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Yeah. Another lithium battery question.
I’m considering a 24 volt lithium battery system for the boat. Pulling cranks is only getting me about 4-5 hours currently.
I’ve done some research but can I realistically expect extended trolling time with lithium??
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Doesn't matter what battery you use. Only things that matters it how many amps (per hour) your TM draws vs. how many amp hours the battery is rated for..... Now you might shave a few lbs off your boat by switching but it won't affect your amp draw.
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Depth of discharge will be relevant in your case. A lead acid battery should only be discharged to no less than 50% of it's capacity if you expect it to last for a number of years. If you are pulling it completely empty until it stops working in 4-5 hrs (damaging the battery) then as already said there is not much gain in going Lithium. If you stop use at 50% on the lead acid set up then you will get longer run times from the Lithiums as they can be used completely with no negative effects.
Chris
Are you saying that a battery should limit/ dictate your fishing time?Quote:
Originally Posted by NCkenner
I’m confused now. I’ve run my 70lb MK riptide auto pilot for 7 hours non stop on 2 series 29 Walmart batteries and was still going good when I headed in. It was in a heavy bass boat and windy conditions several times. Not throwing stones at anyone, just looking to understand what you and I did different.
What speed you running? I’m in a 20ft bass boat at 1.6 mph or up. Just curiousQuote:
Originally Posted by skeetbum
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In addition to what everyone else says, your Amp draw is also dependent on the gauge of wire. Smaller wire draws more amps.
I run 2-new 31 series batteries on one boat and 2-100 amp lithium on another.
If space and weight is an issue go with lithium. If not, get 2-new 31 series batteries. Don’t know how long of a run you have on wiring but don’t go smaller on wiring than 8 gauge for a 15 ft run. Go 6 gauge if you can or larger.
Your trolling motor shouldn’t draw more than 60 AH on high.
Either system should work for you.
Also invest in a good MinnKota breaker. Hope this helps.
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In addition to what everyone else says, your Amp draw is also dependent on the gauge of wire. Smaller wire draws more amps.
I run 2-new 31 series batteries on one boat and 2-100 amp lithium on another.
If space and weight is an issue go with lithium. If not, get 2-new 31 series batteries. Don’t know how long of a run you have on wiring but don’t go smaller on wiring than 8 gauge for a 15 ft run. Go 6 gauge if you can or larger.
Your trolling motor shouldn’t draw more than 60 AH on high.
Either system should work for you.
Also invest in a good MinnKota breaker. Hope this helps.
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In the case of the OP, batteries are dictating his fishing time to 4-5 hrs and he has requested our opinions to improve that. I’m no battery specialist but I’ve read a lot of articles on the subject due to interest in lithium technology for myself.Quote:
Originally Posted by chaunc
I’m simply stating that lead acid batteries that are completely discharged at each use will have a much, much shorter life than ones discharged to no more than 50% and if you want yours to last you’ll end your fishing trip when you reach that level to prevent the reduced life.
One of the big benefits to lithium is they can be discharged fully with no negative effects (similar to cordless tool batteries) meaning you get additional run time unless you plan on punishing your lead acids.
Don’t take my word for this, put in some time doing google searches and reading/learning for yourself. There’s a lot of info out there and when you read multiple sources with the same info, you can probably count on it being factual.
Chris
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The lithium batteries drain at a constant rate, no need to turn up the motor to keep the same speed. Constant amp draw the whole time, and can be discharged to about 15% of their capacity before they just stop, the lead acid and agm will slowly die to about 30% and then you will have to stop.
The math is more complex, but you will get twice the runtime pulling at 70% throttle with a 100ah lifepo vs a 100ah lead. Minnkota says their motors are not to be used above 80% for more than 2 minutes at a time with lithium or something like that, might want to look into that.
You will not believe the difference until you try them. A buddy upgraded this year and I am still amazed at them. Im hoping to get one more year out of mine before i switch.