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24 V lithium battery
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Apr 10, 2024 15:52:18   #
woodguru Loc: El Dorado Ca
 
DocB wrote:
Whitey,
I took a chance and bought 3 12v 100ah lithium ions from "Dr Pepper" online for under 600 bucks. Installed them half a dozen trips back and I am amazed at the power my trolling motor has at the end of the day.... This is after long days of almost constant use looking for beds in the shallows... Trolling motor is just as strong as it is the start of a trip... Just do your research on in parallel and in series connections and on chargers.... Also, there is some controversy out there as far as using them for cranking batteries...
Doc
Whitey, br I took a chance and bought 3 12v 100ah ... (show quote)


I'll save you some heartache that can happen using multiple 12v batteries in series for 24v or 36v...there's nothing wrong with using them in series, but they like to be charged as separate batteries not connected. They will charge together, but what happens is that one battery can/will charge faster than the others, and the BMS will tell the charger the batteries are full even though two of them are not. Then as you are using these mismatched batteries, the one with the lowest charge will shut everything down based on the fact that one battery is depleted early. After many charges they start to charge really fast based on the full battery, and die really quickly based on the one that's depleted most. That crap screwed up an entire fishing season for me on a new boat. Now I use a disconnect switch and use two chargers, and then connect the batteries turning a heavy duty switch to get 24v....works like a charm.

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Apr 10, 2024 18:08:21   #
hueey Loc: Lake Fork Tx
 
woodguru wrote:
I'll save you some heartache that can happen using multiple 12v batteries in series for 24v or 36v...there's nothing wrong with using them in series, but they like to be charged as separate batteries not connected. They will charge together, but what happens is that one battery can/will charge faster than the others, and the BMS will tell the charger the batteries are full even though two of them are not. Then as you are using these mismatched batteries, the one with the lowest charge will shut everything down based on the fact that one battery is depleted early. After many charges they start to charge really fast based on the full battery, and die really quickly based on the one that's depleted most. That crap screwed up an entire fishing season for me on a new boat. Now I use a disconnect switch and use two chargers, and then connect the batteries turning a heavy duty switch to get 24v....works like a charm.
I'll save you some heartache that can happen using... (show quote)


Good point. Why I use a single 36 volt for tm an 12 volt for electronics. And a separate 12 volt for engine, bilge, power poles, lights and acc.

Thanks for your input.

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Apr 10, 2024 19:47:38   #
Whitey Loc: Southeast ohio
 
woodguru wrote:
I'll save you some heartache that can happen using multiple 12v batteries in series for 24v or 36v...there's nothing wrong with using them in series, but they like to be charged as separate batteries not connected. They will charge together, but what happens is that one battery can/will charge faster than the others, and the BMS will tell the charger the batteries are full even though two of them are not. Then as you are using these mismatched batteries, the one with the lowest charge will shut everything down based on the fact that one battery is depleted early. After many charges they start to charge really fast based on the full battery, and die really quickly based on the one that's depleted most. That crap screwed up an entire fishing season for me on a new boat. Now I use a disconnect switch and use two chargers, and then connect the batteries turning a heavy duty switch to get 24v....works like a charm.
I'll save you some heartache that can happen using... (show quote)


Sounds like good advice 👍

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Apr 15, 2024 13:29:08   #
NoCal Steve Loc: Dunnigan, CA
 
woodguru wrote:
I'll save you some heartache that can happen using multiple 12v batteries in series for 24v or 36v...there's nothing wrong with using them in series, but they like to be charged as separate batteries not connected. They will charge together, but what happens is that one battery can/will charge faster than the others, and the BMS will tell the charger the batteries are full even though two of them are not. Then as you are using these mismatched batteries, the one with the lowest charge will shut everything down based on the fact that one battery is depleted early. After many charges they start to charge really fast based on the full battery, and die really quickly based on the one that's depleted most. That crap screwed up an entire fishing season for me on a new boat. Now I use a disconnect switch and use two chargers, and then connect the batteries turning a heavy duty switch to get 24v....works like a charm.
I'll save you some heartache that can happen using... (show quote)


Sorry Whitey! The memory is not what it used to be! Lol. The brand I bought is EnjoyBot. One reason it's cheaper is a plastic case. You never want water inside a lithium battery so I mounted mine very securely. It doesn't move at all. No worries about cracking the case.

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Apr 15, 2024 19:22:02   #
Whitey Loc: Southeast ohio
 
NoCal Steve wrote:
Sorry Whitey! The memory is not what it used to be! Lol. The brand I bought is EnjoyBot. One reason it's cheaper is a plastic case. You never want water inside a lithium battery so I mounted mine very securely. It doesn't move at all. No worries about cracking the case.


Right on thanks man 👍. I'm still kind of up in the air. Some have come along ways at getting better from my research.

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