{"id":6489,"date":"2021-05-31T07:24:56","date_gmt":"2021-05-31T07:24:56","guid":{"rendered":"https:\/\/notsealed.com\/?p=6489"},"modified":"2023-07-28T04:49:47","modified_gmt":"2023-07-28T04:49:47","slug":"how-to-charge-24-volt-system-trolling-motor-batteries-fast-easy","status":"publish","type":"post","link":"https:\/\/notsealed.com\/how-to-charge-24-volt-system-trolling-motor-batteries-fast-easy.html","title":{"rendered":"How to charge 24-volt system trolling motor batteries fast & easy"},"content":{"rendered":"\n

For those of us that have 24v trolling motors for the fishing boat, the hardest problem at the end of the day is how to charge the 24-volt system.<\/p>\n\n\n\n

Usually, these small electric propellor motors are wired up to two 12v car or marine batteries. These are wired in series to provide 24 volts to the electric outboard motor.<\/p>\n\n\n\n

The simple way to charge the batteries up is to use a dedicated charge controller that will either output 24v to both batteries or 12v to each battery.<\/p>\n\n\n\n

We will cover the pros and cons of each setup, and what you will need to keep your deep cycle batteries in tip-top condition. That way next time you go fishing your batteries are fully charged<\/p>\n\n\n\n

24-volt trolling motor wiring with charger<\/h2>\n\n\n
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\"24-volt<\/figure><\/div>\n\n\n

Permanently mounted charge systems for trolling motors are the way to go. You just need to plug them in at home for a few hours and you are ready for the next trip.<\/p>\n\n\n\n

I use a NOCO Genius GENPRO 10×2, 2-Bank, 20-Amp<\/a> (10-Amp Per Bank) smart charger. This thing is small and waterproof. The good thing about this setup is that it will charge each battery fully and balance them. It is how I charge my 24-volt system trolling motor batteries.<\/p>\n\n\n\n

Each output from the NOCO genius will go to each battery. So if you have a 2 battery setup get the 2 output model. If you have 3 batteries get the 3 output model.<\/p>\n\n\n\n

I like these waterproof onboard boat chargers because they are a Battery Maintainer and Desulfator for AGM, Lithium (LiFePO4), and Deep-Cycle Batteries. One charger to do them all.<\/p>\n\n\n\n

24-volt charging system diagram<\/h3>\n\n\n\n
\"How<\/figure>\n\n\n\n

How to charge multiple batteries with one charger<\/h2>\n\n\n\n

Trolling motor batteries are usually 2x 12v batteries wired in series. This makes it hard to charge multiple batteries with one charger. If you charge both batteries in series with a 24v charger they could become unbalanced over time unless you use a smart charger like NoCo Genius.<\/p>\n\n\n

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3 Bank Noco Genius Gen 3 mini charger.<\/figcaption><\/figure><\/div>\n\n\n

There are smart chargers that have sensors to charge 2, 3, and 4, 12v battery banks. Another way is to charge each battery individually. <\/p>\n\n\n\n

Unless you have a dedicated 24v battery charger you will need to use a 12v smart charger. This means you will be charging one 12v battery at a time.<\/p>\n\n\n\n

It is best to disconnect the series lead between the two batteries to prevent any polarity issues. The series lead is marked in green in the above image.<\/p>\n\n\n\n

NoCo makes this fully automatic 2 battery smart marine charger<\/a> that you can leave connected to your 2x 12v batteries. It connects to 110v AC so that you can charge both your batteries with just one charger at home. There is then no need to disconnect the series cable. I like that it is rated at 20A so it’s 10A per battery for a dual battery setup. So its fast.<\/p>\n\n\n\n

There are DC battery chargers that use your boat’s outboard engine to output 12v to a battery charger. In reality, the output to charge multiple batteries is just not viable. The amp rating of the alternator is just too low for any extra charge capacity.<\/p>\n\n\n\n

For more information check out the video below on how to Charge a 24V battery bank from a 12V boat alternator.<\/p>\n\n\n\n

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