Best On Board Charger in 2022 [*Top Picks*]

Looking for the best on board charger on the market? We’ve got you covered. Check out our ratings of absolute bestsellers below and make a final decision.

1270 Reviews Scanned

  • NOCO Genius GEN5X2, 2-Bank, 10-Amp (5-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
    Bestseller #1
    NOCO Genius GEN5X2, 2-Bank, 10-Amp (5-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation (386)
      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.
  • NOCO Genius GENPRO10X2, 2-Bank, 20-Amp (10-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
    Bestseller #1
    NOCO Genius GENPRO10X2, 2-Bank, 20-Amp (10-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation (386)
      Meet the GENPRO10X2 - Similar to our GEN2, only better. It's 19% smaller and delivers 33% 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 20-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. 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 - GENPRO10X2 20-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.
  • NOCO GENIUS2D, 2-Amp Direct-Mount Onboard Charger, 12V Battery Charger, Battery Maintainer, Trickle Charger, and Battery Desulfator with Temperature Compensation
    Bestseller #1
    NOCO GENIUS2D, 2-Amp Direct-Mount Onboard Charger, 12V Battery Charger, Battery Maintainer, Trickle Charger, and Battery Desulfator with Temperature Compensation (386)
      Meet the GENIUS2D - The all-new direct-mount onboard battery charger for an under-the-hood battery charging system and year-round battery maintenance. 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 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. Beyond maintenance - It's not a trickle charger, it's an advanced battery maintainer. It monitors your battery 24/7, providing intuitive and safe maintenance charging with zero overcharge. A fully-automatic, worry-free battery charger for year-round use. Restore your battery - Automatically detects battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life. Compatible with all types of vehicles - Add a permanent onboard battery charger to any vehicle to make battery maintenance simple and easy. Plus, combine with any of the GCP Series AC Port Plugs for remote charging access.
  • ProMariner ProSport HD 20 Amp Triple Bank Waterproof Marine Battery Charger, 44021
    Bestseller #1
    ProMariner ProSport HD 20 Amp Triple Bank Waterproof Marine Battery Charger, 44021 (386)
      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
  • Minn Kota Johnson Outdoors MinnKota MK 330D On-Board Battery Charger (Black) (1823305)
    Bestseller #1
    Minn Kota Johnson Outdoors MinnKota MK 330D On-Board Battery Charger (Black) (1823305) (386)
      Automatic Temperature Compensation: Chargers sense and adjust to ambient temperature fluctuations to ensure a fast, accurate charge Digital Control: Microprocessor-based design delivers a faster, more precise charge every time 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. Gel Battery Compatible - No 3 Banks, 10 Amps per Bank Digitally Controlled Multi-stage charging and automatic temperature compensation Saltwater tested and fully corrosion-resistant Three Year Warranty
  • NOCO Genius GEN5X3, 3-Bank, 15-Amp (5-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation
    Bestseller #1
    NOCO Genius GEN5X3, 3-Bank, 15-Amp (5-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger, Battery Maintainer and Battery Desulfator with Temperature Compensation (386)
      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.
  • Guest On-Board Battery Charger 8A / 12V; 2 Bank; 120V Input, 2707A
    Bestseller #1
    Guest On-Board Battery Charger 8A / 12V; 2 Bank; 120V Input, 2707A (386)
      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
  • Renogy 12V 50A DC On-Board Input MPPT Charger for Gel, AGM, and Lithium Batteries Using Multi-Stage Charging, in RVs, Cars, Boats, Yachts, Recommended to Match with 60A ANL Fuse, w
    Bestseller #1
    Renogy 12V 50A DC On-Board Input MPPT Charger for Gel, AGM, and Lithium Batteries Using Multi-Stage Charging, in RVs, Cars, Boats, Yachts, Recommended to Match with 60A ANL Fuse, w (386)
      【Recommended to Match with 60A ANL Fuse】The Renogy ANL fuse will protect your controller, wire, and battery from overcurrent. 【3-phase MPPT Charging Technology】 With Built-in Maximum Power Point Tracking (MPPT), Renogy DC-DC On-Board Battery Charger will charge your service batteries with maximized solar power, providing 3-phase charging (Bulk, Boost and Float) to regulate the whole charging and ensure the batteries will be accurately charged at the correct voltage levels to 100%. 【Multiple Protections】 Renogy DC-DC On-Board Battery Charger has multiple intelligent protections includes battery isolation, over-voltage protection, battery temperature protection, over-current protection, overheat protection, reverse current protection, solar panel and alternator reverse polarity protection, guaranteeing charging safety and protecting you batteries. 【Light & Small, Ready to be Set Up】With only 9.6in in length, 5.7in in height, and 3.13lbs in weight, Renogy DC-DC On-Board Battery Charger is ready to be installed and adapt to any tiny narrow installation space, resolving your concern from limited room in you vehicle. 【RJ45 Communication Port Featured】 Bluetooth Monitoring Ready! Exclusively available with the BT-2 Bluetooth Module accessory and Renogy DC Home App available on the IOS and Google Play Stores, you can monitor this device remotely and simply through your phone and stay constantly updated. 【Multi-input for Battery Charging】Renogy DC-DC On-Board Battery Charger is designed to charge service batteries from a starting battery linked to an alternator or by utilizing solar panels connected directly to the unit, offering multiple charging options and ensuring your battery stay fully charged.
  • ProMariner ProSport 20 Heavy Duty On-Board Marine Battery Charger 20 Amp 2 Bank Electronics Accessories
    Bestseller #1
    ProMariner ProSport 20 Heavy Duty On-Board Marine Battery Charger 20 Amp 2 Bank Electronics Accessories (2667)
      Promariner ProSport 20 Generation 3 Heavy-Duty Recreational On-Board Marine Battery Charger has a 12 Volt, 24 Volt output with a 20 Amp capacity providing 2 Banks for maximum performance. ProSport is 100% waterproof and shockproof, weighing 40% lighter than older technology epoxy filled chargers providing cooler operation and greater reliability. ProSport Distributed-On-Demand Charging technology, taking 100% of the available charging amps and distributing them to any one or combination of all batteries as needed for faster charging while extending the life of your batteries. ProSports Energy Saver Mode will monitor and Auto Maintain batteries which would significantly reduce AC power consumption, lowering operating costs and maximize reserve power performance. ProSports Advanced technology eliminates time consuming troubleshooting by clearly indicating system and battery connections are OK or if a fault is present on a specific battery bank.
  • Minn Kota 1832300 MK 230 PC Precision On-Board Marine Battery Charger, 2 Bank x 15 Amps, Black
    Bestseller #1
    Minn Kota 1832300 MK 230 PC Precision On-Board Marine Battery Charger, 2 Bank x 15 Amps, Black (386)
      Battery Type Selection: Each charging bank can be selected to your specific battery type (AGM, gel 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 Waterproof Construction: All on-board chargers are built to be waterproof, shock-resistant and vibration-resistant
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Choosing the Right on board charger

If you have recently decided to find the best on board charger, chances are you will face several obstacles on your way. Although the choice is great and you can literally buy on board charger from anywhere in the world, this also could be the problem. You may find several fakes to every high quality on board charger on the market nowadays. We can rescue you from hours of on board charger comparison by providing a detailed analysis. No matter whether you are an experienced user or a first-time buyer, this advanced manual will help you.

How to Pick the Best on board charger: Our Buying Guide & Tips

If you try to compare on board charger reviews, you’ll notice that there are lots of controversies. Thus, the top on board charger often has more user comments with the item’s pros and cons. Keep in mind that customer reviews are also subjective and can’t be trusted 100 percent. It also happens that on board charger ratings *deceive you by placing numerous negative reviews at the beginning, and all the positive reviews get lost among them. You have to calculate all the *benefits before choosing the best rated on board charger. Here are the working tips for your ‘what should I look for in a on board charger?’ question.

  • Customer rating. Almost every store has a section for buyer’s reviews. Amazon offers not only to rate each on board charger but also to review it. Check them out;
  • on board charger brands. The manufacturer must have a reliable reputation on the market and be well-known. If you are not sure about the name, you can ask Google ‘who makes the best on board charger?’ We provide detailed brand descriptions in every review too;
  • Specifications. Your choice must be well-thought. Think about all the features *and *technical details of on board charger. If you don’t like anything about it, you will regret your decision sooner or later. Do brief research;
  • Price. Advanced on board charger buying guide *must contain the prices of the product in different stores. You may pick the one you find the most beneficial. Don’t forget that *affordable products don’t mean the best. Compare the quality and price;
  • Quality. Check out the quality of materials. You may find the product information at every store. Make sure that it meets the basic US standards and is reliable. You don’t want to throw away on board charger right after you bought it. High-quality on board charger usually comes with a warranty. Check out what developers offer you and read testimonials of on board charger owners.

How We Rate Each on board charger

There is a standard approach to how we test each on board charger. Since it is physically impossible to test all the products on the market by oneself, we trust millions of customers from the US and abroad. We gather the information available on the web from multiple stores and let sophisticated AI programs analyse each product. There are numerous criteria that must be evaluated. The most important of them are:

  • Amount of clients that bought the on board charger. We check the number of reviews before we separate positive and negative ones. It is crucial to know whether the product is on-demand or not;
  • History of the brand. If the company developer produced completely different goods before they decided to switch to the on board charger, we will be more cautious about them;
  • Certificates and other documents the company provides. We have to make sure that the product we pick is reliable and will serve you well no matter how often you will use it;
  • Beneficial features. We pay attention to every benefit you receive from on board charger. After we describe them for you it is your job to pick the one you need.

Use on board charger with advantage. We have gathered helpful recommendations and tools for you here. You can decide which product you need the most by following our simple tips.

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