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.

5783 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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What to Think About When Buying on board charger

When you realize you need to buy a quality on board charger, you may just go to the nearest store where they are sold. Or use your brain and search for the best-rated on board charger online. This research, though, is a thorough work. That’s why you need someone to rate each on board charger and come up with conclusions. And this is exactly what we do: choose the best item for your needs and the best store for you to buy it at.

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

First, ask yourself: what should I look for in a on board charger? If this item is exactly what you need, with its materials, features, size, price, and so on – go on and search for it. If you just want something of a kind, you better look through the available alternatives, as they always exist.

Even when you are certain about the one you want, though, the question is who makes the best on board charger offer.

So, what are the potential issues you better avoid?

  • Low quality items. They can be used, damaged, or initially flawed. on board charger brands usually withdraw batches that turn out flawed and replace them, but it’s not always the case. How do you know you get what you deserve?
  • Package bundle. Do you get the item with all the accessories it should come with? Does the seller add any extras? Or do they remove something unnecessary to make it cheaper? Awareness is necessary to make the right choice.
  • Overpriced items. Some stores may hope you are too lazy to do the job. This on board charger buying guide is here to remind you: you don’t have to pick the first option you see, you can choose.
  • Delivery issues. Not only can it take too long. Shipping may cost too much, your item may be damaged during transportation, and, finally, it can get lost at all. There can be ridiculous mistakes like wrong color or size, if it applies. Of course, you can claim a refund, but can anyone refund your hopes and expectations?

Where can you learn about it all? You can surf through online stores and aggregators, try to analyze reviews and decide whether they are trustworthy, and get tired of it. As an alternative, you can trust our algorithms and let them choose the best on board charger for you.

How We Rate Each on board charger

How we test each on board charger is not a secret. We compare on board charger reviews by both users and professional reviewers. It enables us to cover problems that pop up rarely. Doing an original on board charger review might be great, but you need to fetch hundreds and thousands of them to get the full picture.

With our AI-based tools, we fetch lots of reviews and rates to compare various on board charger offers as well as its potential alternatives. Here are the parameters we use:

  • Product quality and reliability. Of course, the longer the item is available on the market, the more relevant are the marks. It’s hard, for example, to judge the durability when you have just bought it.
  • Brand value. That’s a sort of prediction, but brands usually care about their public image.
  • Features and specifications. What do you get for your money? Will it satisfy you? Are all the necessary features here? Do you have to overpay for features you’ll hardly ever need?
  • Price. As great as it is, even the top on board charger on the market can be overpriced.
  • Alternatives. A good on board charger comparison to rivals may help you understand why you want exactly this one. Or maybe you will settle for another one that fits your needs even better.

Where do we get this information? Mostly from on board charger ratings and reviews on marketplaces and independent aggregators. Prepared and processed, it sifts the best rated on board charger offers from the rest. So, with us, you can find the on board charger of your dream easy and quick!

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