Originally Posted by chartscharts
My sailing habits are almost exclusively day sailing. 2-3 times a year (on good years) I'll take it out for an overnight. I could use battery powered camping lanterns on those even, since it's not very often.
I dont think you need a deep cycle battery at all.
I dont think you need 2 batteries.
I think you need one quite small battery, like a 55 amp hour one. I dont know what they call them in the USA. But one small, good battery. Walmart or some other large auto store brand battery should be fine.
I just looked up a thing and it said Group 29 is 115 amp hours. I really dont think you need anything like that whatsoever. I suggest HALF that size.
For your overnight trips , as you say, take a camping lantern etc. If you sail overnight and the battery gets low just bung on the engine for a bit and charge it