10 Best Marine Battery Chargers (Buying Guide 2021)

You’ll find many types of battery for your boat like- AGM, Gel, Lead Acid and Lithium Ion. Each technology has its own standard charging profile. Following the charging profile of the battery will help you to maintain the health of the battery.

Proper maintenance of the battery and selecting the right type of battery charger can increase the lifetime of the battery and provide you the support you need on- board.

But choosing the right one can be difficult as everyone claims their charger is the best. Maybe they are right but you can’t buy any one of them randomly without knowing what will be really good for your battery or not. Because different types of battery need a different charger.

So what best boat battery chargers should you use? To answer your question, here are the top five best marine battery chargers that will get rid of any worries you might have about selecting a charger.

Hope this guideline will help you to pick the proper charger for your marine battery.

Editor’s Recommended top Chargers Comparison

MinnKota MK-105P 5 amps Battery Charger
  • Brand: Minn Kota
  • Weight: 4.12 Pounds
  • Dimensions: 8.25 x 8 x 6.9 inches
See on Amazon
Schumacher SSC-1000A SpeedCharge Battery Charger
  • Output: ‎2/6/10 Amp
  • Dimension: 3.3 x 10.8 x 7.5 inches
  • Max Weight: ‎3 pounds
See on Amazon
NOCO Genius G750 6V/12V Smart Battery Charger
  • Color: Gray
  • Dimensions: 6.5 x 3.75 x 4 inches
  • Weight: 1.08 Pounds
See on Amazon
NOCO Genius GENM2 Board Battery Charger
  • Amps Per Bank: 4A
  • Color: Black
  • Weight: 5.8 Pounds
See on Amazon
Schumacher 6/12V Battery Engine Starter
  • Voltage: 12V
  • Battery Type: Standard, AGM
  • Display Type: ‎LED indicators
See on Amazon

Top 10 Marine Chargers Reviews

1. NOCO Genius 6V/12V 3.5A Smart Battery Charger

NOCO Genius 6V/12V 3.5A Smart Marine Battery Charger

There is hardly any battery in the market that is as versatile as the G3500 battery charger from NOCO Genius. It is cheap, protected from overcharge, reverse polarity, overcharge and goes with a wide range of batteries. From RV, AGM or automotive batteries to garden batteries, everything can be charged and repaired with this battery charger.

This 3.5 A charger will make 6v and 12v batteries even better than before.  It arrives with an x connect clamp, eyelet terminal and a 5 years long warranty card. For the priciest batteries, the warranty offered is not that long.

It is a lightweight and pocket-sized charger. Convenient to carry around outdoors, campaign or at home. For its small size, it doesn’t have any display. Rather it has an LED to show battery charge status and info related to the diagnosis.

Some have complained over its poorly done soldering of the inside circuit and different parts. But I never heard of anything related to its performance. Maybe the poor quality will not affect its service. For me, it is the safest buy for its price.

Things We Liked

  • Cheap price;
  • Well protected;
  • Monitors and repairs;
  • Portable. 

Things We Didn’t Like

  • May not be durable.

2. WEEGO Jump Starter, Battery and Smart Device Charger

This charger from WEEGO is not only for batteries and engines but also for any device! It comes with a USB port and cable to charge laptop, tab and mobile phones. The 3 pin wall charger and adapters are for powering up the rest of the household items. One charge in this charger is enough to ensure a year’s worry free service!

Both diesel and gas engines are compatible with the JS12 charger cum starter. For gas, 6.4 L and for diesel 3.2 L engines are ideal for this charger. Its peak rate is 1400 Amps and delivers 400 true crank amps.

LED lighting functions are a great addition for handling this charger and its additionalities in dimly lit places. This is also handy to carry in camping as well. This unit is a bit pricey but the price is reasonable. For the impressive versatility, one must pay the worth.

Things We Liked

  • Long life;
  • Versatile use;
  • Reasonable price;
  • Compatible with both gas and diesel engines.
  • Comes with additional necessities and a case. 

Things We Didn’t Like

  • No cons.

3. Marinco ChargePro 10 amps, 3 Banks Battery Chargers

10 amps Battery Chargers

With the most basic features, this charger is the easiest to use. If fancy and smart batteries confuse you then, you may find this specially meant for your requirements. It has 3 banks to charge batteries of up to 10 amps each. With LEDs, it shows the charging state and lets you know when the battery is full. 

Please note this is not an engine starter nor a monitor or maintenance device. This is a classic style marine battery charger of 120/230V. It may not display the voltage or amperage but its microprocessor will successfully deliver the right amount of charge for selected batteries.

With around 15 pounds, this battery is not as portable as its other competitors, but it’s not big. It is functional and does charge batteries properly. So, for easy and hassle-free use, why not consider this charger for your batteries?

Things We Liked

  • Easy to use;
  • Basic features;
  • Can charge multiple batteries at a time. 

Things We Didn’t Like

  • Not a car starter;
  • Not portable. 

4. MinnKota MK-105P 5 amps Battery Charger

MinnKota MK-105P 5 amps Battery Charger

This charger is perfect for small capacity deep cycle marine batteries and the like. It has only one bank to charge one battery at a time. It is a 12v charger and is protected from short circuit and reverse polarity. 

It is another basic charger with simple minimalistic functionalities. It is easy to use and is portable as well. Its charging state is indicated with LED lights. There is no possibility of overcharging your batteries. Once the battery is full, this unit simply moves to trickle charging mode to protect the battery life.

MinnKota has been one of the most trusted and widely used manufacturers of marine items for several decades. As the makers, this charger is also trustworthy that it will go a long way with a minimal charge.

Things We Liked

  • Suitable for small batteries;
  • Portable;
  • Easy to operate;
  • Economical price.

Things We Didn’t Like

  • For 5 amps battery only.

5. Schumacher SSC-1000A SpeedCharge 2/6/10 Amp Battery Charger

Schumacher Marine Battery Charger

Schumacher SSC-1000A  is a battery charger that weighs 11.5 pounds with a dimension of 3.3 x 10.8 x 7.5 inches. It has an electronic push button which gives you the option to view the display mode, charge rate and battery. One of the unique features of Schumacher SSC-1000A is that it diagnoses problems with the battery and charging system. 

Its digital meter shows the charge status and test results of the diagnosis done. Its 10-amp fast charge is able to monitor battery condition and adjust its charge rate. No need to look for a charger that can cater to small batteries.

Schumacher SSC-1000A also has a 2-amp slow charge which helps charge small batteries or maintain large ones for motorcycles, snow mobiles, and lawn tractor batteries. If you’re looking for a charger that can diagnose problems and cater to small and big batteries, then the Schumacher SSC-1000A might be just the best battery charger you need.

Things We Liked

  • Combined Digital Meter To Display Battery Status;
  • Slow & Fast Charging Mode Available;
  • Self-adjustment Feature To Prevent Battery Damage;
  • System Test Capability Allow You To Diagnose The Problems;

Things We Didn’t Like

  • Noisy & Always Active Cooling Fan;

6. NOCO Genius G750 6V/12V .75A UltraSafe Smart Battery Charger

NOCO Genius G750 Marine Battery Charger

NOCO Genius G750 is a battery charger designed for safety. With its lightweight and compact design, it is considered the most advanced charger ever. NOCO Genius G750 is one of the best boat battery chargers on the market. NOCO Genius G750 can charge lead-acid batteries reaching up to 30Ah. Its cutting-edge Technology charges 2x faster than traditional battery chargers. This cuts off the waiting time for the batteries to be fully charged.

It is also streamlined, compact and lightweight which means taking it with you will be a breeze.

G750 also easily mounts into any AC outlet. Its safety features prevent unnecessary inconveniences and instead offer a peace of mind. In need of a battery charger that can decide for itself? Then NOCO Genius G750 will let you finish your tasks as it can independently get its task intelligently done.

Things We Liked

  • Compact Design And Extremely Lightweight;
  • Spark-proof And Overcharge Protection;
  • Super Fast Charging System And Water-resistant;
  • Superb Performance;

Things We Didn’t Like

  • Imperfect Documentation;

7. NOCO Genius GENM2 8 Amp 2-Bank Smart On-Board Battery Charger

NOCO Genius GENM2 Marine Battery Charger

NOCO Genius GENM2 8 Amp 2-Bank is a 2.7-pound, 9.3 x 9.4 x 2.5-inch, streamlined, ultra-compact, portable and extraordinarily lightweight battery charger. It has holes for mounting with a base made of rubber that prevents slipping and scratching. This feature makes the charger UV and water-resistant. NOCO Genius GENM2 has a cutting edge technology which makes charging faster than other battery chargers.

It can repair damaged batteries and can charge lead-acid and lithium-ion batteries. GENM2 also maintains various types of automotive, and other batteries with its 1.1A/bank. A cousin of NOCO Genius G750, GENM2 also offers amazing safety features making it one of the best 2 bank marine battery chargers.

It has LED indicators that provide information about the problem diagnosed even in maintenance mode. In need of a battery to keep you company on water? This NOCO Genius GENM2 8 Amp 2-Bank Waterproof Smart On-Board Battery Charger will not fail.

Things We Liked

  • Fast Charging Technology That Allows You To Charge Battery 2x Faster;
  • Advanced Recovery Mode To Repair Damaged Part Of Battery;
  • Sleek Design, Spark-proof And Water Resistant;

Things We Didn’t Like

  • No noticeable cons;

8. MinnKota MK 210D On-Board Battery Charger

MinnKota MK 210D Marine Battery Charger

MinnKota MK 210D is the best onboard marine battery charger. Weighing at 11 pounds and having a dimension of 11.5 by 7.5 by 4 inches, this battery charger is also waterproof, shock- and vibration-resistant. MK 210D’s digitally controlled microprocessor design protects batteries so your length of stay in the water can be extended. Automatic features are what sets this charger apart from others. 

Its automatic multi-stage charging ensures you have a full charge every time. 

It also has an automatic temperature compensation. This feature delivers fast charging and protects from overcharging. Being tested with its reaction to saltwater and its ability to resist corrosion, you can definitely take this with you on the water.

MK 210D also offers on-board mounting which saves you the hassle of traditional portable chargers. If you’re looking for a hassle free charger that you can take on-board, then the MinnKota MK 210D On-Board Battery Charger got you covered.

Things We Liked

  • Faster Charging In High Temperature;
  • Shock And Vibration Resistant;
  • Automatic Shutdown Features Increase Battery Life;

Things We Didn’t Like

  • Little Bit Large And Heavy;

9. NOCO Genius G4 6V/12V 4.4A 4-Bank UltraSafe Smart Battery Charger

NOCO Genius G4 Marine Battery Charger

NOCO Genius G4 is one of the best marine chargers on the market. Only weighing 2.7 pounds and having a dimension of 9.3 x 9.4 x 2.5 inches this battery charger can maintain different types of automotive and other batteries with its 1.1A/Bank. These maintenance are proven safe for your batteries. Its design is streamlined, compact and incredibly lightweight.

NOCO Genius G4 also charges with double speed faster than ordinary chargers cutting your waiting time in half. Because of its technology, G4 also offers automatic minimizing of energy consumption.

This feature also offers spark-proof technology, and others such as reverse polarity and protection against overcharging. G4 likewise have LED indicators that provide feedback and information.

All of these even when in maintenance mode. NOCO Genius G4 offers all these plus mounting holes and a base made of rubber. No slipping, no scratches. G4 remains UV and water-resistant even when exposed to unfavorable conditions.

Things We Liked

  • Sleek Design, Portable, And Lightweight;
  • Excellent Performance And 2x Faster Charging;
  • Safe Charging And Overcharge Protection;
  • UV And Water Resistant;
  • Damaged Battery Repairing Feature;
  • Impressive Battery Status Indicator;

Things We Didn’t Like

  • Too Fast Power Up Time;
  • Some Charge Is Required To Begin Repairing Process;

10. Schumacher 6/12V Battery Charger and 40/250A Engine Starter

6/12V Battery Charger and 40/250A Engine Starter

The SC1325 from Schumacher doubles as a battery charger and engine starter. It is a 40/250A engine starter. As a battery charger, it charges 6V and 12V batteries. This unit is very large and heavy compared to another charger we have reviewed in this list. To move this charger around, there is a pair of wheels attached underneath. The size is almost a medium sized luggage. 

From the size, you can guess it is not something you can toss into your glove compartment and use wherever you need it. But it is quite essential for garage and workshop owners to jumpstart dead engines and batteries. For an energy boost, this charger’s boost rate is 40A and it delivers 250A to quickly start any engine.

This charger is compatible with 6/2A category batteries. A microprocessor ensures constant amperage by auto-adjusting the amperage rate throughout the charging process. The attached digital display helps to monitor the voltage, amperage and charge level of the batteries. The display also helps to configure settings manually for different batteries and engines.

Even if the battery is an expensive one, to treat car engines and high capacity marine batteries, it is quite necessary. This unit gets a negative review over purchasing from unauthenticated sources. So, be sure about the seller before you buy.

Things We Liked

  • Easy to move;
  • Auto adjustment of amperage;
  • Digital display;
  • Useful to monitor charge;
  • Helps to maintain constant amperage;

Things We Didn’t Like

  • Heavy and pricey.

Features of the Right Type Chargers

Choosing the right onboard charger is really difficult. This is why I’m highlighting some must-have features that will help you to pick one from the above list.

Type of Battery

Before buying a new charger, you must know about the type and specification of the battery you are using. Try to know about amp/ hour capacity, input voltage and other specifications. Once you’ve figured out all of these, you can easily choose the right charger.

Durability & Safety

You must check for durability and safety features in the charger. It must be waterproof and also eliminate sparkling and possibility of potential shock.

Moreover, the charger must comply with ABYC safety standards along with other safety features.

Battery Voltage

You must want a charger that can provide the right amount of voltage to your battery. Though marine batteries run with 12V batteries, sometimes you may use two 6V. In that case, you need two different chargers for them. But if you have a charger that can support both of them, you don’t need to be worried.

So while buying a marine battery charger, look for the battery which is able to charge different power like 6V and 12V. Because you may need to switch between these voltages often so if your charger has the facility of switching automatically between them you don’t need to switch manually.

Number of Banks

Each of your 12V batteries can be charged if the charger has enough banks. Generally, a 3 bank charger can charge a 24V trolling motor & 12V battery. If you are running a 36V motor, you need a 4 bank to cover the motor and cranking battery.

Recovery Type 

Recovery time means the required time your battery needs to fully recharge after draining all charge. A top quality charger will recharge your vessel in 3 to 5 hours, others can take 6 to 12 hours. It is up to you to choose which one you need. If you fish multiple times in a day, you need the faster one.

Power Source of the Charger

If you’re planning to use an on- board battery charger, make sure that you have access to the shore power unit while you’re on water overnight.

You can also use portable chargers so that you can power up them at home and carry them with you on- board overnight.

How to Charge a Battery

Charging your marine battery is quite simple and easy. You only need to follow these simple process-

  • Remove the battery from the box, switch it off and clean it.
  • After cleaning, connect the charger clips to your battery’s terminals.
  • Once both your battery and charger are connected, switch on the charger and let it charge the battery.
  • When your battery is fully charged, switch the charger off and remove the clips from battery terminals.

Read More: Best 4 Bank Marine Battery Charger – Top Picks By Experts


Is it able to jump start dead car batteries?

No, it is not designed to be a jump starter. it cannot instantly do that but can do it over time. It is mainly a battery charger so it will charge your car battery. When the battery gains enough power to start up, then you can start your car by the battery. If you want to do it instantly, use a jump starter.

Is there an ON/OFF switch?

No, there is not any ON/OFF switch. You just need to plug it to the power source and connect the charging cable to the battery. That’s all.

How long is the cable?

Generally, both charging and power cables are six to eight ft. long.

Do these types of chargers protect the batteries against accidental polarity reversal?

Yes, that’s why they are important. They check reverse polarity before starting to protect your batteries.

Can it charge the car batteries under freezing temperature to start the car?

Yes, it can.

Can it be used in VRLA batteries?

Yes, it can be & it works fine.

Is it able to regulate voltage?

Simply yes. It is a switch-mode float and smart charger as well as battery maintainer. It’ll regulate the amperage and voltage that is delivered to the batteries until the batteries are fully charged. After being charged fully it will regulate the charge of the batteries as needed as long as it is left connected to the battery.

The Bottom Line

These are the top 5 marine battery chargers out there. Choosing any one of these will definitely make you feel like you have bought something worthy of your time and money. Never again will you have to wonder about what batteries to buy. Then again, precautionary measures are advised to be able to fully take advantage of these products.

But even if you have the best charger, you need to be careful about your marine battery. Such as, don’t ever let it over or undercharged or never mix your old batteries with the new one.

If you have the best charger and practice to follow these simple tips, both will enhance the lifetime of your battery.

Read more:

About Leo Evans

Hi, I am Leo Evans, the founder of trollingpowersolutions, and your guide to solve any query regarding to electronic and power devices. I have to stay updated about different aspects of latest electronics for my living. Now I feel obliged to share my learnings and experience to others with similar interests. If you have the similar interest, then this is where you belong.

Leave a Comment