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.

1563 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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How to Buy the Best on board charger?

Is searching for a quality on board charger becoming stressful for you? Do you have annoying doubts about the available on board charger models? You’re not alone! We know about this problem very well and do the hard job of testing and researching to rate each on board charger as objectively as possible and provide you with the most detailed on board charger comparison.

How We Create Our Reviews

We do our best every day to find the top on board charger, highlight their pros and cons, and regularly update our reviews. However, it’s still very important that you invest some time in researching the best rated on board charger offers. Here are some of the most important questions to ask:

  • Who makes the best on board charger?
  • Should I buy this product, or is it useless for me?
  • In what ways can I benefit if you buy the best on board charger?
  • What product information should I consider before purchasing a on board charger?
  • What should I look for in a on board charger?
  • Which ​​on board charger brands are currently the best on the market?
  • What sources or on board charger ratings and reviews can I trust?

We know that you may have many more other questions about on board charger, so we highly recommend you compare on board charger reviews from as many sources as possible. Of course, it will take quite a lot of time and requires effort, but you can trust yourself more than anyone else. Some of the best sources of technical details and reviews include on board charger buying guides, product rating aggregating websites, testimonials from bloggers, and opinions of other consumers on various forums and social networks. Approach the research mindfully to ensure that you invest your money in the worthiest product available.

How We Rate Each on board charger

Our team provides an in-depth on board charger buying guide too. Our review standards include thorough analysis, objectivity, and authenticity. We employ AI-powered big data analytics in order to filter information and ensure the credibility of online product ratings. Our custom algorithms help us suggest top on board charger models objectively and without bias as we don’t cooperate with brands.

The software we use creates product listings based on multiple important factors, such as

  1. Manufacturer value – some on board charger manufacturers offer more value to their buyers than their competitors. Our mission is to spot these values and highlight brands that deserve more attention.
  2. Important Specifications & Features – what aspects of a on board charger deserve your strictest attention and why.
  3. on board charger model value & *benefits *– even a single manufacturer can offer similar items of different values. We can help you see how much value you can get from each item. This includes evaluating product warranty, price, and testimonials. Sometimes the affordable options are the better ones.
  4. *Customer rating – *our on board charger rating algorithm figures out product ratings objectively.
  5. Customer reviews – real customer reviews are even more important than overall ratings as they give you info about first-hand experiences and use cases.
  6. Quality of the product – some products are overpriced, but we don’t let them pass our review threshold.
  7. Reliability of the products – we test selected products in real-life scenarios to see how durable and useful they really are. We are transparent on how we test each on board charger and always reveal all the pros and cons.

Our team regularly updates all on board charger reviews in order to stay on top of any changes and new details. If you find any of the information on our website irrelevant, you are free to contact us, and we will consider fixing the issue as soon as possible. We are available 24/5. You can contact us if you have a question or a complaint.

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