Best Onboard Marine Battery Charger in 2019

The best onboard marine battery charger is among the basic essentials that every boat owner must have onboard. There is no excuse of not having such a charger because if you don’t have it, you may get yourself into trouble after draining your battery due to all day long fishing on your boat. In the middle of the deep water, the only hope to recharge the battery on your boat is through the best onboard marine battery charger that will let you recharge your battery in a few hours and save you from getting stuck there.

Our Top Choices

Minn Kota On-Board Digital Charger
Minn Kota On-Board Digital Charger
Schumacher SC1300 Onboard Battery Charger
Schumacher SC1300 Onboard Battery Charger

We have carefully selected and enlisted the top 5 best marine battery chargers available on the market today that you can get with reliable performance and results while using onboard:



Editor Rating


NOCO GENM2 On-Board Battery Charger

NOCO GENM2 On-Board Battery Charger

Schumacher SC1300 Onboard Battery Charger

Schumacher SC1300 Onboard Battery Charger

ChargePro On-Board Battery Charger

ChargePro On-Board Battery Charger

Minn Kota Precision On-Board Charger

Minn Kota Precision On-Board Charger

Minn Kota On-Board Digital Charger

Minn Kota On-Board Digital Charger

 #1, NOCO GENM2 On-Board Battery Charger -Best Onboard Battery Charger

Noco GenM2 is a waterproof onboard battery that keeps you on board for a considerable amount of time. It has a unique recovery system that adds more power to retired batteries with some life in them. You can find its variation from 1 Bank up to 4 banks. This one is the 2 bank battery making a total of 8 amps.

This onboard battery charger has clearly labeled features that help new users understand all its functionalities. Did we mention its pulse charging mechanism? Yes, it comes with a pulse charging feature which automatically recovers sulfated batteries.

The charger is very effective at recharging 12-volt rechargeable batteries. It can be used on a wide variety of models, including MF models, gel, and AGM models. But one flaw with the charger is its propensity to overcharge at times.

This charger features industry-leading technology that ensures simplicity when charging. It is very safe to use and will not generate sparks. It also guards against overheat, open circuit, short circuit, and battery hookup. Overall, the charger is one of the safest and efficient chargers you can find right now.

 #2, Schumacher SC1300 Onboard Battery -Charger Best Agm Battery Charger

Are you looking for a fast charging mechanism to easily boost your battery power? This supercharger with microprocessor might just be the answer. It comes with a 3Amp maintaining facility to make sure batteries do not lose too much power when plugged.

The reverse polarity feature informs you with a LED light to show when the battery has been attached. The LED light also displays the charge percentage as it monitors the charge rate for you.

No matter the type of configuration you want, this charger is versatile. It can handle different types of configurations with the 12 amps or 6 amp charging process.

However, it does not support more than one bank. It’s a single bank charger, which may not be great for some users. It comes with a durable carry handle for portability.
The charger also indicates a reversed polarity through the LED light. Overall, Schumacher is a top quality onboard battery charger that has impressed everybody.

 #3, ChargePro On-Board Battery Charger - Best Battery Charger

Chargepro is a professional grade battery charger with sense-send technology. The charger correctly determines the extent of charge each battery needs. It then supplies the battery with the exact power.

This is a new innovation in battery charger technology. It makes sure you don’t have any problem of overcharging that is common with some battery chargers.

Chargepro is compatible with both Gel and AGM batteries. It comes with a microprocessor which ensures accurate charging. It is an effective and reliable digital battery charger that is very safe to use.

It makes use of amperage charging instead of the distributed charging common with some other models. This makes it easy and faster to completely charge your batteries.
The Chargepro charger is waterproof, so you don’t have to worry about the weather. And its simple design makes it perfect for new users. The charger completely worth every penny you pay for it.

 #4, Minn Kota Precision On-Board Charger - Best Battery for Minn Kota

If you are looking for a perfect onboard charger that can stand the test of time, your search ends here. There is one major problem with onboard chargers, and that’s the fact that they reduce charging ability after a short time.

Minn Kota has its solid footing on durability. This precision onboard charger comes with the most sophisticated charging technology such as battery equalization, selective battery type, low power-line compensation, and digital controls.

This charger is UL listed and FCC complaint about safety and efficiency. Other features of the charger include ignition protection, reverse polarity, as well as a short circuit.
With an aluminum construction, you are dealing with a superior quality product that is vibration, shock, and waterproof resistant.

If you have pricey battery types such as AGM, HP, and Gel, this battery charger will be perfect for them. They may not be the cheapest in the market. But their durability and top features surely outweigh the price tag.

 #5, Minn Kota On-Board Digital Charger - Best Portable Marine Battery Charger

Here is another properly built onboard battery charger. It is a premium quality charger that is very reliable and affordable.

One thing about this Minn Kota charger is its availability in different charging capacities. You can opt for 4-bank 40 amps or a single bank 6 amp, depending on your charging needs.

It is ideal for AGM batteries and lead batteries. It effectively monitors the temperature and voltage to prevent your battery from overcharging. Its excellent digital charging technology is the proper technology for charging, conditioning, maintaining, and protecting your boat.
There is a 3-year warranty provided for the parts of the charger. For safety reasons and efficiency, the charger comes with a LED light indicator to show your charging status. Moreover, the onboard charger is shockproof and waterproof. There is no cause for alarm in any weather condition.

But they are a bit heavy because they are epoxy filled. This should not be a big problem if you are more interested in safety and efficiency.

FAQ Best Onboard Marine Battery Charger

Q: What is an onboard marine charger?

A: An onboard marine charger is a charger that charges the battery while still on the boat and does not need to get it hooked anywhere else. The charger charges the battery with just putting in the AC cord and helps recover the charge in a few hours. These chargers are portable, easy to accommodate and help in emergency situations as well.

Q: What are the best brands for onboard marine battery chargers?

A: MinnKota, Schumacher, NOCCO, ChargePro are the best marine battery charger brands for reliable performance. You can compare and choose the best battery charger depending on your preferred number of banks and the features you need. Make sure to check if the charger supports AGM batteries if you are using an AGM battery on your boat.

Q: Which Amps of marine battery charger would be charging the battery in the best way?

A: A 12 volt/10 amp battery charger would be the best one to charge a marine battery.

Q: What is meant by 2 bank battery charger?

A: Marine batteries chargers come up in variations like 2 bank or 4 bank chargers. A 2 bank battery charger is the one that offers charging capability for 2 of the 12-volt batteries. Whereas a 4 bank battery charger allows 4 of the 12-volt batteries to be charged.

Q: Do AGM batteries need a special type of charger?

A: Yes, you must look at the compatibility of the marine charger with AGM batteries. In case if the manufacturer has mentioned its capability then it will be compatible otherwise it would not charge.

Q: Which features should we look for in an onboard marine battery charger?

A: An onboard marine battery charger must be compared on the basis of the features like the 2 bank or 4 bank capabilities, reverse polarity protection, size, weight, portability, LED indicator for charging and not charging or complete charge mode, number of hours to recover, etc.

Q: Do AGM batteries last longer than flooded batteries?

A: Yes, AGM batteries may last longer than an average flooded battery if handled, used and maintained in a proper way with suitable accessories and attachments. The batteries may last from two to five years depending on the use and maintenance.

Q: Do you have to overcharge the marine battery for a long time use?

A: No, overcharging is not recommended for any kind of batteries. Overcharging damages the battery and may not help for longer use. Make sure you have the charger that indicates when the battery is fully charged.

Now that we have discussed the best of the best onboard marine battery chargers here, you can see that there are options for everyone to choose from the various types of chargers offering AGM and Flooded battery charging capability, the number of banks provided in the charger, reverse polarity protection, and the easy maintenance. You just have to select the charger that offers easier use and may be enough to recharge the batteries you have onboard.

Checking the compatibility first may help in reducing the negative outcomes easily. It is better to choose the reliable charger that may let you recharge the battery without any issues and within the time that you need.