Are you trying to find on board battery charger for boats among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling on board battery charger for boats on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 13 hours of research and did 53 on board battery charger for boats tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best on board battery charger for boats you can buy today
- 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
- Part Number: 1822105
- Oem Equivalent Part Number: 702089
- Fit Type: Universal Fit
- 2 banks; 5 amps per bank
- Multi-stage charging and automatic temperature compensation
- Saltwater tested and fully corrosion-resistant
- Three-year warranty
- Digitally controlled microprocessor design protects your batteries so you can stay on the water longer
- 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.
- Redefined mounting - A simplified mounting system allows for quick and easy installations in any direction - even up-side-down - with an integrated anti-vibration backing to isolate shock, vibration, and noise.
- Designed for water - A fully-sealed and waterproof onboard battery charger with an ingress protection rating of IP68, but has survived brutal life cycle testing, including thousands of hours underwater.
- What's in the box - GEN5X2 10-amp 2-bank waterproof onboard marine battery chargers (120-240VAC) with a 72-Inch DC cables with 3/8-inch eyelets and a 72-inch Type-B AC cable, (2) self-tapping mounting screws, user guide, and 3-year warranty.
- 【Compatible Multiple Battery Types】 Compatible with a multitude of alternator types, the Renogy 12V DC to DC charger offers correct charging for AGM, Flooded, Gel, and Lithium batteries.
- 【Smart Multi-Stage Charging】 The 20A DC to DC smart charger will charge your house batteries from the starter battery by 3-stage charging (Bulk, Boost, and Float), to make sure it optimally and automatically charges to 100%.
- 【Various Protections For Ultra Safety】 The Renogy on-board battery charger with high-quality offers Over-voltage Protection, Over-temperature Protection, and Reverse Polarity Protection to ensure the operation safety. It also isolates the input and output to prevent voltage transmission errors and interfere with house battery charging.
- 【Protect Your Starter Battery】The DC-DC battery charger is capable of identifying whether the generator is started, to prevent over-discharge of the starting battery and protect the generator.
- 【Reliable Quality & Easy Installation】The compact and robust design of the dc to dc charger makes it suitable for all conditions, and also resolves your concern about the limited room in your vehicle.
- ProSport HD 8A 2 Bank Waterproof Marine Battery Charger (Part Number 44008)
- 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
- Charge-on-the-fly: After the boat's alternator has fully charged the starting battery, this technology will reroute the alternator power to the trolling motor batteries
- Battery Protection: extends battery life by protecting your battery from frequent deep discharges
- LED Indicator Lights: Inform of charge stage, maintenance mode status, error notifications and full charge
- Waterproof Construction: All on-board chargers are built to be waterproof, shock-resistant and vibration-resistant
- 3-Year Warranty: All battery chargers come with a full 3-year replacement warranty
- Supported Battery Types: 12v AGM, 12v Flooded Lead Acid
- TIME SLICE CHARGING: Three batteries can be charged sequentially, with the first battery charging for 15 minutes, then the second and third batteries charging for 15 minutes each, before cycling back to charging the first battery
- FULLY AUTOMATIC: The SC1645 is easy to operate with fully automatic charging that starts charging automatically after batteries are connected and automatically switches to maintain mode after batteries are fully charged
- THREE CHARGING BANKS: Three charging banks allow you to charge up to three batteries sequentially
- WATER RESISTANT: The unit is dust tight and water resistant to withstand low-pressure jets, making it ideal for waterside use
- SELECTABLE BATTERY TYPE: The charger allows you to choose your battery type and is compatible with lithium (LiFEPO4), standard, AGM, and deep-cycle batteries
- MOUNTABLE: Four mounting slots allow you to securely mount the charger vertically or horizontally
- 3 banks, 5 amps per bank
- Multi-stage charging and automatic temperature compensation
- Saltwater tested and fully corrosion-resistant
- Three-year warranty
- Digitally controlled microprocessor design protects your batteries so you can stay on the water longer
- STAY CHARGED: Provides a full charge to your vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage without overcharging
- EXTEND BATTERY LIFE: Compatible with all 12V and 6V lead-acid, flooded, AGM, and gel cell batteries and all 12V lithium batteries; complete 4-step charging program works the battery with overcharging or discharging
- PROTECTED: Rated IP67 weather resistant and shock and vibration resistant; with safety features including spark-proof and reverse charging protection
- INCLUDES: 12V/6V 9 AMP 3-bank battery charger, three two-in-one alligator clip and ring terminal harness combo cables, mounting hardware, a two-year manufacturer limited warranty, and lifetime customer support
- FUNCTIONAL: Three independent charging stations each provide 3 amps; the output power, voltage, and current of each channel depends on the condition of the battery it is charging
- LONG-TERM STORAGE: Battery Tender battery chargers are completely automatic and may be left connected to both AC power and to the batteries being charged for long periods of time
- STAY CHARGED: Provides a full charge to your vehicle’s battery before switching to float mode to maintain proper voltage levels for safe, long-term storage without overcharging
- EXTEND BATTERY LIFE: Compatible with all 12V and 6V lead-acid, flooded, AGM, and gel cell batteries and all 12V lithium batteries; complete 4-step charging program works the battery with overcharging or discharging
- PROTECTED: Rated IP67 weather resistant and shock and vibration resistant; with safety features including spark-proof and reverse charging protection
- INCLUDES: 12V/6V 12 AMP 4-bank battery charger, four two-in-one alligator clip and ring terminal harness combo cables, mounting hardware, a two-year manufacturer limited warranty, and lifetime customer support
- FUNCTIONAL: Four independent charging stations each provide 3 amps; the output power, voltage, and current of each channel depends on the condition of the battery it is charging
- LONG-TERM STORAGE: Battery Tender battery chargers are completely automatic and may be left connected to both AC power and to the batteries being charged for long periods of time
- AC Corded Model with 2.5' Power Cord, Amps: 5A, Volts: 12V, Number of batteries: 1 Bank, AC/DC Cable Length: 2.5', Size: 4" x 6.1" x 2.6", Weight: 1.4 Lbs, AC In: 110-120V AC, 50/60Hz, Built in Safety: Reverse Polarity, Ignition, Over-Current, Over-Voltage and Over- Temperature protection
- All Digital Charging Technology
- Weatherproof Gasketed Rugged Plastic Molded Housing
- Fully Automatic Multi-stage Digital Charging. Dedicated Battery Charging, Sensing and Control
- Push-to-test Battery Monitor LED Fuel Gauge Status
- Auto-maintain Energy Saver Mode
- Pre-wired Easy Installation and can be used for All 12V Flooded (Lead Acid) & Gel Batteries
- [ Fitment ]- The DC-DC battery charger is fit for multiple 12V AGM, Flooded, Gel, Sealed, Lithium-iron Phosphate and Lithium-ion, See YouTube for installation video.
- [ With 3-Stage Battery Charger ]- The dc dc charger with a 3-stage battery charger gets your batteries to 100%
- [ Ultra-High Security Protection ]- DC to DC charger 12v Offers Over-Voltage protection, Over-Temperature protection, and reverse polarity protection. Prevents voltage transfer errors and interference with home battery charging.
- [ Feature ]- Check the charging requirements from the battery manufacturer before charging your battery with this unit, Battery isolation and Battery Charger in one. Compact yet built tough for all conditions.
- [Warranty Service ]- If you are not completely satisfied with our product or have problems during use, you can contact us via Amazon message, we will solve your problem ， provide hassle-free return or refund, please feel free to buy.
- 【Smart Chip Design & Simple Connection】 Enerkey DC to DC charger adopts the new design of smart chip, which is easy to use and simple to connect. No complicated setup is needed, just connect the charging cable to the starter battery and the backup battery. Turn on the activation switch button to start charging.
- 【Multiple Safety Protection Features】 The DC-DC charger is equipped with a high quality smart chip to monitor the charging status. Provide anti-reverse connection protection, short circuit protection, over temperature protection and under voltage protection to ensure the safety of operation.
- 【Compatible with Multiple Battery Types】 This 20A DC to DC charger supports charging of a wide range of generator batteries and backup batteries. Provides safe and correct charging for ternary lithium batteries (NMP), lithium iron phosphate (LFP), AGM batteries GEL type batteries.
- 【Intelligent Charging & Identification】 Enerkey smart on-board battery charger will charge your house batteries from the starter battery by 3-stage charging (bulk, boost, and float), to make sure it optimally and automatically charges to 100%. This smart battery charger has a built-in identification chip. It can prevent battery damage and protect your battery by flashing different lights to inform you of charging abnormalities, whether the engine is starting, etc.
- 【Heat Dissipation Protection】 When the charger temperature is greater than 45 degrees Celsius, the fan turns on, and when the temperature is less than 35 degrees Celsius, the fan turns off. Automatic over-temperature protection when the temperature is greater than 100 degrees Celsius, and automatic over-temperature recovery when the temperature is less than 85 degrees Celsius. If you have any questions about the product, please feel free to contact us.
- Battery Type Selection: Each charging bank can be selected to your specific battery type (Lithium (LiFePO4) AGM or flooded lead acid) to guarantee a safe, protected charge
- Automatic Temperature Compensation: Precision chargers sense and adjust to ambient temperature fluctuations to ensure a fast, accurate charge
- Low-Line Voltage Compensation: When outlets don't put out the 120 volts they are supposed to, Precision Chargers compensate to deliver a fast, consistent charge no matter what
- Battery Equalization: Cleans and protect your battery (flooded lead acid only) every time you plug in. Also activates a more rigorous, complete cleaning at the push of a button
- Digital Control: Microprocessor-based design delivers a faster, more precise charge every time. Precision chargers can even wake dead 12 volt lithium (LiFePO4) batteries from standby automatically.
- LED Indicator Lights: Inform of charge stage, maintenance mode status, error notifications and full charge
- Automatic Multi-Stage Charging: Controls the voltage and current your battery gets throughout the charging cycle, ensuring a fast, safe and precise charge
- Waterproof Construction: All on-board chargers are built to be waterproof, shock-resistant and vibration-resistant
- 3-Year Warranty: All battery chargers come with a full 3-year replacement warranty
- Supported Battery Types: 12v AGM, 12v Flooded Lead Acid, 12v Lithium LiFePO4
- Amazon Prime Video (Video on Demand)
- --- (Director) - OMEGA MEDIA GROUP INC (Producer)
- English (Playback Language)
- English (Subtitle)
- Converts a 12V input voltage (will operate with any input voltage from 8V to 24V) to 3V DC (+10% -0%) output at up to 3A
- Up to 9W output power (3V at 3A)
- Fully sealed and waterproof
- Overload / over-current / over / low voltage protection, stable performance
- The inputs and outputs are labeled on the sticker on top of the converter, the red and black wires are the + and - 12V input, and the red and yellow wires are the + and - 3V output.
- 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.
- Redefined mounting - A simplified mounting system allows for quick and easy installations in any direction - even up-side-down - with an integrated anti-vibration backing to isolate shock, vibration, and noise.
- Designed for water - A fully-sealed and waterproof onboard battery charger with an ingress protection rating of IP68, but has survived brutal life cycle testing, including thousands of hours underwater.
- What's in the box - GEN5X3 15-amp 3-bank waterproof onboard marine battery chargers (120-240VAC) with a 72-Inch DC cables with 3/8-inch eyelets and a 72-inch Type-B AC cable, (2) self-tapping mounting screws, user guide, and 3-year warranty.
- 12V DC 1.5A charging and maintaining. 120V AC North American plug. Charge and maintain 12 Volt lead acid (sealed or vented) batteries up to 150 AMP hours
- Portable or mountable. Includes alligator clips and ring terminals for versatility and flexibility when charging different vehicles. Use the ring terminals for a permanent secure installation and the alligator clips for a quick portable charge.
- Weatherproof and water resistant to IP 65. Ideal for charging and maintaining vehicles and equipment like tractors, lawn mowers, ATVs, snow mobiles, PWC, project cars, boats, motorcycles, and more.
- Built-in safety with reverse polarity, short circuit, temperature and ignition protection. Pre-wired with fuses for easy and safe installation.
- Quickly identify charging status with expanded LED display. Indication for power, charging and auto maintain status
- BOOST BATTERY HEALTH: The unit maintains a full charge to keep the battery in top condition and make sure it’s ready when you are
- ADVANCED CHARGING ALGORITHM: Multi-stage charging employs an advanced algorithm to maximize battery charge, health, and lifespan
- FLOAT-MODE MONITORING: While in float mode, a battery charger and maintainer delivers a small current when necessary to keep the battery fully charged
- MAINTAIN STORED BATTERIES: Keep stored or infrequently used batteries fully charged and in top condition with a Schumacher battery maintainer
- WORKS WITH MANY BATTERY TYPES: The Schumacher SC1587 is compatible with 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
- MOUNT IN ENGINE COMPARTMENT: The charger can be mounted alongside your vehicle’s battery with a Schumacher mounting bracket (sold separately)
- IN THE BOX: Schumacher SC1587 1.5A 6V/12V On-Board Battery Charger and Maintainer and user manual
- 【𝟐-𝐁𝐚𝐧𝐤, 𝟏𝟎-𝐀𝐦𝐩】10 Amp (5 Amp per bank) 2 bank battery charger for charging and maintaining two 6V/12V batteries independently.
- 【𝐖𝐢𝐝𝐞𝐥𝐲 𝐁𝐚𝐭𝐭𝐞𝐫𝐢𝐞𝐬】2 bank battery charger maintainer 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】Marine battery charger 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】2 bank marine battery charger 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.
How to choose a good on board battery charger for boats
Does the idea of finding a fantastic on board battery charger for boats make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in on board battery charger for boats. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top on board battery charger for boats products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top on board battery charger for boats on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top on board battery charger for boats brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top on board battery charger for boats based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the on board battery charger for boats were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good on board battery charger for boats, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your on board battery charger for boats.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting on board battery charger for boats for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our on board battery charger for boats. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what on board battery charger for boats should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on on board battery charger for boats.
