1990 SR Sundancer 310DA Battery Config

[Crash4723]

So I bought this boat last year and did a complete rebuild on both engines. She had two deep cycle battery's and one cranking battery connected. I replaced all 3 batteries but now I am a little confused and I'm thinking maybe someone screwed something up in her previous life. From what I have read thus far, each engine has its own battery to crank from, and I've read some posts that claim port side electronics run off the port engine battery, and starboard electronics run off the starboard engine batters.. So why do I only have 1 actual cranking battery and two deep cycle batteries? In my RV days the deep cycle batteries ran the house.

Does anyone know the original battery configuration for this year and model?

 

[jthatcher]

The base layout is port side crank only, starboard with 2 batteries with one for house. Optional upgrade adds a house battery next to the starboard fuel tank for a total of 2 and starboard engine on its own battery that does gen as well. You will have 2 battery switches if this was installed originally.


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[jthatcher]

Glad to have another 1990 310 onboard.


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[Crash4723]

There are definitely two battery switches in the main breaker compartment.

 

[Crash4723]

So, as we are ironing out the wrinkles on this old girl, we decided to relocate and re-configure the batteries. I have 1 1,000 CCA cranking battery and 2 DeepCycle house batteries. Obviously the goal here is to run the house on the 2 DeepCycles and keep the cranking battery strictly for cranking.

I have two disconnect switches. 1 is a simple On/Off switch. The other is a 1, 2, Both, Off switch. I'm a little confused about where all these things should tie in, but I have the two deep cycles wired together and one positive lead coming into the disconnect switch area. Then the cranking battery positive lead comes into the disconnect switch area. So when I go to start the engines I should be on #1, then once running I should switch to Both?

Also, I have a 3 bank charger. I have 1 lead connected to the cranking battery. Should I run a lead to each of the deep cycle battery's or should there only be 1 going to them since they are wired together?

Then, will all batteries charge when the engines are running with the battery switch on #1, #2, Both? I'm confused.