NOCO 12 Volt, 30 Amp Genius 3 Bank Battery Charger
Item #: GEN3   |    In Stock

NOCO 12 Volt, 30 Amp Genius 3 Bank Battery Charger
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NOCO 12 Volt, 30 Amp Genius 3 Bank Battery Charger

Item #: GEN3   |  In Stock

Today's Price: $239.95
Free Shipping! Free Shipping

Today's Price: $239.95

Best Value
Free Shipping
3 Year Warranty
Brand New
100% Compatibility

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Product Specifications for NOCO 12 Volt, 30 Amp Genius 3 Bank Battery Charger

BM Part #: GEN3
Voltage: 12 - 36 Volt
Capacity: 30 Amp (10 Amp Per Bank)
Length: 11.0"
Width: 7.3"
Height: 2.9"
Shipping Weight: 18.00Lbs
Warranty: 3 Year
Datasheet: Download
  • Charges Wet Cell (Flooded), Gel Cell, Calcium, AGM, Enhanced Flooded Battery (EFB), Maintenance-Free Battery (MF) Batteries
  • Advanced 8-Step Charger
  • Energy Efficient, 90% Efficiency
  • Rapid Charging Technology (RCT)
  • Varible Input Compensated (VIS)
  • Fully Interactive, MCU Controlled
  • Compact Lightweight Design
  • Fully sealed for harsh environments
Free Standard Shipping

Order today and receive free standard shipping on your NOCO 12 Volt, 30 Amp Genius 3 Bank Battery Charger. Only valid in the contiguous 48 states and not valid with any other offer. Physical address required (No PO Boxes).

Automatically diagnose, recover, charge, and maintain your batteries.


  • Advanced 8-Step Charger
  • Energy Efficient, 90% Efficiency
  • Rapid Charging Technology (RCT)
  • Variable Input Compensated (VIS)
  • Fully Interactive, MCU Controlled
  • Charges: Wet, Gel, MF & AGM Batteries
  • Compact Lightweight Design
  • Fully sealed for harsh environments
  • Designed in the USA
  • Meets ISO 8846 Marine standards and Ignition protected (US Coast Guard 33 CFR 183.410)


  • Battery Banks: 3 -- Charges up to three (3) single 12 volt batteries
  • Amps/Bank: 10 Amps
  • Total Amps: 30 Amps
  • Input Voltage: 70-130 VAC
  • Nominal Voltage: 12-36 VDC
  • Efficiency: 90% Approx.
  • Charging Voltage: 14.4V
  • Back Current Drain: ‹1Ah
  • Ripple: -2%
  • Cooling: Natural Convection
  • Charger Type: 8-Step, Switch-Mode
  • Battery Capacity: 14-230Ah
  • Battery Types: Wet, Gel, MF, AGM
  • Enclosure: IP68
  • Output Leads (Length): 6 Feet
  • AC Cord (Length): 5 Feet
  • Dimensions: 11.0" x 7.3" x 2.9"
  • Weight: 11.60 Lbs

Fully Interactive, MCU Controlled

The NOCO Gen3 Genius 12 volt, 30 amp battery charger is a fully automatic and fully interactive Micro-Control-Unit (MCU), making it faster, more powerful, more reliable, and smarter than the competitive brands. What does that mean to you? The charger will adjust itself to the changing current and voltage requirements to charge and maintain your batteries.

Compact Lightweight Design

The high efficiency power conversion allows the charger to be light and compact. This 3 bank battery charger is more versatile than other brands, and is easy to install and fit into tight locations.

Designed for Safety

Each of NOCO Genius chargers contains multiple safety features to protect against user errors. These safety features include: reverse polarity, short circuit, open circuit, over-temperature, over-charging, and spark proof battery hook-up.

Energy Efficient, 90% Efficiency

The NOCO Genius charger is 90% efficient. Why is that important? The higher the efficiency level, the lower the power waste. Unlike other battery chargers, which waste almost half of their rated current, the NOCO Genius charger always performs at an optimal level.

24-Hour Mode

Leaving a battery in permanent maintenance charge mode reduces battery life. In fact, most battery manufacturers recommend against it. That is why this charger shuts off when the charge sequence is complete. Then turn "On" every 24 hours to ensure proper maintenance of your battery and making sure your batteries are 100% charged.

Made in the USA

Designed and manufactured in the USA. With a research and development facility in Arizona and manufacturing facility in Ohio, NOCO has the ability to consistently produce the highest quality and the lowest return in the industry.

Advanced 8-Step Charger

Stage 1 & 2 - Diagnose and Test
Checks the battery voltage to make sure battery connections are good and battery is in a stable condition.

Stage 3 - Soft Start
Begins battery charging process with a gentle charge.

Stage 4 - Bulk Charge
Begins Bulk battery charging process, returns 80% of battery capacity and voltage to 14.0 volt.

Stage 5 - Absorption Charge
Switches to a constant current charge rate to bring your batteries close to 90% charge.

Stage 6 - Taper Charge
Charges at low current levels until battery has reached 95% of its capacity

Stage 7 - Top-Off Charge
Charger initiates top-off charge to bring the battery to 100% charge.

Stage 8 - 24 Hour
Shuts off, but constantly monitors your battery by providing a gentle charge every 24 hours for maximum battery life.

Tech Tip: Using A Multi-Bank Charger

Each bank of this charger is 10 amp. Combined, this is an output of 30 amps (3 banks by 10 amps each). This is commonly used in two ways:

  • Connect each bank to separate battery systems, charging both by 10 amp each.
  • Connect both amps to the same battery system, charging it by 30 amps total.
7 Reviews | 4.6 out of 5
5 stars (4)
4 stars (3)
3 stars (0)
2 stars (0)
1 star (0)
Would recommend this product.
What our Customers are saying
April 21, 2017
by on April 21, 2017

This battery charger is awesome! Simple to install and operate. Best purchase i've made for my boat!

Would recommend to a friend?
Great so far
September 26, 2016
by on September 26, 2016

Charger works great.charges superfast.Battery mart is reliable and had great service.

Would recommend to a friend?
the best so far
June 23, 2015
by on June 23, 2015

Great product but I had a time mounting it in my bass boat - the mounting screws have deep pockets the screws fit into and in tight spaces you'll be challenged to get lined up. I ended up mounting it to a wood runner and attach the wood strips to the floor on the battery compartment.

Milford, IN.
Would recommend to a friend?
The noco genius 3bank charger
September 2, 2012
by on September 2, 2012

The charger has worked well the short time that I have used it. As far as durability only time will tell. So far so good? Installation was very easy.It fit the same footprint as my old charger and that was a big help.

ST Charles mo
Would recommend to a friend?
had to send back for warrent work
April 23, 2011
by on April 23, 2011

the green led light for one of the banks did not come on when fully charged I have to pull the unit and send back. not very happy about that should have been checked before it was sent out from factory.

Burlington, NJ
Would recommend to a friend?
NOCO 12 Volt, 30 Amp Genius 3 Bank
April 5, 2011
by on April 5, 2011

I just install this unit on my bass boat and so far it works just fine. Charges my AGM batteries very quickly. Seems to be well constructed so we'll see how well it holds up to the pounding on the water. I had a hard time finding a unit that was thin enough to fit in my boat and this one fit perfect. So far, so good!

Mesa, AZ
Would recommend to a friend?
Excellent Product
April 30, 2010
by on April 30, 2010

I have yet to find a drawback to this product. I am replacing another brand 3 bank charger. This product recognizes the type of battery whether Lead acid, AGM, or Gel. I was impressed with the price vs technology. I was glad to see the USA construction and it also weighted my purchase. It doesnt get any simpler to install. I spoke to the service deptartment regarding extending the leads. The t

Jacksboro, TX
Would recommend to a friend?