view large photo

Swipe Photo to View More

NOCO Genius 12v 24v 36v 12 Amp 3-Bank Marine On-Board Battery Charger

Was: $214.95
Sale Price: $169.95
Free Ground Shipping to Lower 48 States *
Out of Stock
Share this item with your friends

Product InformationStore Part Number: GENM3


The NOCO Genius GEN Mini 3 is an On-Board Battery Charger for charging and maintaining three 12-volt Marine, Starter or Deep-Cycle battery. The NOCO GENM3 is waterproof, shock and vibration resistant rugged design can be mounted directly onto a variety of applications, including a boat, trolling motor or generator, as well as, a full range of electric vehicles and industrial equipment.

The Gen Mini 3 monitors battery activity for safe, fast and efficient charging of Wet, Gel, AGM and Maintenance Free batteries without the worry of overcharging. And it's one of the most advanced charging systems designed for improved battery performance and longevity.


  • A 3-bank, 12 Amp (4 Amps per bank) on-board battery charger.
  • Charges starter and deep-cycle batteries up to 120Ah per bank.
  • 100% completely sealed and waterproof design rated at IP68.
  • Spark-proof technology and reverse polarity protection.
  • Provides full-charge output even with low-line voltages.
  • Built-in battery desulfator to recover worn-out batteries.
  • Charges 2X faster than most marine battery chargers.
  • Saltwater-tested to combat corrosion.
  • Ignition Protection and meets USCG-33 CFR 183.410 requirements.

Tech Specs

  • Dimensions (LxWxH): 8.9 x 6.9 x 2.6 in
  • Weight: 8.6 lb
  • Shipping Weight: 11 lb
  • Input Voltage AC: 70-130 VAC, 50-60 Hz
  • Charging Voltage: 14.4 V
  • Charging Amperage: 12 A (4 A Per Bank)
  • Efficiency: ~90%
  • Type of Batteries: (3) 12 V Lead-Acid Batteries
  • Model: GENM3
  • Manufacturer: NOCO
  • Battery Chemistries: Suitable for Wet Cell (Flooded), Gel Cell, Calcium, AGM, Enhanced Flooded Battery or any Maintenance-Free Battery
  • Battery Capacity: Ideal for Batteries Between 20 to 120 Amp-Hours per bank. Suitable for Maintaining All Battery Sizes.
  • DC Cord Length: 6.3 ft
  • AC Cord Length: 6.0 ft
  • Housing Protection: IP 68
  • Cooling: Natural Convection
  • Warranty: 5 Years
  • Manufacturer Part #: GENM3
  • Made In: China

Customers who bought this product also bought:

Reviews and Ratings

5.00 Average
5 Stars 2
4 Stars 0
3 Stars 0
2 Stars 0
1 Stars 0
Rated 5.00/5 Stars from 2 customer reviews.

Do you own the GENM3? Please, tell us what you think about it. It helps us provide you with better products. Please note that it may take up to 72 hours for your review to appear.

Great charger
Well made, not too bulky, perfect for a 36v trolling motor bank
Is this review helpful?
Written by on Jun 01, 2019. Verified Purchase — (2 of 3 customers found this review helpful
Good Charger for tight places.
Charger was purchased to replace a Minn Kota 310 D which was twice as big and only lasted 2.5 years. Really happy with this charger so far and really like the compact size.
Is this review helpful?
Written by on Jan 03, 2020. Verified Purchase — (1 of 1 customers found this review helpful

See More Reviews

Manuals & Tutorials

Specification Sheet

Warranty Sheet


Order Line: 1-800-362-5397
M–F 6am–5pm PST
Tech Help: 541-474-4421
Fax: 541-471-6014
276 Tech Way, Suite A
Grants Pass, OR 97526
Buy Veteran and Blueribbon Coalition Buy Veteran Sharetrails