Batteries on a 2010 300 slx

[Chopperslb]

I have a 2010 300 SLX. I recently went to replace the 3 batteries. I assumed that I had 2 cranking (1 for each motor) and then 1 deep cycle for the house battery. Especially because the old batteries I had 2 Interstates that clearly said cranking on the top, and the 3rd was a West Marine that I couldn't tell what it was other than a 27 group.I replaced the 2 Interstate cranking batteries first and verified that only one engine would start off of each. Then pulled the the 3rd battery(West Marine) only to find out that it also was a cranking battery. So my question is, what set up should I have for this boat? All cranking, 2 crank 1 deep cycle? Also does it matter where they are placed if I use a deep cycle for the stereo, and when I upgrade the stereo should I hook directly to the deep cycle for the amplifiers? The boat has twin 350's, with no show shore power, or charger. Has a fridge but we don't use it if that matters.

 

[Seapig]

Some of that seems odd. Usually the starboard batteries are the “house” batteries that run all of your lights and accessories. They are also the starting battery bank for that engine. Dual purpose or deep cycle would be my choice.

I suspect you may have one starting battery for your port engine and a pair (wired in parallel) for starboard.

I’m surprised that you don’t have an on board charger

 

[Chopperslb]

I was surprised that it didn't have a charger either. It has a ton of options like windless, extended platform, upgraded stereo, JOYSTICK! But no charger. The 2 outside batteries both have a set of identical small hot and ground wire that are fused, and the middle battery does not. Not sure what the wires are for, but I originally thought they were for a charger.

 

[Seapig]

Does it have a shore power setup?

I’ve never seen a Dancer without shore power and charger

 

[Chopperslb]

Nope. No shore power either. No generator. I plan on adding a charger.