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NOCO Genius GEN2, 2-Bank, 20-Amp (10-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger and Battery Maintainer

4.5 4.5 out of 5 stars 660 ratings

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Brand NOCO
Color Black
Product Dimensions 9.37"D x 11.02"W x 6.3"H
Item Weight 9.06 Pounds
Output Voltage 14.4 Volts

About this item

  • A 20 amp (10 amp per bank) on-board battery charger for charging and maintaining two 12-volt batteries independently.
  • Safely charge all types of lead-acid batteries from 25-230Ah, including wet, gel, AGM, and deep-cycle batteries.
  • Advanced safety protection featuring spark-proof technology, plus reverse polarity, thermal, ignition, and overcharge protection.
  • Rugged and waterproof construction capable of submersion down to 3-meters and rated IP68 and NEMA 6P.
  • One of the most advanced battery chargers in its class, which is certified to UL1236, ISO 8846, 33 CFR 183. 410, plus backed by a 5-year.
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NOCO Genius GEN2, 2-Bank, 20-Amp (10-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger and Battery Maintainer
NOCO Genius GEN2, 2-Bank, 20-Amp (10-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger and Battery Maintainer
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PriceCurrently unavailable.$229.99$110.99-35% $37.52
List:$57.99
$169.85-20% $99.95
List:$124.95
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to install
4.7
4.8
4.3
Tech Support
4.1
4.5
3.9
Sold By
Amazon.com
Amazon.com
Amazon.com
Amazon.com
Amazon.com
input voltage
240 volts
120 volts
24 volts
12 volts
12 volts
120 volts
specification met
Cec Certified
cec certified
UL, CEC, FCC
weight
9.06 pounds
7.2 pounds
1 pounds
1 pounds
6.6 pounds
3.99 pounds

From the manufacturer

battery charger, marine battery charger, boat battery charger, onboard battery charger, marine, boat

Features built into every NOCO Genius On-Board Charger

Water protection, waterproof, water resistant

Ultrasafe, surge protection, battery charger, never spark

Multi-level, safety barrier, prevents unsafe, abnormal, conditions.

Stabilizes, internal, battery chemistry, increased performance, longevity

IP68 Waterproof

100% completely sealed, protects against extreme working environments & rated at IP68.

Safe

Protects against reverse polarity, sparks, overcharging, overcurrent, open-circuits, short-circuits and overheating.

Firewall

Multi-level safety barrier prevents unsafe and abnormal conditions.

Optimization

Stabilizes internal battery chemistry for increased performance and longevity.

Charges, two times faster, traditional, battery chargers

Applies a high-voltage pulse charge when low-voltage, sulfation or lost capacity is detected

Alters the charging process based on organic battery feedback.

Non-igniting and temperature controlled for safe and worry-free operation.

Fast

Charges two times faster than traditional battery chargers.

Recovery

Applies a high-voltage pulse charge when low-voltage, sulfation or lost capacity is detected.

Interactive

Alters the charging process based on organic battery feedback.

Ignition Protected

Non-igniting and temperature controlled for safe and worry-free operation.

Features built into every NOCO Genius On-Board Charger
marine battery charger, onboard battery charger, onboard battery charger 1 bank marine battery charger, onboard battery charger, onboard battery charger 2 bank marine battery charger, onboard battery charger, onboard battery charger 1 bank marine battery charger, onboard battery charger, onboard battery charger 2 bank marine battery charger, onboard battery charger, onboard battery charger 3 bank marine battery charger, onboard battery charger, onboard battery charger 4 bank
Customer Reviews
4.6 out of 5 stars
483
4.6 out of 5 stars
1,456
4.6 out of 5 stars
363
4.5 out of 5 stars
660
4.4 out of 5 stars
463
4.4 out of 5 stars
326
Model GENM1 GENM2 GEN1 GEN2 GEN3 GEN4
Banks 1 2 1 2 3 4
Amps Per Bank 4A 4A 10A 10A 10A 10A
Voltage 12V 12V 12V 12V 12V 12V
Total Amp Output 4A 8A 10A 20A 30A 40A
IP68 Waterproof

Product Description

The GEN2 On-Board Battery Charger offers the perfect mix of high-technology and rugged construction. With a fully-sealed, waterproof housing, the GEN2 can be easily installed and mounted directly onto a variety of applications and specifically designed for tough marine environments. Its waterproof design is capable of withstanding submersion down to 3-meters for extended periods of time without failure, and rated IP68 and NEMA 6P, providing continuous operation in the most extreme environments. The GEN Series On-Board Battery Chargers are some of the most advanced charging technology in its class. Utilizing the latest topology and power design, it is one of the most compact and lightweight battery chargers. Its onboard processor is capable of detecting, diagnosing, recovering, charging and maintaining all types of lead-acid batteries. Safely charge Wet Cell (Flooded), Gel Cell, AGM and Deep-Cycle batteries with zero overcharge. Plus, it protects against reverse polarity, sparks, short circuits, open circuits, and thermal runaway. And the GEN Series On-Board Battery Chargers are completely automatic. It continuously monitors the battery - while detecting any potential battery problems - shutting off power when the battery is fully charged, but observing the battery for optimal battery maintenance. Not only do the GEN Series On-Board Battery Chargers have advanced safety features, but have also been tested and certified by multiple third-party laboratories, including Underwriters Laboratories UL1236, ISO 8846 Marine Standards, and Ignition Protection US Coast guard 33 CFR 183. 410. And all of this is backed by our 5-Year Limited warranty. Other commonly used search terms: 2 bank marine battery charger, 3 bank marine battery charger, 4 bank marine battery charger, battery charger for boat, boat battery charger, boat battery charger 2 bank, marine battery charger, marine battery charger 2 bank, noco boat battery charger, noco gen battery charger, noco onboard charger, on-board battery charger, onboard battery charger, onboard battery charger for boats, onboard marine battery charger, rv battery charger, waterproof battery charger, waterproof boat battery charger, waterproof marine battery charger, waterproof marine battery charger.

Product information

Technical Details

Additional Information

Warranty & Support

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NOCO Genius GEN2, 2-Bank, 20-Amp (10-Amp Per Bank) Fully-Automatic Smart Marine Charger, 12V Onboard Battery Charger and Battery Maintainer


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What's in the box

  • GEN2 On-Board Battery Charger
  • Looking for specific info?

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    660 global ratings

    Customers say

    Customers like the quality, appearance, ease of installation, charging and value of the battery charger. For example, they mention it works great at keeping their batteries charged, it's well built and easy to mount. They appreciate the quick charging speed and the fact that it automatically charges and goes into maintenance mode. That said, they say it'll recharge overnight and is good value for money.

    AI-generated from the text of customer reviews

    139 customers mention111 positive28 negative

    Customers like the quality of the battery charger. They say it works great at keeping their batteries charged and is easy to hook up. Some customers also say that it solves their battery problems and keeps the batteries charged up properly. Overall, customers are satisfied with the quality and performance of the product.

    "...the feature that cleans the plates in the batteries, which helps the battery life a lot and extends their peak performance...." Read more

    "...with my voltmeter for the first few weeks and it has continued to perform flawlessly. This may be the best on board charger I have ever owned...." Read more

    "...It keeps the batteries charged up properly and I never have a problem with the lift as I used to. Works well!..." Read more

    "...Just plug it in and it works. Bravo NOCO, finally a company that gets simplicity and durability." Read more

    69 customers mention59 positive10 negative

    Customers like the appearance of the battery charger. They say it's well built, has top notch technology, and is a great piece of equipment. Some customers also mention that the LEDs turn green and the chassis batteries have been solid ever sense.

    "...The quality is fantastic, fully sealed for marine environments and size is smaller than most other units of equal amps...." Read more

    "...considering investing in another DualPro - but they are high quality units and carry a price premium that reflects that quality and brand name..." Read more

    "...Nothing comes close to this. Great piece of gear, totally waterproof, silent, and easy to install. Just plug it in and it works...." Read more

    "...Durable connections and strong case, very glad I went with this unit and plan to upgrade my 10a single bank to another 20a dual bank when I add..." Read more

    57 customers mention57 positive0 negative

    Customers find the installation of the battery charger to be easy. They mention it's easy to mount, connect, and use. Some say that retrofitting their scissor lift was easy with this replacement battery charger. They also say that the truck starts effortlessly and that the tech support was great when they had questions about the product.

    "...The guys at NOCO built a product that is as simple to install as hooking up a few wires and plug it in and it does the rest...." Read more

    "Retrofitting my scissor lift was easy with this replacement battery charger which took about 1/5th the space the original on board charger did...." Read more

    "...Considering the installation spot, installation wasn't too bad...." Read more

    "...Great piece of gear, totally waterproof, silent, and easy to install. Just plug it in and it works...." Read more

    41 customers mention33 positive8 negative

    Customers like the charging of the battery charger. They mention that it charges their batteries quickly, even in bright sunlight. It automatically charges and goes into maintenance mode. Some say that it fully charges with battery conditioning in mind. Overall, most are satisfied with the charging capabilities of the product.

    "...has a programmed chip inside to calculate, control, and vary the charging cycle amperage to accommodate the state of each individual battery...." Read more

    "...The Genius has multistage charging typically found in much more expensive units...." Read more

    "...2 banks @ 10amps per bank. It automatically charges and then shuts off and goes into a "mainatain" mode...." Read more

    "It is fast and a very solid unit. It is much heavier duty than I thought it would be...." Read more

    31 customers mention23 positive8 negative

    Customers like the value of the battery charger. They mention it's the best charger bang for your buck, works great, and is a good investment. Some say it'll give you great power output for the money.

    "...It's worth every penny! The features can't be ignored." Read more

    "...The charger is small and light and give great power output for the money. 2 banks @ 10amps per bank...." Read more

    "...to say, the batteries are shot, the charger is going overboard, money lost, lesson learned. Never Ever buy a Noco Charger again!!!!" Read more

    "...This was worth every penny....." Read more

    12 customers mention4 positive8 negative

    Customers are mixed about the brightness of the battery charger. Some mention that the two green LEDs are quite bright and cool, while others say that the lights on unit were flashing in an irregular fashion. Some customers also report that the indicator lights are difficult to see in daylight.

    "...THe charger kicks in when shore power is attached. The red light remained lit overnight and you could hear the fluid bubbling...." Read more

    "...epoxy, weather proof, temperature proof, and has two green leds, quite bright, that come on when the batteries are at 100% capacity...." Read more

    "...The replacement one stopped working the other day, no lights, just dead. Tried to get warranty replacement as stated under 5 year warranty...." Read more

    "...The bank 2 LED would stay red while bank 1 turned green in 10 minutes...." Read more

    10 customers mention6 positive4 negative

    Customers are mixed about the compactness of the battery charger. Some mention that it fits into small spaces and gives great power output for the money, while others say that the leads are a little short.

    "...quality is fantastic, fully sealed for marine environments and size is smaller than most other units of equal amps. I can only say thanks to NOCO...." Read more

    "...The only dilemma was that the leads are a little short for what I needed to do. The installation instructions say to not alter the charger...." Read more

    "...The charger is small and light and give great power output for the money. 2 banks @ 10amps per bank...." Read more

    "...I do agree with some of the reviews is that the power cord is a little short, but really no problem or issue for my application...." Read more

    13 customers mention0 positive13 negative

    Customers are dissatisfied with the performance of the battery charger. They mention that it stopped working, one of the leads stopped working and that it didn't even last a year.

    "Jury is still out, 1 year and 2 days after I purchased this, it decided not to work in the middle of Lake Powell...." Read more

    "...No need. The next time I plugged it in it didn't work at all...." Read more

    "...The replacement one stopped working the other day, no lights, just dead. Tried to get warranty replacement as stated under 5 year warranty...." Read more

    "I have had two of these, on the first one, one of the leads stopped working...." Read more

    Five Stars
    5 Stars
    Five Stars
    Awesome charger.I have 2 of them on my boat, a 2 bank 20amp charging my Optima Bluetop D31 engine batteries, and a 1 bank 10amp charging my 200ah agm house battery. I have them permanently wired to the individual battery circuits, and on a separate AC breaker which runs off my shorepower block. After a few days at sea, using the winches, accessories etc I get back to port with my batteries fairly drained, these chargers always have them back to 'green' for the next day. I compared the specifications of this smart charger and called Optima and Universal Battery to make sure their float charge specs as well as rapid charge specs match and they do.The overall construction and form factor of the charger is excellent. Durable connections and strong case, very glad I went with this unit and plan to upgrade my 10a single bank to another 20a dual bank when I add another 200ah UB4D battery. Highly recommended.
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    Top reviews from the United States

    Reviewed in the United States on December 6, 2011
    33 people found this helpful
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    Reviewed in the United States on December 18, 2011
    27 people found this helpful
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    Reviewed in the United States on February 15, 2012
    138 people found this helpful
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    Reviewed in the United States on April 21, 2018
    4 people found this helpful
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    Top reviews from other countries

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    CSR HDZ
    4.0 out of 5 stars Excelente producto y gran calidad
    Reviewed in Mexico on September 11, 2020
    dr.constructo
    5.0 out of 5 stars Perfect for my needs
    Reviewed in Canada on June 24, 2017
    3 people found this helpful
    Report
    Matt
    5.0 out of 5 stars Works awesome! Great Charger!
    Reviewed in Canada on August 25, 2020
    Max Entropy
    4.0 out of 5 stars Does the job
    Reviewed in Canada on September 30, 2014
    3 people found this helpful
    Report
    JohnnieMo
    5.0 out of 5 stars Using in a dual-bank RV
    Reviewed in Canada on July 19, 2021
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    JohnnieMo
    5.0 out of 5 stars Using in a dual-bank RV
    Reviewed in Canada on July 19, 2021
    It took me a long time to get to this project, but I'm happy I did. Over too many years I've seen RV batteries turn to dust from the on-board charging circuit. Leaving an RV plugged in 24/7 for weeks or months simply destroys lead acid batteries. Once you do go off grid, the batteries die in a matter of hours. (this happened to my wife one trip where she was in the woods freezing for 4 days).

    I vowed to never again destroy batteries. Insert Noco. I own tons on their chargers since they keep batteries living. They don't just dump electrons in that aren't wanted. They are smart about it. Over time this device will save batteries. I completely disconnected the on-board charger, and it wasn't an easy project. I then hooked this directly to the two batteries instead.

    In my first few trips I find it to be slightly less powerful than the old Jayco charger, but it also isn't roasting batteries. I've also added a Noco solar charger to keep the batteries topped up when it's in storage. Overall love NOCO products and will keep buying.

    I see since I purchased this then came out with a new Gen III version.
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