In this article, we will explore the Best Onboard Boat Charger that are now on the market. In addition to that, we have provided you with a detailed guide that will assist you in choosing the right product. We really hope that by looking through the reviews of the top Best Onboard Boat Charger products that we’ve provided below, you’ll be able to quickly narrow your choices and select the one that best satisfies your needs.
We have spent lots of time testing. According to our research, we think NOCO Best Onboard Boat Charger is the best overall. For more of our top picks, read on! Also, check out our buying guide for some tips on how to choose the right Best Onboard Boat Charger.
Editor's Choice
NOCO Genius GEN5X1, 1-Bank, 5-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V
Premium Pick
NOCO Genius GEN5X2, 2-Bank, 10-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V
Budget Pick
2 Bank Marine Battery Charger 5X2, 10A (5A/Bank) - 12V Waterproof Onboard Battery Charger, Battery
Top 10 Best Onboard Boat Charger
We researched and compared the top products in the Best Onboard Boat Charger category to provide you with these recommendations.
1. NOCO Genius GEN5X2, 2-Bank, 10-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V
- 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.
2. NOCO Genius GEN5X3, 3-Bank, 15-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V
- 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.
3. NOCO Genius GEN5X1, 1-Bank, 5-Amp (5-Amp Per Bank) Automatic Waterproof Smart Marine Charger, 12V
- Meet the GEN5X1 - Similar to our GENM1, 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 one-bank onboard battery charger rated a 5-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 - GEN5X1 5-amp 1-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.
4. 2 Bank Marine Battery Charger 5X2, 10A (5A/Bank) - 12V Waterproof Onboard Battery Charger, Battery
- 5X2, 2-Bank, 5A Per Bank: Marine battery charger for all types of lead-acid & lithium-ion 12V batteries, including marine, boat, starter & deep-cycle batteries. IP68 waterproof fully-sealed charging. Boat battery chargers can be charged 24/7 onboard.
- 3 Charging Modes: 12V SLA/AGM, 12V LITHIUM, 12V CALCIUM. 2 Batteries can charge at the same time. Each battery can independently select the suitable mode via press "MODE".
- Force Mode: Onboard marine battery charger charge dead batteries. When battery is lower than 1V, you can manually begin charging: Only press and hold the MODE button for 5s.
- Auto Repair Mode & Advanced Diagnostics: You don't need to operate. 12V Repair light is on, automatically start repair. Advanced Diagnostics: Over Voltage, Bad Battery, Over Temperature, Reverse Connection. Help you find problems quickly.
- 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.
- 5-Grid Power Display: 20%, 40%, 60%, 80%, 100%. Whats in the box : 1* On board battery chargers for boats ; 2* Battery clips; 2* Battery connectors; 2* Spare fuses; 4* Screws; 1* Bag, 1* Manual. 3-YEAR WARRANTY FOR CHARGER.
5. NOCO Genius GENPRO10X2, 2-Bank, 20A (10A/Bank) Smart Marine Battery Charger, 12V Waterproof Onboard
- 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.
6. Minn Kota 1822105 MK 210D On-Board Battery Charger (2 Banks, 5 amps per bank)
- 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
- 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
- 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
7. NOCO Genius GENPRO10X1, 1-Bank, 10-Amp (10-Amp Per Bank) Automatic Waterproof Smart Marine Charger,
- Meet the GENPRO10X1 - Similar to our GEN1, only better. It's 41% smaller and delivers 33% more power. It's one of the best performing onboard marine battery chargers we have ever made.
- Multiple banks - A one-bank onboard battery charger rated a 10-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 - GENPRO10X1 10-amp 1-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.
8. NOCO GENIUS2D, 2-Amp Direct-Mount Onboard Charger, 12V Automotive Car Battery Charger, Battery
- Meet the GENIUS2D - A direct-mount onboard battery charger for an under-the-hood battery charging. It's the all-in-one universal charging solution - battery charger, battery maintainer, trickle charger, float charger, plus battery desulfator.
- Do more with Genius - Designed for 12-volt sealed lead-acid automotive, marine, RV, and deep-cycle batteries, including flooded, gel, AGM, SLA, VRLA and maintenance-free batteries.
- 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 digital 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 just a battery trickle charger, it's an advanced battery charger maintainer. A fully-automatic, worry-free smart battery charger for everyday use - 24/7 - with zero overcharge.
- Restore your battery - An advanced battery repair mode uses slow pulse reconditioner technology to detect battery sulfation and acid stratification to restore lost battery performance for stronger engine starts and extended battery life.
- Compatible with all types of gas and diesel 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.
9. Guest 2707A Guest On-Board Battery Charger 8A / 12V, 2 Bank, 120V Input
- 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
10. NOCO Genius GENPRO10X3, 3-Bank, 30A (10A/Bank) Smart Marine Battery Charger, 12V Waterproof Onboard
- Meet the GENPRO10X3 - Similar to our GEN3, only better. It's 27% smaller and delivers 33% 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 30-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 - GENPRO10X3 30-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.
Peter
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