Marine Battery Chargers are an important part of your boat’s electrical system. We ask a lot of our marine batteries. Boats have a different rhythm of use than cars do. But when it’s time to fire off the engine, we need to hear that growl and hum immediately. Having a high-quality marine battery charger means that the batteries will be in tip-top condition when you need them, and will charge quickly when you’re a bit low on juice.
The ideal marine battery charger for your boat will depend on the number of batteries you have, and your amperage requirements. This article reviews the 10 best marine battery chargers available. We’ll start with the best marine battery charger: the ProMariner 43012 ProSport 12 charger.
Best Marine Battery Charger
Our Top Pick: ProMariner 43012 ProSport 12 Marine Battery Charger
Key Points at a Glance
- The ProMariner has at 12 Amp charging capacity with a 12 to 24 volt output.
- It is highly reliable as its 100% waterproof and can withstand the hostile and demanding marine environment.
- The ProMariner automatically reconditions the batteries every month to increase their lifespan and performance.
- 2-bank battery charger
The ProMariner 43012 is a heavy-duty battery charger. It has 2 banks with a 12 Amp capacity and 12/24 volt output. The ProMariner has a fully digital microprocessor control chip. It provides instant feedback regarding any issues. This battery charger has an on-demand charging technology, which takes the charging amps and distributes them equally.
The ProMariner ProSport is also shock and waterproof.
This series of battery chargers work really well, even if you use off a generator. The quality just is as good as it’s portrayed.
The ProMariner ProSport automatically reconditions all the boat batteries at least once a month to ensure long life and performance. It also charges crank engine batteries, which supplies the remaining charging amps to the house battery.
The 43012 has various indicators to display the charging status of the battery. It offers multi-protection from voltage, load and temperature issues, prevents reverse polarity, and offers ignition protection. The ProMariner is a lightweight charger with an excellent finish. It delivers amazing performance even in the most demanding or hostile environments.
This marine battery charger is surprisingly cost-effective, considering its performance and durability. ProMariner’s reliability and functionality under the most hostile marine, industrial and outdoor environments make it the best marine battery charger out there.
- 2 Year Warranty
- Energy Saver Mode
- Storage Recondition Mode
- Built-in Quality and Safety
- Distributed-On-Demand Technology
Our Runner Up: Minn Kota MK-315D On-Board Battery Charger
Key Points at a Glance
- It is an onboard charger or maintainer that keeps the boat on full charge even when it’s operating.
- Comes in 5 and 10 amp versions, with 1-4 banks available
- The battery status is constantly monitored, preventing any mishaps from occurring.
- Its automatic shut off response once a battery is fully-charged is great as it helps conserve power for other times.
The Minn Kota Battery Charger is one of the most popular marine chargers in the market these days. It is a great charger that is available at an affordable price. It offers great performance and rugged reliability. These units give exactly what most boat owners expect from marine chargers.
They also offer improved protection for your boat’s batteries, which is a highly important factor to consider.
It comes in a variety of options, including two different amperage models (5 and 10-amp) and between 1-4 banks. Depending on how many batteries you need to charge, you can get the appropriate size for your needs.
This charger is digitally-controlled and has a microprocessor that helps charge the boat batteries quickly and more efficiently.
The Minn Kota is a smart charger that adjusts itself. It monitors the current charging position and adjusts itself according to that. This enables your boat to stay in the water for longer without worrying about the batteries. This charger protects its batteries through multi-stage charging and automatically shuts off once the charging is complete.
The Minn Kota battery also has a temperature compensation system to prevent any mishaps due to extreme weather conditions.
- 3 banks, 5 amps per bank
- Multi-stage charging and automatic temperature...
- Saltwater tested and fully corrosion-resistant
- Three-year warranty
- Digitally controlled microprocessor design...
Best Budget: BMK 12V 5A Smart Boat Battery Charger
Key Points at a Glance
- The BMK 12V battery offers fast-paced charging to various devices.
- It offers multi safety features such as prevention of short circuits, regulating load, polarity reverse, etc.
- It is reasonably priced yet super safe and easy to use.
The BMK 12V battery charger/maintainer comes with detachable alligator ring clips. It is a fast-paced charger and can detect a defective battery before charging. It is suitable for charging batteries with 15-100Ah. It has multi-protect features, including a 72-hour upgraded feature that is activated if the battery is overcharged. This solid charger is made of high-quality ABS and is 100% waterproof. It protects your batteries from short circuits, overload and polarity reverse and also avoids overcharge or discharge.
The BMK comes fully loaded and has passed a burn-in test. This means that it is highly reliable, efficient, and stable. The charger stops charging once the battery is full to avoid any complications.
It also features an LED indicator that is designed to reveal the current charging status. It can be used to charge the battery of different devices such as lawnmowers, boats, cars, electric vehicles, etc.
This unit is a lightweight charger that can be taken anywhere. Additionally, it can be used as a Trickle Battery Charger. The best part is the BMK 12V battery charger is affordable, easy to use, and comes with protective covers to avoid touching between the terminals.
The biggest complaint buyers have with these battery chargers concerns the LED indicators. They don’t clearly depict the charging status, as they remain stable throughout. LED indicators that blink more are easier to use, and clearly show the charging status of the battery.
- 【UPGRADED DEFECTIVE BATTERY DETECT/FAST CHARGING...
- 【UPGRADED 72-HOUR SAFETY FEATURES/MULTI SAFETY...
- 【4-STAGE SMART CHARGING - FULLY AUTOMATIC BOAT...
- 【UPGRADED WITH 10A FUSE ONTO RING CONNECTORS &...
- 【QUALIRY ENSURANCE & IN TIME SERVICE】BMK is...
Key Points at a Glance
- The Marinco Charge Pro can charge any batteries, including flooded, AGM or even Gel batteries.
- It has a microprocessor that enhances its functioning and also controls the charging to ensure accurate and efficient charging.
- It has a high charging speed, so it can charge your batteries quickly
- Available in 10 amp 2-bank model, and 6amp 1-bank model
Weighing up to 1.5 kilograms, this battery charger is a great option for your boat. It replaces Guest 2608A. It can tackle any type and staed of battery, including AGM and Gel batteries, as well as flooded batteries. The Marinco Charge Pro has an incorporated microprocessor that controls the battery charging to ensure accuracy. It has universal 120/130V input. The microprocessor allows it to function intuitively.
The Marinco comes in two configurations: a 10-amp, two-bank model, and a 6-amp, single-bank model. Depending on the number and size of batteries you’re looking to charge, you’ll need the larger or smaller model.
This battery charger also has sense-send technology. It basically senses the power needs of any battery and then routes the power to it accordingly. You can also run the terminals in parallel to the same connection. This battery charger is your best bet if you want to charge batteries really quickly.
It is also very quiet as compared to other battery chargers, doesn’t overheat, and is extremely simple to use.
- Charge flooded, AGM or Gel batteries
- Microprocessor controlled for accurate charging
- Universal input 120/230V input for go-anywhere...
- Intuitive operation
- Sense-Send technology senses the power needs of...
Key Points at a Glance
- Available in a variety of configurations and options
- It features a 30A quick boost and 100A jump start, so it is powerful enough to start vehicles with large batteries.
- It features a battery and alternator tester that keeps you informed about its current charging levels and also aids in diagnosing any electrical issues.
- Can charge different types of batteries, including standard, AGM, gel, and even deep-cycle batteries.
The Schumacher battery charger is great for jump-starting a large battery. Not only is it an automatic battery charger, but it’s also an engine starter. The Schumacher fully automatic battery charger has a battery and alternator tester that notifies you of the current charging level of the battery and also helps diagnose any electrical issues.
This battery charger is controlled by a microprocessor and also has a multi-charging system, which ensures safety and long battery life. The Schumacher charger has a Built-in reverse hook-up protection that prevents the charger from working if the clamps are reversed. It also has a start and stop button and LED indicators which improve the accuracy of the charger and make it easier to use.
This marine battery charger meets the highest industry standards with its Schu Eco-Energy. Additionally, it is also DOE compliant and is used to charge different types of batteries, such as AGM, gel, and deep-cycle batteries.
Buyer’s Tips: Marine Battery Chargers
Who Should Buy a Marine Battery Charger?
Marine battery chargers are a must for boat owners who need to ensure steady power for their boats, at any time.
Important Features to Consider
When it comes to marine battery chargers, there are many options to choose from. Here are a few important features for you to consider:
Number of Banks and Amperage
Depending on the scale of your battery array, you may need a battery charger with multiple banks. Generally, those with 2 batteries need a two-bank charger, those with 3 batteries need a three-bank charger, etc. This will ensure that all of your batteries in your array will be charged.
A good quality marine battery charger will last at least four years or even a decade. It will be able to charge the battery of the boat almost a hundred times over, but once you charge the battery using a wrong charger, the battery will be completely damaged. Therefore, the charger should be reliable as well as compatible with the marine battery.
A marine battery charger should be digital, preferably with a microprocessor-based design. The microprocessor helps protect the battery, charges faster, and also allows you to run the boat in the water for a longer time period. Digitally-controlled chargers help monitor the charging conditions and charging speed and relieve you of any worries associated with the battery life.
If a marine battery charger starts overheating, it will be powered off automatically. This is necessary because an overheated battery is at a risk of exploding. Once the battery charger has cooled down, it automatically restarts.
Protection Against Reverse Polarity
The battery should not work in reverse polarity. Make sure you purchase a digitally-controlled charger, so the LCD screen can indicate that the polarity needs to be corrected.
Excessive charging of the marine battery can damage it sooner. Good marine battery chargers will manage the battery charging time by shutting off once the battery is fully charged. This will also help ensure that the charger preserves its own battery and can be used later on.
Short Circuit Protection
If a short circuit occurs while the battery is still connected to the charger, the charger should stop working automatically to prevent any damage from taking place.
Frequently Asked Questions
Do marine batteries require a special charger?
Most marine batteries use AGM batteries. These batteries charge very quickly as compared to traditional lead acid batteries, but they also damage easily. Overcharging your marine batteries can cause a serious risk to them. Therefore, you need a charger that can effectively accommodate the current battery requirements. Marine batteries are expensive to purchase and hence, you need to be careful with them.
Can you overcharge a marine battery?
Marine batteries are pretty expensive and overcharging can cause significant damage to them. Overcharging the battery causes the acid inside to boil, which can cause your battery to crack or explode. This is why you should purchase a smart battery charger that automatically shuts off once the marine battery is completely charged.
Other Products We Looked At:
The Trickle Battery Charger is used for automobiles, motorcycles, lawnmowers, snowmobiles and even boats. It offers protection from various factors including short circuits, voltage issues, current overcharge or discharge, etc. The Trickle Battery charger is also water as well as dust resistant. It is fully-loaded and a stable performer.
It has a 4-stage automatic charging feature and is highly reliable.
This charger features a detachable ring with a 10A fuse so that you can charge your battery wherever you go. The battery naturally changes to float mode once it’s fully charged. The battery also features a LED indicator that functions intuitively.
The Trickle battery charger is not ultra-compact, which makes it super lightweight. It is super easy to carry around everywhere. A 6v 12v Trickle charger is available for car batteries. This product also offers a 12-month refund and after-sales services too.
Key Points at a Glance
- Capable of charging fully drained 6V & 12V lead acid batteries
- Offers multi-protection against various hazards such as overcharging, overheating and overload as well.
- Has a 4-stage automated charging process that monitors and manages the entire charging process and automatically shifts to float mode once the battery is completely charged to ensure effectiveness and efficiency.
This auto charging speed of this charger is 2A/8A/15A. It offers fully automated high frequency charging for all 12V lead acid batteries, including GEL, AGM and even STD. It is great because it is highly adaptable as the charging rate changes according to the requirements. However, a frozen battery that is below 3V cannot be charged.
This battery has a seven-step charging program. The first step includes desulphation. The second step is a soft start followed by Bulk Charge on the third. Then the battery goes into an Absorption state. The fifth step is Battery Test and the last step is reconditioning and floating.
This complete 7-step charging program offers optimized battery power without overcharging or undercharging. This battery charger is microprocessor-controlled and offers multi-stage charging for multiplied precision. It also offers safety features and a long battery life. It controls over voltage, overcharging, overheating, reverse polarity and even short circuits.
This battery charger has a pretty advanced LCD display. This not only displays the present charging status but also shows the charging current, battery type and even voltage of the battery. Error information is easier to identify, considering the easily understandable error icons that appear. This battery also has a special advanced winter charging mode.
It is specially designed to conduct battery charging in winters to ensure a longer battery life in addition to perfect charging.
Key Points at a Glance
- Highly adaptable. It adjusts itself according to the current battery requirements.
- It offers a variety of protection features– prevents overheating, reverse polarity, overcharging and short circuit
- Has an LCD display that shows the current charging status amongst other things. It also shows any system errors to prevent any danger.
The Ampeak Smart Battery is a little different from the rest because it has an AMP fast charger. It quickly charges all 12 volt lead-acid boat batteries. It’s a smart charger for products other than boat batteries. It can be used to charge motorcycles, power sports, lawnmowers and even children’s toys.
The Ampeak has an energy-saving design for activating batteries. It also offers an advanced reconditioning mode that helps reverse the damaging impact when batteries are left uncharged. It helps improve battery performance and makes them last longer. However, it doesn’t allow you to charge a dead or frozen battery.
The Ampeak Battery Chargers include a smart detection system. This system can easily detect the voltage and capacity of your marine battery and adjust the charging rate according to it. This is a great feature because it gives the battery exactly what it needs. The automatic charge cycle changes to float mode once your marine battery is fully charged.
The Ampeak battery charger also offers advanced and safety protection. Its LED indicator lets you know the charging status of the battery. With this battery, you don’t have to worry about overheating, over-voltage, overtime charging or reverse polarity.
Key Points at a Glance
- The Ampeak Smart Battery charger has several in-built safety features, which protects it from harsh weather conditions, overheating or overloading of the battery.
- It is 100% waterproof and shock-resistant from both salt and freshwater
- Advanced Reconditioning Mode that reverses the damaging impact when batteries are left uncharged for long periods.
The Noco Genius is a 2-bank battery charger, which is meant for two batteries in marine boats. It can maintain two 12-volt batteries at a single time. It is great for charging any type of lead-acid batteries, including wet, gel and AGM. The Noco Genius GENM2 also offers safety protection features such as spark-proof technology, reverse polarity and overcharging protection. This battery offers advanced technology coupled with rugged construction.
The Noco Genius is specially designed for very tough marine environments. It is waterproof and can survive up to a 3-meter submersion. This charger also protects the battery against short and open circuits, including thermal runaway. The Noco Genius is completely automatic and constantly monitors the battery and is great for detecting any potential battery problems beforehand. Also, it automatically shuts off when the battery is fully charged.
Key Points at a Glance
- It can maintain two 12-volt batteries at a time.
- The Noco Genius can charge any type of lead-acid batteries.
- It offers a variety of safety protection features such as protection against reverse polarity, spark-proof technology and overcharge protection.
This line of battery chargers and maintainer and comprises 8 different models, depending on your battery charging needs and configuration. These are built to withstand the rough marine environment. The Guest 2711A charge pro shown here offers 12V 10 amp battery charging for only 2 charging banks, though there are several different configurations available, with 1-4 banks.
It has built-in safety options, such as prevention from over-current, over-voltage, over-temperature and reverse polarity. It is completely waterproof and shock-resistant.
The materials incorporated in this battery charger are specifically chosen to provide its toughness and durability. The Guest 2711A charge pro-on-board battery offers dedicated battery charging, sensing, and control. This battery is also engineered to deliver precise and accurate performance, such as charging the battery according to its requirement, preventing it from over/undercharging, etc. While it can be used to charge a variety of batteries, it is best used for charging marine batteries.
This battery charger doesn’t require battery tenders. However, it can get pretty warm sometimes. It is recommended to not place it against a carpet or hard materials. You’ll need to leave space for air ventilation to keep it from getting warm. The pulse condition phase of the charging is pretty good as it prevents sulfation. Additionally, you can purchase a plug adapter that will help you plug it in without opening the entire battery compartment. Plus, you can easily install this battery. You don’t need special skills to install or rely on a professional.
Key Points at a Glance
- Offers 12V 10 amp charging for two batteries.
- This battery doesn’t require the use of any battery tenders.
- The pulse condition phase of the battery helps maintain its peak performance.
Conclusion: Best Marine Battery Chargers
The ProMariner 43012 ProSport 12 is rated as the best boat battery charger because it offers boat owners a complete package. Not only is it great and easy to use, but it is also controlled by a microprocessor and is a smart device. Additionally, it can withstand any type of hostile and wild conditions, rewarding them the position of the best marine battery chargers.
The ProMariner is followed by the Minn Kota MK-315D On-Board Battery Charger. It is one of the most popular marine battery chargers that are available at an affordable price. It is also highly reliable and offers great performance. The main issue with this charger is that it does not operate off a generator and also charges comparatively slowly.
The BMK 12V 5A Smart Battery Charger is a budget-friendly marine charger. It offers amazing and all-rounder features at an affordable price as compared to other marine battery chargers.