How are your house Batteries used?

[HGM]

After checking, my 12 volt system has me confused. My batteries go down in just a few hours when on the hook. I replaced both house batteries and had the same problem. Figuring I had something pulling the system down, I stated checking amp drain with a DC amp clamp. What I found is that the entire House is being powered from the starter battery. The two parallel wired house battery is only connected to one engine. The boat is a 91 350 gas. It has the original charger. From what I can see, everything appears to be wired in its original position. The batteries can only go in one position.

I have now checked with Sea Ray customer service about the problem. They said that in the early 90's they installed 3 deep cycle bateries and used only one to power the house. Does this sound familar to anyone?​

 

[HUMPH]

Sounds like time to reconfigure your battery banks.

 

[HGM]

I agree. Does anyone see a problem if I just switch them?

 

[sr330daguy]

See Above

 

[chandalen]

Switching the batteries how?

My boat is wired to a starter battery and house battery are on the same switch. 1 BOTH and 2. #1 is my starter, Both is well.. both, and 2 is the bigger house battery. When on hook, I leave batteries at 2. I also have the fridge set to 110v power. The battery charger I have and have had are strong enough enough (10 amps) to offset any draw the boat has on the battery. (esp since I upgraded to LED lights).

I cant imagine what could cause your batteries to drain so rapidly while plugged into shore power (esp while connected to a charger). That leads me to believe that the batteries could be bad and not holding a full charge, or the charger is not charging correctly.