
How many batteries do I need to have on my boat and what kind of batteries.?
I have a 1982 Mckee craft 17ft boat with a 140 horse power evenrude engine. Along with that there is also a livewell, 2 speakers, fish finder, and VHF. I was wondering how many batteries I would need to run all that and what type of batteries for each?
You "NEED" only one battery. It can supply power to start and run all your equipment. However, if you shut down and use the accessories for a long time the accessories could drain your battery leaving you without enough power to crank the engine. The best setup would be to have a dual battery system with a battery switch that allows you to use #1battery, #2 battery or both at the same time. It can be set up so that one battery is the starting battery and the other is the "house" battery that handles all the systems besides starting. If any one of them gets run down you can switch to "both" batteries for starting purposes. You can use a Group 24 or 27 Marine starting battery that may have about 600-800 CCA (cold cranking amps) for engine starting and a Marine deep cycle battery for the house battery. A deep cycle battery is made to be discharged and charged many times without hurting its life span.
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