Do you own a boat?
If you do, then you know that having a good marine battery charger is essential. A battery charger keeps your batteries charged and ready to use when you need them. In order to make the best decision possible, it is important to understand the different features and benefits of each charger.
That’s why we created this blog post – to help you understand the different features and benefits of each marine battery charger on the market. We will review the top five chargers and help you decide which one is right for you.
Read our comprehensive review of the top five marine battery chargers!
How we choose the Best Marine Battery Charger
It can be tough to find the best marine battery charger, especially if you're not sure what to look for.
There are a lot of different factors to consider when choosing a marine battery charger, from the type of battery you have to the wattage of the charger.
We've done all the hard work for you and chosen the 5 best marine battery chargers on the market. So whether you have a deep-cycle battery or a standard lead-acid battery, we've got you covered.
1. Minn Kota Digital On-Board Battery Chargers
Why We Choose The Minn Kota Battery Charger
Looking for a battery charger that is specifically designed to extend the life of your batteries? Look no further than Minn Kota.
These digital onboard battery chargers are engineered to deliver the perfect amount of charging power every time you plug in, so you can avoid over- or under-charging your batteries and prolong their overall lifespan.
Minn Kota chargers are also built with more power, innovation, and reliability than you thought possible. They feature digital controls for a smart, fast charge each time you hook up, and they are compatible with 12-, 24-, 36- or 48-volt systems with 12V/6 cell batteries.
So you can get back on the water faster and stay out there longer. Count on Minn Kota for all your battery charging needs.
What You Should Know
- Automatic temperature compensation
- Automatic multi-stage charging
- Digital control
- LED status display
- Input Voltage: 240 Volts
- Fit Type: Universal Fit
- 2 banks; 5 amps per bank
- Saltwater tested and fully corrosion-resistant
- Digitally controlled microprocessor design protects your batteries so you can stay on the water longer.
- Three-year warranty
Technical details
- Brand: Minn Kota
- Color: Black
- Item Dimensions LxWxH: 7.48 x 11.5 x 3.98 inches
- Item Weight: 11.02 Pounds
- Input Voltage: 240 Volts
2. Blue Sea Systems Automatic Charging Relays (ACRs)
Why We Choose The Blue Sea Systems Automatic Charging Relays
Looking for a reliable and easy-to-use charging relay for your boat? Look no further than the Blue Sea Systems Automatic Charging Relay (ACR)!
This top-of-the-line product is specially designed to automatically combine batteries during charging, isolate batteries when discharging, and protect sensitive electronics from engine cranking.
Hermetically sealed contacts and vapor-proof construction make the ACR ideal for use in harsh marine environments, while the dual sensing feature ensures precise and reliable operation.
And because safety is always a priority, the ACR is ignition protected so it can be safely installed aboard gasoline-powered boats.
Make your life on the water easier and more enjoyable with the Blue Sea Systems Automatic Charging Relay!
What You Should Know
- Start Isolation allows temporary isolation of House loads from the Engine circuit during engine cranking to protect sensitive electronics from sags and spikes
- Automatically combines batteries during charging, isolates batteries when discharging and when starting engines
- Hermetically sealed contacts/vapor-proof
- Ignition protected—safe for installation aboard gasoline-powered boats
- Dual sensing
- 12/24 volt auto ranging voltage input
- Supports high-output alternators up to 120 Amperes
- Warranty Description LIMITED WARRANTY
Technical details
- Brand Name: Blue Sea
- Item Dimensions LxWxH: 4 x 6 x 9 inches
- Item Weight: 1.25 Pounds
- Systems Warranty: Limited Warranty
3. NOCO Genius Smart Marine Charger
Why We Choose The NOCO Smart Marine Charge
If you're in the market for a top-of-the-line, fully-automatic onboard battery charger, look no further than the NOCO Genius GEN5X2.
This powerful charger is perfect for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries.
With its selectable charging modes - including 12V, 12V AGM, 12V Lithium batteries, and 12V Repair Mode - the GEN5X2 can handle any type of lead-acid or lithium-ion battery.
Plus, its integrated thermal sensor alters the charge to eliminate over-charging in hot climates and under-charging in cold climates. And if that weren't enough, the GEN5X2 can also charge batteries as low as 1 volt!
Plus, it's fully sealed and waterproof for added protection. So if you're looking for the best of the best when it comes to onboard battery chargers, go with the NOCO Genius GEN5X2 - you won't be disappointed!
What You Should Know
- The most powerful, compact 2-bank onboard battery charger
- Independently charge and control each battery bank
- Rated at 10-amps - 5-amps per bank
- Selectable charging modes including 12V AGM, 12V Lithium, and 12V Repair Mode
- A thermal sensor protects your battery while charging
- Charges batteries as low as 1 volt
- Fully sealed and waterproof with an IP68 ingress protection rating
- Quick and easy installations with integrated anti-vibration backing
- In the box - GEN5X2 10-amp 2-bank waterproof onboard marine battery chargers (120-240VAC); 72-Inch DC cable; 3/8-inch eyelets; 72-inch Type-B AC cable; self-tapping mounting screws; User guide; 3-year warranty.
Technical details
- Brand: NOCO
- Color: Black
- Item Dimensions LxWxH: 9.15 x 7.2 x 5.39 inches
- Item Weight: 5.26 Pounds
- Input Voltage: 120 Volts
- Current Rating: 10 Amps
4. ProMariner HD Waterproof Marine Battery Charger
Why We Choose The ProMariner Battery Charger
ProMariner is the industry leader in marine and mobile battery charging. Their products are designed to prolong the life of your batteries, and keep you on the water longer!
The ProMariner 44021 is a microprocessor and software-controlled charger that uses fast, precise charging technology.
100% of all available charging amps are utilized by distributing unused charging amps to any one or combination of all batteries as needed.
Up to 40% lighter compared to an epoxy-filled charger, the ProMariner 44021 is also able to monitor and auto-maintain batteries only when needed to maintain a full state of charge.
Dual inline waterproof fuses, reverse polarity, over-temperature, over-current, over-voltage, and ignition protection make this one of the most reliable chargers on the market today.
What You Should Know
- ProSport HD 20A Triple Bank Waterproof Marine Battery Charger (Part Number 44021) replaces the old ProMariner Gen 3 ProSport 20 plus (part number 43021)
- Uses microprocessor and software-controlled charging technology
- Up to 40% lighter
- Monitor and auto-maintain batteries
- 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
Technical details
- Brand: ProMariner
- Color: Unspecified
- Item Dimensions LxWxH: 16.4 x 8.7 x 6.3 inches
- Input Voltage: 240 Volts
5. Schumacher SC1280 Automatic Battery Charger
Why We Choose The Schumacher SC1280 Battery Charger
Keep your batteries in top condition with the Schumacher SC1280 Battery Charger.
This charger automatically detects 6V and 12V batteries and is programmed to automatically control the rapid charge and maintain functions.
With its reverse hook-up protection, the SC1280 prevents battery damage with reverse hook-up protection, which stops the charger from operating if the clamps are reversed.
The digital display and LED indicators make it easy to check a connected battery’s voltage, charging status, and percent of charge.
Keep your batteries charged and in top condition with the Schumacher SC1280 Battery Charger.
What You Should Know
- Automatically detects 6V and 12V batteries
- Charges at 15A in rapid charge mode, 3A in maintain mode
- The microprocessor adjusts voltage and charge for optimum battery health
- Multi-stage charging and float-mode monitoring for extended battery life
- Charges standard, AGM, gel, and deep-cycle batteries
- A digital display allows you to keep track of your charging progress
- Reverse hook-up protection
Technical details
- Brand: Schumacher
- Item Weight: 3.01 pounds
- Product Dimensions: 9.96 x 4.29 x 10.03 inches
FAQ: Best Marine Battery Charger
It can be tough to know which Marine Battery Charger is the best for your needs.
There are a lot of different Marine Battery Chargers on the market, and it can be tough to know which one is right for you.
We put together a list of the most frequently asked questions about Marine Battery Chargers to help you decide which one is right for you.
Do marine batteries need a special charger?
Yes, marine batteries need a special charger.
Most car batteries are designed to charge at a rate of 14.5 volts. Marine batteries, on the other hand, are designed to charge at a rate of 13.6 volts. If you try to charge a marine battery with a regular automotive battery charger, you'll damage the battery.
That's why it's important to use a marine battery charger when charging marine batteries. A good quality marine battery charger will provide the correct voltage for charging your battery and will help to extend the life of your battery.
How do I know what type of charger to buy?
Before buying a boat battery charger, you should consider the type of battery you have and the wattage of the charger.
For example, if you have a deep-cycle battery, you need a charger that has a low-amp output. If you have a standard lead-acid battery, you can use any type of battery charger. And finally, if you have a lithium-ion (Li-ion) battery, you need to use a charger that is specifically designed for Li-ion batteries.
The wattage of the charger also matters. If your battery is 12 volts and the charger is 24 volts, it won't work properly because the voltage will be too high. So make sure to choose a charger that has the same voltage as your battery.
Finally, you should also consider the size of the charger. If you have a small boat, you might not need a very large charger. But if you have a larger boat, you'll need a charger that can handle more amps.
Deep-cycle batteries: You'll need a low-amp output charger.
Standard lead-acid batteries: You can use any type of charger.
Lithium-ion (Li-ion) batteries: You need a charger that is specifically designed for Li-ion batteries.
The wattage of the charger should match the voltage of your battery.
Choose a charger size based on the amps you need to charge your battery.
What size marine battery charger do I need?
The size of the marine battery charger you need depends on a variety of factors, including the size and type of battery, the voltage of your boat's electrical system, and how often you plan to use your battery charger.
Most marine battery chargers come in 12-volt, 24-volt, and 36-volt models, so you'll need to choose the right voltage for your boat. You'll also need to decide how often you plan to use your battery charger. If you only need to charge your battery occasionally, a small model will do the job. But if you frequently use your boat or need a larger battery charger to handle multiple batteries, be sure to choose a model that can handle the load.
What setting do I put my battery charger on for a marine battery?
When charging a marine battery, it's important to set the charger on the right setting. The wrong setting can damage the battery and shorten its life.
The most common type of charger for marine batteries is called a "two-stage charger." This type of charger has two settings: "bulk" and "float." The bulk setting should be used to charge the battery when it's first plugged in. The float setting should be used once the battery is fully charged, in order to maintain its charge.
If you're not sure which setting to use, consult your battery's owner's manual or contact the manufacturer.
What is the best way to charge a deep cycle marine battery?
The best way to charge a deep cycle marine battery is to use a smart charger.
A smart charger monitors the battery's state of charge and automatically adjusts the charging current and voltage to ensure that the battery is fully charged without being overcharged. Overcharging can damage a battery, so it's important to use a smart charger to avoid this problem.
Is there a difference between deep cycle and marine battery?
There is a big difference between deep cycle and marine batteries. Deep cycle batteries are designed to be discharged and then recharged multiple times. Marine batteries, on the other hand, are built for only one discharge/recharge cycle before they are considered a dead battery.
The main difference between the two types of batteries is the way that they handle cycling. A deep cycle battery will suffer less wear and tear when it is discharged and then recharged multiple times, while a marine battery will not last as long if it is cycled frequently.
Can I charge my boat battery without disconnecting it?
Yes. It is possible to charge a boat battery without disconnecting it, but you will need to use a special charger that is designed for this purpose.
The main advantage of using a charger that can charge a battery while it is still connected is that it will help to prevent the battery from being damaged. This is because the charger will monitor the voltage and current levels and will adjust them as necessary in order to keep them within safe limits.
If you are not using a charger that can charge a battery while it is still connected, then you should disconnect the battery after each use in order to avoid any damage.
Can a dead marine battery be recharged?
It's possible to revive a dead marine battery with a charger, but it depends on the condition of the battery.
Marine batteries are designed to withstand deep discharge and thus can be more forgiving than automotive or truck batteries when it comes to recharging. If the battery is deeply discharged, it may take several charging cycles before it regains its full capacity.
If you have a severely damaged battery, it may not be worth trying to revive it. The best option, in that case, is to replace the battery with a new one.
Do you need a deep cycle battery charger for a deep cycle battery?
It depends on the battery charger. Most battery chargers are designed to work with a range of voltages, so as long as your deep cycle battery is in that voltage range, your battery charger will work fine. However, if you have a very specialized or high-powered battery charger meant for use with deep cycle batteries, you may need a deep cycle battery charger specifically designed to charge deep cycle batteries.
In general, it's a good idea to use a battery charger specifically designed for your type of battery. This is because different types of batteries require different charging voltages and currents in order to be properly charged. Using the wrong type of charger can damage your battery and shorten its lifespan.
What are AGM batteries?
AGM batteries are a type of lead-acid battery. They are named for their Absorbed Glass Mat separators. These mats are soaked in sulfuric acid and help to keep the electrolyte in suspension, meaning that they can be used in any position without spilling (including upside down).
AGM batteries have a higher battery voltage than standard lead-acid batteries (2V as opposed to 1.5V) and so can provide more power for a given size and weight. This also makes them a good choice for use in electric vehicles. AGM batteries typically last longer than standard lead-acid batteries and are less likely to leak acid if damaged.
What Is The Best Marine Battery Charger For You?
So, what's the best marine battery charger for you? It depends on your needs and what type of boating you do. We hope this review, The best marine battery charger: a comprehensive review of the top 5, gave you better clarity on what type of charger is best for your needs.
If you're still not sure which one to buy, don't worry! We've got a handy little button below each product photo that will take you right to Amazon where you can compare prices and read more reviews.
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