29 series battery to a 24?

[jadssh]

Hello all, I just received my new boat and installed my Minnkota Terrova 80 Bowmount which is a 24 volt system. The battery compartment in my new boat will not allow me to use my two 29 series battteries I was using with my old boat due to space. I can fit 2, 24 series batteries in the space. The 24 series batteries i'm looking at is the Everstart 24DP-4 which is rated at 105 amp's per hour. The trolling motor requires at least a 100 amp's per hour according to the manual. I usually troll 6-8 hours when I go out for the day of fishing. Do you guy's think that these batteries will give me the trolling time I need?

Thanks in advance for the help. John

 

[labawg]

Re: 29 series battery to a 24?

If your going to be trolling six to eight hour for each outing then you might be better off with 24DC (deep cycle) instead of 24DP (dual purpose) batteries. DP are a hybrid battery (not true starting nor a true deep cycle battery). They can do both but will not give you the life you may be after.

 

[j_martin]

Re: 29 series battery to a 24?

Trolling time depends on the speed you run the trolling motor. There should be a guide with the motor, maybe even right on the motor.

Seconds on the DC batteries. You'll wreck starting batteries fairly quickly deeply discharging them. The DC batteries can take it a bit better.

Dual purpose means not quite up to either one, unless you're talking light duty.

 

[Silvertip]

Re: 29 series battery to a 24?

You are misunderstanding battery capacity as well as the current consumption of your motor. Your motor is an 80# thrust, 24 volt unit and at its maximum current draw it will suck 56 amps out of the battery for every hour it runs at that draw. So a 105 A/Hr battery (two of them) would last only two hours at that maximum draw. By the way, a 105 A/Hr rating means the battery can deliver 105 amps for one hour, or 1 amp for 105 hours. In your case, 56 amps for about two hours. Since you will be operating the motor at far less than the 56 amp condition, you may see 5 -6 hours. This would of course be continuous operation but since most trolling is either quite slow continuous, or on-0ff operation how long the motor will run depends on how you use it.

 

[j_martin]

Re: 29 series battery to a 24?

Actually, amp hour capacity is rated at a fairly low draw, and at high discharge rates is considerably diminished.

 

[jadssh]

Re: 29 series battery to a 24?

Thanks guy's that is some excellent information. I will go with the deep cycle and pick one that has the most amp ratings. Thanks again everyone! John