Pontoon Boat & Deck Boat Forum

My boat came from the factory with two batteries and the system automatically charges which ever one needs the charge, the batteries are now 4 years old and I want to replace them, my question is can I get a larger house battery dual purpose with 160 minutes reserve and get a starting battery with 1000 marine cranking amp starting battery the motor is a 115 hp Yamaha does it matter that the batteries are of different sizes ?
Thanks

While I don't think it will make any real difference I'd least keep both battery in the same size group size and from what I can see you picked a group 24 starting and a group 27 house battery. Myself I'd pick 2 exact marine deep cycle/starting group 27 batteries and be done with it...

You want both batteries to be the same. In case you've not bought a battery recently, the prices are way up.

Since I don't use a trolliing motor or have a big power booster on my radio, a single battery is preferred for me.

i've been running a dual battery setup with an ACR for 5 years. i don't recall the exact specs, but my house battery is different from my start battery. something like you are describing. i haven't had any problems.

I don't think you mentioned if one or both batteries were testing bad.

Your boat, your money, but my I sold my offshore center console after 11 years with the original batteries. All 3 batteries tested fine after 800 hours on both engines.

Me, .. I'd keep a portable power supply handy if I had doubts.