what size are your cables? are they big enough ? i have had an issue before with corrosion wicking from the terminal up into the wire from the battery. from the readings you have running, a little low; corrosion and or dirty connections could cause this problem.
by the way, i am in sabetha; north of topeka, 70 miles and my folks live in jacobs creek, just outside burlington; we should get together sometime warmer and shoot the poop
