Best Marine Battery Charger in 2022 (Top 15 & Buying Guide)

Sometimes it might be quite difficult to find the best marine battery charger. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this marine battery charger buying guide.

Our Favorites:

# Preview Product
1 ProMariner 44021 ProSport HD Waterproof Marine Battery Charger, 20 Amp, 3 Bank ProMariner 44021 ProSport HD Waterproof Marine Battery Charger, 20 Amp, 3 Bank
2 NOCO Genius GEN5X1, 1-Bank, 5-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation NOCO Genius GEN5X1, 1-Bank, 5-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V...
3 Schumacher SC1280 15A 6V/12V Fully Automatic Battery Charger and Maintainer for Motorcycle, Power Sport, Marine, and Automotive Batteries Schumacher SC1280 15A 6V/12V Fully Automatic Battery Charger and Maintainer for Motorcycle, Power...
4 10-Amp Car Battery Charger, 12V and 24V Smart Fully Automatic Battery Charger Maintainer Trickle Charger w/ Temperature Compensation for Car Truck Motorcycle Lawn Mower Boat Marine Lead Acid Batteries 10-Amp Car Battery Charger, 12V and 24V Smart Fully Automatic Battery Charger Maintainer Trickle...
5 NOCO Genius GEN5X2, 2-Bank, 10-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation NOCO Genius GEN5X2, 2-Bank, 10-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V...
6 Guest 2707A Guest On-Board Battery Charger 8A / 12V, 2 Bank, 120V Input Guest 2707A Guest On-Board Battery Charger 8A / 12V, 2 Bank, 120V Input
7 NOCO Genius GEN5X3, 3-Bank, 15-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation NOCO Genius GEN5X3, 3-Bank, 15-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V...
8 STANLEY BC25BS Smart 12V Battery Charger for Car/Marine Charging STANLEY BC25BS Smart 12V Battery Charger for Car/Marine Charging
9 SUHU Car Battery Charger, 12V/8A 24V/4A Smart Automatic Battery Charger Maintainer Trickle Charger for Car Truck Motorcycle Lawn Mower Boat Marine RV SUV ATV SLA Wet AGM Gel Cell Lead Acid Battery Red SUHU Car Battery Charger, 12V/8A 24V/4A Smart Automatic Battery Charger Maintainer Trickle Charger...
10 Schumacher SC1359 Fully Automatic Battery Charger, Maintainer, and Auto Desulfator with Battery Detection - 15 Amp/3 Amp, 6V/12V - For Cars, Trucks, SUVs, Marine, RVs Schumacher SC1359 Fully Automatic Battery Charger, Maintainer, and Auto Desulfator with Battery...
11 NOCO GENIUS2D, 2-Amp Direct-Mount Onboard Charger, 12V Automotive Car Battery Charger, Battery Maintainer, Trickle Charger and Battery Desulfator with Temperature Compensation NOCO GENIUS2D, 2-Amp Direct-Mount Onboard Charger, 12V Automotive Car Battery Charger, Battery...
12 NOCO Genius GENPRO10X1, 1-Bank, 10-Amp (10-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation NOCO Genius GENPRO10X1, 1-Bank, 10-Amp (10-Amp Per Bank) Automatic Waterproof Smart Marine Charger,...
13 NOCO GENIUS5, 5-Amp Automatic Smart Charger, 6V and 12V Portable Automotive Car Battery Charger, Battery Maintainer, Trickle Charger and Battery Desulfator with Temperature Compensation NOCO GENIUS5, 5-Amp Automatic Smart Charger, 6V and 12V Portable Automotive Car Battery Charger,...
14 NOCO Genius GENPRO10X3, 3-Bank, 30-Amp (10-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation NOCO Genius GENPRO10X3, 3-Bank, 30-Amp (10-Amp Per Bank) Automatic Waterproof Smart Marine Charger,...
15 AUTOGEN 2-Bank Marine Battery Charger, 10-Amp (5-Amp Per Bank) Dual Battery Trickle Charger Maintainer, 6V & 12V Onboard Battery Charger and Battery Maintainer AUTOGEN 2-Bank Marine Battery Charger, 10-Amp (5-Amp Per Bank) Dual Battery Trickle Charger...

Our Favorite Marine Battery Charger Reviews:

Bestseller No. 1
ProMariner 44021 ProSport HD Waterproof Marine Battery Charger, 20 Amp, 3 Bank
  • ProSport HD 20A Triple Bank Waterproof Marine Battery Charger (Part Number 44021) replaces the old ProMariner Gen 3 ProSport 20 plus (part number 43021)
  • ProMar Digital Technology: Microprocessor and software controlled charging technology for fast, precise charging
  • Distributed-On-Demand Technology: 100% of all available charging amps are utilized by distributing unused charging amps to any one or combination of all batteries as needed
  • Heavy Duty Tri-Surface Extruded Heat Sink Design: Upper, lower and rear facing heat sink design for optimal cooling while delivering true rated constant current charging amps during its two charge mode
  • Expanded LED Display with Completion Status Gauge: LED fuel gauge style completion status. Four color multi-stage mode LED status bar. Multi-stage Charge Mode, System Check OK, individual Battery Status and Battery Type indication
SaleBestseller No. 2
NOCO Genius GEN5X1, 1-Bank, 5-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
  • Meet the GEN5X1 - Similar to our GENM1, only better. It's 37% smaller and delivers 43% more power. It's one of the best performing onboard marine battery chargers we have ever made.
  • Multiple banks - A one-bank onboard battery charger rated a 5-amps - 5-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
  • Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
  • Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
  • Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
SaleBestseller No. 3
Schumacher SC1280 15A 6V/12V Fully Automatic Battery Charger and Maintainer for Motorcycle, Power Sport, Marine, and Automotive Batteries
  • FULLY AUTOMATIC: The Schumacher SC1280 automatically detects 6V and 12V batteries. When the battery is fully charged, the unit automatically stops charging and shifts to maintain mode.
  • MICROPROCESSOR CONTROLLED: After gathering information from the connected battery, the microprocessor adjusts voltage and charge, allowing fast charging without negatively impacting battery capacity and longevity.
  • BOOST BATTERY HEALTH: The unit features multi-stage charging and float-mode monitoring for optimum battery health and extended battery life.
  • COMPATIBLE BATTERIES: The Schumacher SC1280 will charge 6V and 12V standard, AGM, gel, and deep-cycle batteries.
  • REVERSE HOOK-UP PROTECTION: With advanced reverse hook-up protection, the charger protects against damage if the clamps are not properly connected.
SaleBestseller No. 4
10-Amp Car Battery Charger, 12V and 24V Smart Fully Automatic Battery Charger Maintainer Trickle Charger w/ Temperature Compensation for Car Truck Motorcycle Lawn Mower Boat Marine Lead Acid Batteries
  • 【10-AMP QUICK CHARGER】12V 10-Amp and 24V 5-Amp 7-stage quick battery charger, charging speed is much faster than 8-Amp or 5-Amp automatic chargers. Charge or repair all 12-volt and 24volt lead-acid automotive, marine and deep-cycle batteries including AGM, GEL, SLA, Flooded in cars, trucks, SUVs, motorcycles, lawn mowers, boats marine, etc. NEW REPLACEMENT AVAILABLE FOR ANY QUALITY ISSUE.
  • 【8 CHARGING PROTECTION】Smart control, temp compensation in hot climates and under-charging in cold climates, reverse protection, cooling system, overcurrent, fireproof material, overvoltage, short circuit. Trickle charger with multiple protection ensure the safety charging at anytime anywhere. No worries!
  • 【HIGH-EFFICIENCY PULSE REPAIR】Automatically detects battery sulfation and acid stratification, take newest pulse repair function to restore lost battery performance for stronger engine starts and extended battery life. Note: can not activate or charging totally dead batteries.
  • 【VISUALIZED CHARGING】 Large LCD display the charging and battery status; charge voltage and current, inside temperature, charge percentage, summer mode, winter mode, etc. More convenient to use.
  • 【PLUG AND PLAY】 no complicated steps, just plug and charge, stay at home and charge your batteries on your own. All-in-one battery solution as battery charger, battery maintainer, trickle charger, plus battery desulfator. The must-have tool for your garage
SaleBestseller No. 5
NOCO Genius GEN5X2, 2-Bank, 10-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
  • Meet the GEN5X2 - Similar to our GENM2, only better. It's 37% smaller and delivers 43% more power. It's one of the best performing onboard marine battery chargers we have ever made.
  • Multiple banks - A two-bank onboard battery charger rated a 10-amps - 5-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
  • Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
  • Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
  • Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
Bestseller No. 6
Guest 2707A Guest On-Board Battery Charger 8A / 12V, 2 Bank, 120V Input
  • 12V 8 amp 2 bank on-board battery charger
  • Built-in safety: reverse polarity, over-current, over-voltage, over-temperature and ignition protection. In-line fuses for maximum DC wire protection
  • 100% Waterproof (IP67) and shock resistant for all fresh and saltwater applications
  • Dedicated battery charging, sensing and control per bank
  • For all 12 volt flooded and AGM lead acid batteries. 2 year warranty
SaleBestseller No. 7
NOCO Genius GEN5X3, 3-Bank, 15-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
  • Meet the GEN5X3 - Similar to our GENM3, only better. It's 37% smaller and delivers 43% more power. It's one of the best performing onboard marine battery chargers we have ever made.
  • Multiple banks - A three-bank onboard battery charger rated a 15-amps - 5-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
  • Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
  • Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
  • Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
SaleBestseller No. 8
STANLEY BC25BS Smart 12V Battery Charger for Car/Marine Charging
  • Dependable and safe to use; In an emergency, the 75-amp engine start helps jump start your vehicle in about 90 seconds
  • Successfully maintains the battery on any AGM, GEL, or WET automotive or marine 12V battery with the push of a button
  • High-frequency smart charging technology keeps battery at an optimal charge and automatically switches from fast charge, to top-off, to trickle charge
  • Allows you to monitor and charge your battery in the quickest and safest way possible; Provides extended longevity
  • Front of battery charger features four different options; LCD screen displays battery status with understandable icons
SaleBestseller No. 9
SUHU Car Battery Charger, 12V/8A 24V/4A Smart Automatic Battery Charger Maintainer Trickle Charger for Car Truck Motorcycle Lawn Mower Boat Marine RV SUV ATV SLA Wet AGM Gel Cell Lead Acid Battery Red
  • ➤【Wide Application】 This intelligent battery charger is designed for all types 12V and 24V lead-Acid batteries that within 6-150Ah(12V), 6-100Ah(24V), including AGM, GEL, SLA, Flooded (WET), or any common automotive, deep-cycle, marine, or maintenance-free battery. Note: Lithium battery is prohibited. Compatible with all types of vehicles - charges and maintains, electric vehicles agricultural vehicles, off-road vehicles, pickup trucks, boats, yachts, motorboats, and more
  • ➤【Effective Reparation Mode】Automatic sulfa-ting and acid stratification detection, One Key to Repair, Activate Battery, Pulse repair function can help to repair your loss battery and extend battery life. Note: It can not activate a dead battery or repair a battery which is damaged seriously; it also can not repair a battery back to 100% new
  • ➤【Automatic Charging】Automatic detection of 12V or 24V battery, automatic monitoring of the entire charging process through a microprocessor-controlled program. Automatically adjust the charging current, easy to deal with a variety of harsh voltage environments. This 24V 12V car battery charger ensure the adaptive charging process, with maximum safety, and automatically stop when the battery is fully charged
  • ➤【Safety Charging】Adopt ABS flame-retardant shell, fireproof, electric shock, corrosion resistant, solid and durable, Built in circuit protection guards against reverse polarity, sparks, overcharging, over-current, open-circuits, short-circuits and overheating. Smart LCD display shows the charging status and battery status to make you more assured of charging
  • ➤【Robust Quality and Service】Automotive Battery Charger has a durable and efficient design. With well-experienced engineers and dedicated support team, we are always standing by your side and ready to help you. If you have any questions, please feel free to contact us by email. NOTE: IT CAN'T JUMP START CAR, JUST HAS BATTERY CHARGING FUNCTION
SaleBestseller No. 10
Schumacher SC1359 Fully Automatic Battery Charger, Maintainer, and Auto Desulfator with Battery Detection - 15 Amp/3 Amp, 6V/12V - For Cars, Trucks, SUVs, Marine, RVs
  • RELIABLE POWER: Delivers 15 Amp charge and 3 Amp to maintain car, truck, SUV, RV, and marine batteries; compatible with standard AGM, and deep-cycle batteries
  • SMART CHARGING: Microprocessor-controlled automatic amperage rate adjustment and multi-stage charging for added precision, safety, and battery life
  • LED DISPLAY: Includes digital display, LED light indicators, and simple button controls for ease of use
  • VOLTAGE DETECTION: Automatically detects 6V or 12V batteries
  • SAFE AND RELIABLE: Reverse hook-up protection prevents the charger from operating if the clamps are reversed
Bestseller No. 11
NOCO GENIUS2D, 2-Amp Direct-Mount Onboard Charger, 12V Automotive Car Battery Charger, Battery Maintainer, Trickle Charger and Battery Desulfator with Temperature Compensation
  • Meet the GENIUS2D - A direct-mount onboard battery charger for an under-the-hood battery charging. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
  • Do more with Genius - Designed for 12-volt sealed lead-acid automotive, marine, RV, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free batteries.
  • Direct Mount - Securely mounts nearby the battery with its rugged snap-fit mounting bracket and effortlessly installs into most materials with truss-head self-tapping screws.
  • Enjoy precision charging - An integrated digital thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
  • Charge dead batteries - Charge batteries as low as 1-volt, including flooded, gel, and AGM, as well as automotive, marine, and deep-cycle batteries.
SaleBestseller No. 12
NOCO Genius GENPRO10X1, 1-Bank, 10-Amp (10-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
  • Meet the GENPRO10X1 - Similar to our GEN1, only better. It's 41% smaller and delivers 33% more power. It's one of the best performing onboard marine battery chargers we have ever made.
  • Multiple banks - A one-bank onboard battery charger rated a 10-amps - 10-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
  • Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
  • Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
  • Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
SaleBestseller No. 13
NOCO GENIUS5, 5-Amp Automatic Smart Charger, 6V and 12V Portable Automotive Car Battery Charger, Battery Maintainer, Trickle Charger and Battery Desulfator with Temperature Compensation
  • Meet the GENIUS5 - Similar to our G3500, just better. It's 34% smaller and delivers over 65% more power. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
  • Do more with Genius - Designed for 6-volt and 12-volt sealed lead-acid automotive, marine, RV, powersport, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free, plus lithium-ion batteries (lifepo4).
  • Enjoy precision charging - An integrated digital thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
  • Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
  • Restore your battery - An advanced battery repair mode uses slow pulse reconditioner technology to detect battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
SaleBestseller No. 14
NOCO Genius GENPRO10X3, 3-Bank, 30-Amp (10-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
  • Meet the GENPRO10X3 - Similar to our GEN3, only better. It's 27% smaller and delivers 33% more power. It's one of the best performing onboard marine battery chargers we have ever made.
  • Multiple banks - A three-bank onboard battery charger rated a 30-amps - 10-amps per bank - for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
  • Charging modes - Independently charge and control each battery bank with selectable charging modes - including 12V, 12V AGM, 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries.
  • Enjoy precision charging - An integrated thermal sensor detects the ambient temperature and alters the charge to eliminate over-charging in hot climates and under-charging in cold climates.
  • Charge dead batteries - Charges batteries as low as 1-volt. Or use the all-new force mode that allows you to take control and manually begin charging dead batteries down to zero volts.
Bestseller No. 15
AUTOGEN 2-Bank Marine Battery Charger, 10-Amp (5-Amp Per Bank) Dual Battery Trickle Charger Maintainer, 6V & 12V Onboard Battery Charger and Battery Maintainer
  • 【2-Bank, 10-Amp】10 Amp (5 Amp per bank) on-board battery charger for charging and maintaining two 6V/12V batteries independently.
  • 【Widely Batteries】Safely charge and maintain all types of Lead-acid batteries, including wet, gel, AGM, and deep-cycle batteries. Marine battery charger is also a great choice for Cars, Trucks, RV, Boats, Yachts.
  • 【Automatic Voltage Detection】Auto select 6V/12V mode without keying button, it automatically determines the correct voltage for your target battery. Two bank charger output 2 x 5A depending on the condition of each battery. Constantly regulated voltage patterns allow the battery to be recharged fully and safely without fear of overcharging.
  • 【Monitor Power Levels】Solid state two-color LED light indicates the state of the charge. Continuous charging, unlimited time, automatically enter the power maintenance mode after full, extend the battery life, worry-free battery charger for daily use.
  • 【Multiple Security Protection】Multiple security protection, such as over current protection, overcharge protection, overheat protection, reverse connection protection, short circuit protection. Rugged and 100% waterproof, waterproof coefficient reach IP65.

Last update on 2022-12-06 / Affiliate links / Images from Amazon Product Advertising API

How to find the best marine battery charger?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best marine battery charger for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good marine battery charger recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

  • What features does the marine battery charger need to have to be perfect for my needs?
  • What is my budget?
  • Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for marine battery charger to find what you’re looking for:

Brand

In some cases, the brand of marine battery charger is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.

Features

The features in any given marine battery charger are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.

Reviews

Customer reviews about marine battery charger are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.

Quality

Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare marine battery charger quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.

Warranty

Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.

Conclusion

The quest to find the best marine battery charger can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.