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Both Batteries Drain Even When Only Bank Is Selected
I have recently purchased a 1982 Pearson 37. I have spent the last month discovering the things that let's just say the previous owner failed to mention and the surveyor failed to find. It's a great boat, but in need of some love, cash and a lot of elbow grease. I have three batteries that I know are not properly wired. One deep cycle type 24 paralleled with a wet 4d for my #1 and a single type 24 deep cycle for my # 2. I think they are all of different ages and plan on scrapping them before next season. I have a "new" 85a alternator with internal regulator.
My problem is that with the selector switch off all three batteries will hold a
decent charge for several weeks. With only #1 or #2 battery on overnight with just a very small hotel load, both #1 and #2 are dead by morning.
I have checked draw on the main distribution panel and after thinking I had an aha moment found the vhf wired to the hot bus.This accounted for the draw when the panel was 1st energized.
The only thing common besides the switch is the alternator.