I’m new to owning a bigger boat. I own an ’05 1675 magnum alumacraft and bought a 70 lb. 24 volt trolling motor. My question is what size batteries do I use. A 24 or a 27 size? I know 27 will last longer, but how much with this size trolling motor? Is it really worth it or not? Any recommendations on a two bank charging system? Any advice or additional thoughts on this would be great. Thanks Ray.
If you spend all day on the water, bigger is better. Usually it only a modest price jump to size up. So if you spend 30 more and get 4 years out of them, the cost isn’t too bad
Group 27 minimum. Look at prices and put in the largest battery that will fit in your trays and that you are comfortable with the price tag. Consider a 3 bank charger so you can keep your cranking battery charged as well. Long days on the water running locators, pumps etc. will take a toll on the cranking battery.
The boat has only one battery tray. I have to mount one more tray or a two battery tray. My fishing plan is a “weekend warrior” or at least take the kids out when school is out in May/June.
IMO, you’re gonna want a total of 3 batteries. 2 for the trolling motor and 1 cranking battery to also run your accessories.
As big as will fit! Onboard charger is the way to go
29 or 31’s for a trolling motor. My boat gets between 5.5 – 6 hours on 29’s and an average speed of 1.7 mph.
I already have one separate battery dedicated for turning over big motor. I will have a charging system in place too. It just takes time and of course money. Weekend project coming soon to me.
IMO, you’re gonna want a total of 3 batteries. 2 for the trolling motor and 1 cranking battery to also run your accessories.
You’re gonna want a dual purpose battery for your starting battery if you run multiple large graphs and/or lights/accessories. Those will quickly drain a starting battery enough that it cannot turn the motor over.
I found that out the hard way at the end of last season when I upgraded graphs to dual 10/12″ and had to jump my group 27 starting battery multiple times from my dual group 31 trolling batteries. I’m going to get a group 31 AGM dual purpose battery today actually. I need it for next week.
<div class=”d4p-bbt-quote-title”>nailswi wrote:</div>
IMO, you’re gonna want a total of 3 batteries. 2 for the trolling motor and 1 cranking battery to also run your accessories.You’re gonna want a dual purpose battery for your starting battery if you run multiple large graphs and/or lights/accessories. Those will quickly drain a starting battery enough that it cannot turn the motor over.
I found that out the hard way at the end of last season when I upgraded graphs to dual 10/12″ and had to jump my group 27 starting battery multiple times from my dual group 31 trolling batteries. I’m going to get a group 31 AGM dual purpose battery today actually. I need it for next week.
Good point on the dual purpose. I forgot to mention that as I have a dedicated deep cycle house battery to run all my electronics and a dedicated cranking battery.
I run 29’s only because they came with the boat and I haven’t had any issues.
my 36V will run all day in heavy current and actually half of another day until they die… Don’t ask me how I know this.
I would say 27’s would work, but I would go 29’s if you can fit them.
I’m new to owning a bigger boat. I own an ’05 1675 magnum alumacraft and bought a 70 lb. 24 volt trolling motor. My question is what size batteries do I use. A 24 or a 27 size? I know 27 will last longer, but how much with this size trolling motor? Is it really worth it or not? Any recommendations on a two bank charging system? Any advice or additional thoughts on this would be great. Thanks Ray.
Ray,
A group 27 is ideal but the 24’s will be just fine for what you are describing and plenty for most us fishermen. Unless you are running all day super hard, I’d shoot for 27 or larger. Or if you run all weekend and don’t have a way to recharge the batteries.
That said, sometimes a good batter will last longer than a bigger battery. I’m a huge fan of AGM batteries. Not only do they seem to last longer on the water, I’m getting around 8-10 years out of them with moderate use.
Regarding chargers, I like my cantinas advanced angler series but not sure what happened when BPS bought them out. I also had a guest charger before that and I never had issues with it.
Most chargers allow you to mix lead and AGM batteries but not gel so conserving buy two alike batteries (don’t mix with gel).
You must be logged in to reply to this topic.
