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NOCO Genius 12v 10 Amp Marine On-Board Battery Charger GEN1

Was: $169.95
Sale Price: $129.95
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Product InformationStore Part Number: GEN1


Replaces: Guest GU2611A-1

The NOCO Genius GEN1 charger is an 8 step, fully automatic switch-mode battery charger, which automatically determines the condition of your battery before beginning its charge cycle. It will only charge when the battery needs it, and will fully maintain your battery when it is in storage or between uses. All of the Genius line of battery chargers are programmed for optimal battery charging and maintenance, with proprietary Rapid Charging Technology(RCT). The smart microprocessor and advanced high frequency design will charge batteries twice as fast as a conventional transformer based marine charger, while always preventing overcharge. This assures you of maximum battery life and less downtime. Genius chargers also utilitize Variable Input Compensation, which means that your charger will work as it should, delivering its full, correct voltage and amperage, whether or not long extension cords or low AC power are used.


  • 90% Energy Efficient, providing the best charge while wasting less energy than other chargers
  • Fully Interactive, built in Micro-Control Unit for decreased charge times
  • Variable Input Compensated
  • Fully sealed waterproof design rated IP68 enclosure, yet factory serviceable
  • Compact Lightweight design allows for a smaller footprint than other chargers
  • RECOVERY MODE: Recovers deeply discharged & sulfated batteries with pulse charging
  • Advanced 8 Step Design
  • 10 amp maximum output
  • Safe for AGM, Gel and Wet Cell Lead Acid batteries
  • Waterproof & Easy Install
  • Optimal 3 Step Charging
  • Spark Free Hook Up
  • Reverse Polarity Protection
  • Over Voltage Protected
  • Short Circuit Protection
  • Overload Protection
  • Line Regulation
  • Load Regulation
  • Thermal Protection
  • Output Regulation
  • 3 Year Warranty


NOCO Genius chargers are waterproof and fully automatic!

Tech Specs

  • Dimensions (LxWxH): 10.2 x 9.2 x 5.8 in
  • Weight: 3.8 lb
  • Shipping Weight: 6 lb
  • DC Output Amps: 10 A
  • DC Output Voltage: 12 V
  • Output Voltage Charging: 14.4 VDC
  • Back Current Drain: < 1 mAh
  • Absorption Voltage: 14.4 V
  • Maximum AC Current @ 108 VAC: 1.5 A
  • Maximum AC Current @ 90 VAC: 1.5 A
  • AC Input Volts: 120 VAC
  • AC Input Volts Freq.: 50-60 Hz
  • AC Input Volts Range: 70-130 VAC
  • Max Inrush Current, Single Cycle: 2.0 Max
  • Float Current: 1000 mA
  • Model: Gen1
  • Manufacturer: NOCO
  • Float Voltage: 13.5 typical
  • Typical Efficiency: 87%
  • Maximum Power Output, Continuous: 95 W
  • Maximum Power (+/- 3%) @ 25° C: 100 W
  • Maximum Output Amps Single Surge: 10.5 A
  • Maximum Input Current: 1.5 A
  • Working Temperature: 0° to 50° C
  • Storage Temperature: -20° to +60° C
  • Over Temperature: Auto overtemp foldback
  • Ripple and Noise: 50mA at 30 kHz
  • Enclosure: Polycarbonate, sealed and potted
  • Output Banks: 1
  • Recommended Use: marine, outdoor harsh environments
  • Regulatory Approval: ISO8846, USCG 33CFR1830-410, FCC part 15
  • Manufacturer Part #: GEN1
  • Made In: China

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Reviews and Ratings

5.00 Average
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Rated 5.00/5 Stars from 1 customer reviews.

Do you own the GEN1? 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.

No temperature compensation?
I was happy with the Genius until I purchased from a BatteryMinder 2012 with temperature compensation.

The 2012 (rated at 2 Ampere) has spent several hours in ABSORPTION mode on a flooded lead-acid battery which I charged just a day or two ago with the Genius; the temperature here is about 50 F.

It is nice to have a waterproof 10 Ampere charger (the NOCO) which can be used safely on a tractor battery out in the rain and cold, but NOCO really ought to include temperature compensation, even if it increases the price a bit.
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Written by on Dec 16, 2018. — (0 of 1 customers found this review helpful

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Manuals & Tutorials


Data Sheet


Chargers Tutorial

Why does it read 13 volts?

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Grants Pass, OR 97526
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