called deep cycle batteries in these sizes are usually dual purpose and not as robust as true deep cycle batteries. I am particularly interested in what I might actually find in Ontario
If nothing exists similar to GC, then I would consider some alternatives. I have not actually pondered access yet, but choice 1 might be to go with batteries accessible from the port lazarette, but this is likely to have weight distribution and access issues. Choice 2 might be AGMs mounted not vertically in the bilge
, but I don't like the cost and other negatives of AGMs. Choice 3 might be take whatever is on offer in Group 31 wet cell even if not a really good deep cycle battery.
Thanks for input.