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NOCO Genius On-Board Battery Charger - AC to DC - Waterproof - 1 Bank - 12V - 10 Amp

NOCO Genius On-Board Battery Charger - AC to DC - Waterproof - 1 Bank - 12V - 10 Amp

Item # 329-GEN1
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Submersible, on-board smart charger draws power from a wall outlet to charge and maintain a 12V battery at 10-amps. Fully-sealed, waterproof construction is ideal for marine applications. Saltwater tested and ignition protected for safety. Call 800-298-8924 to order NOCO battery charger part number 329-GEN1 or order online at etrailer.com. Free expert support on all NOCO products. Guaranteed Lowest Price and Fastest Shipping for NOCO Genius On-Board Battery Charger - AC to DC - Waterproof - 1 Bank - 12V - 10 Amp. Battery Charger reviews from real customers.
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NOCO Battery Charger - 329-GEN1

  • Boat
  • Trolling Motor
  • Generator
  • Electric Vehicle
  • Industrial Equipment
  • Battery Charger
  • NOCO
  • 12V
  • Wall Outlet to Vehicle Battery
  • Charges Only
  • 230 Ah

Submersible, on-board smart charger draws power from a wall outlet to charge and maintain a 12V battery at 10-amps. Fully-sealed, waterproof construction is ideal for marine applications. Saltwater tested and ignition protected for safety.


  • On-board AC-to-DC smart charger quickly charges and maintains a 12V battery
    • Perfect for boats, trolling motors, generators, electric vehicles, and industrial equipment
  • Multi-stage charging algorithm charges 2x faster than traditional chargers without overcharging
    • Analyzes battery condition to provide a customized charge
    • Built-in battery desulfator restores lost battery capacity
  • Heavy-duty 3/8" eyelet connectors provide maximum contact with terminals
    • Built-in 15-amp fuse protects electronics from dangerous overloads
  • Completely sealed, waterproof design is fully submersible - perfect for marine applications
    • Tested to resist saltwater corrosion
  • Meets USCG-33 CFR 183.410 requirements for ignition protection
  • AC port plug (sold separately) creates a connection point for easy access to AC power


  • Application: 12-volt lead-acid batteries rated up to 230 amp-hours
  • Battery types supported: wet cell, gel cell, AGM, enhanced flooded, and maintenance-free batteries
  • Number of battery banks: 1
  • Maximum charging amperage: 10 amps
  • Eyelet cord length: 75-1/2"
  • AC cord length: 72"
  • Working voltage: 70 - 130 VAC (50 - 60 Hz)
  • IP rating: 68
  • Dimensions: 7" long x 7-1/8" wide x 3-1/8" thick
  • Weight: 6.4 lbs
  • 5-Year limited warranty

NOCO GEN1 On-Board Marine Battery Charger Diagram

The rugged NOCO Genius GEN1 on-board smart charger quickly charges and maintains a 12-volt lead-acid battery. The battery bank efficiently charges deep cycle and starter batteries up to 230 amp-hours. It's great for boats, trolling motors, generators, and a wide range of electric vehicles and industrial equipment. With a fully submersible design, the GEN1 was built to handle harsh marine environments, while keeping your batteries in peak condition.

Multi-Stage Smart Charging Technology

The NOCO GEN1 smart charger uses an 8-stage charging cycle to quickly and efficiently charge your battery. This ensures that the battery safely reaches maximum capacity without being overcharged.

NOCO GEN1 Genius Battery Charger Advanced Smart Charging Technology

In the first step of the charging process, the charger will analyze the battery's condition and state of charge. The charger then uses this data to diagnose the battery's health and ensure it can be safely charged. If the battery is deeply discharged or sulfated, the charger will automatically enter the recovery stage to repair the battery by pulsing small amounts of current.

Once the unit has determined that the battery's condition is stable, it will initialize the charging process by providing a constant, gentle charge. The charger gradually increases the charge during the bulk stage and quickly charges the battery to 80-percent capacity.

As the battery nears full charge, the GEN1 enters the absorption stage and delivers small amounts of current to limit battery gassing and safely bring the battery to 90-percent capacity. The charger will then begin optimization of the battery, bringing it to full capacity and optimizing it for increased run time and performance.

The final step of the charging process, maintenance, monitors the battery for drops in power and supplies the correct current to keep it fully charged. If a drop in voltage is detected, the charger will begin the optimization cycle to keep the battery fully charged.

Heavy-Duty Eyelet Connectors

NOCO GEN1 Heavy-Duty Eyelets

A set of 3/8" eyelets connect the GEN1 to your battery. Over-molded connection point stands up to heavy usage and keeps connections safe from the elements. Built-in 15-amp fuse protects each connection against dangerous overcurrent.

Quickly Charge and Maintain Batteries from 120VAC Power Source

NOCO GEN1 AC Plug for Wall Outlet Charging

The GEN1 plugs into an available wall outlet to quickly charge and maintain your battery. High-frequency switch-mode technology converts AC power into safe DC power to fully charge batteries. An onboard microcomputer monitors and controls this charging process to minimize power loss and maximize efficiency. Included hardware lets you mount the unit in an enclosed compartment, garage, or workspace.

NOCO GEN1 On-board Battery Charger Charging Times Diagram

The table above provides a quick reference for how long it will take the GEN1 to charge batteries with various amp-hours.

Rugged Submersible Design

NOCO GEN1 Waterproof and Ignition Proof Design

The GEN1 was built to handle extreme marine conditions. The unit has an IP68 rating, which means it can handle being fully submerged in water, and it's protected against solid particles like dust or sand. Its ignition protected for safe and worry-free operation around marine engine compartments and fuel tank spaces. Saltwater won't cause issues either. The charger has been thoroughly tested to resist corrosion.

The housing is made from tough Lexan resin that protects the internal electronics against vibration and impacts. The unit can handle being dropped, kicked over, and just about anything else your day brings.

AC Port Plug for Plug-and-Play Charging

NOCO GEN1 GCP AC Port Accessory

Available AC port plugs (sold separately) from NOCO let you easily setup your GEN1 charger for plug-and-play charging with any extension cord. The plug creates a "pass through" AC charging port on a surface, so you can quickly connect to the charger when it's mounted inside a compartment on a truck, boat, trailer or RV. This allows you to easily access the charger for charging engine block heaters, trolling motors, batteries, and other equipment. A snap-fit cap creates a watertight seal to protect the connection whenever you're done.

GEN1 NOCO Genius On-Board Marine Smart Battery Charger - Submersible - AC to DC - 1-Bank - 10 Amp - 12V

Installation Details 329-GEN1 Installation instructionsAlternate Instructions 329-GEN1 Installation instructions

California residents: click here

Customer Reviews

NOCO Genius On-Board Battery Charger - AC to DC - Waterproof - 1 Bank - 12V - 10 Amp - 329-GEN1

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

Submersible, on-board smart charger draws power from a wall outlet to charge and maintain a 12V battery at 10-amps. Fully-sealed, waterproof construction is ideal for marine applications. Saltwater tested and ignition protected for safety.

- 329-GEN1

Works Perfect! 791794

- 329-GEN1

This convertor was installed on a 1999 Volkswagan Vanagon. Volkswagan did not install a coach battery charger on this little camper. Made for a nice add on. Sorry about no picture. Camper left on a trip 30 minutes after installation. Might get a picture to you later. 616993


Ask the Experts about this NOCO Battery Charger

  • Troubleshooting NOCO Genius On-Board Battery Charger
    The NOCO Genius On-Board Battery Charger - 1-Bank - 10 Amp # 329-GEN1 appears to be working correctly unless you also have the error LED lit. It simply may be showing that your battery is not holding the charge so it is constantly charging. I recommend testing your battery prior to replacing the charger.
    view full answer...
  • What Is the Amp Hour Capacity When Combining Two Six Volt Batteries In Series
    The voltage will double when connecting batteries in series but the amp hour capacity will remain the same. Therefore, if you connect two 6 volt batteries in series with a 250 amp hour capacity then the voltage output will be 12 but the amp hour capacity will remain at 250. In order to double amp hour capacity you would need to connect two 12 volt batteries in parallel as the voltage would remain at 12 but the amp hour capacity would double. In regards to charging, you can charge both...
    view full answer...
  • How to Charge Two 6V Batteries Wired in Series
    In order to connect your two 6 volt 220Ah batteries together in series I recommend using a minimum of 4 gauge wire on each terminal. In order to charge the batteries you can use either a 6 volt or 12 volt battery charger, it all just depends on how you want to charge them. If you want to charge both together then you will need to use the battery charger in 12 volt mode (if applicable) and at the end of the series. If you want to charge each battery separately then you will need to use the...
    view full answer...
  • What is Max Wattage Output of NOCO Genius On-Board Battery Charger # 329-GEN1
    The max wattage of the NOCO Genius On-Board Battery Charger # 329-GEN1 is 120 watts or 10 amps.
    view full answer...
  • Why is Truck Battery Draining With Trailer Plug Disconnected
    There could be many reasons why your truck's battery is draining when the trailer's electrical plug is disconnected. However, only one has to do with the trailer causing the issue. If your vehicle battery maintains its charge when the trailer is NOT plugged in, this would point to a rather unusual situation where your trailer battery is actually grounding through the gooseneck coupler and passing the current through the ball and eventually to the frame of your tow vehicle. Check both...
    view full answer...
  • Best NOCO Battery Charger for Fast Charging of Two 6V Batteries Wired in Series
    The best battery charger to use in your application where reduced charging time is the primary goal is the 10-amp GEN 1 model # 329-GEN1. From 50% depletion the GEN1 will charge your batteries in approximately 10.5 hours according to my contact at NOCO. The GEN1 is also designed for Marine applications so it is a waterproof charger.
    view full answer...
  • Troubleshooting Alternating Red and Green LEDs on Noco Genius Gen1 Battery Charger
    The NOCO Genius On-Board Battery Charger - AC to DC - Waterproof - 1 Bank - 12V - 10 Amp # 329-GEN1 you referenced is designed to charge your 12v battery at 10 amps. The flashing LEDs show an error and I've attached the options to troubleshoot. You should have a solid red when charging and a solid green when fully charged.
    view full answer...
  • How to Charge Multiple Batteries of Different Voltages
    When charging batteries in a multi-battery setup it is always best to charge each one individually. In the case of two 6-volts wired together in series you would need to keep these connected together and charged as one unless your charger is rated for use with 6V batteries, like our CTEK charger # CTEK56191. Multiple series-wired batteries can be charged all together but this will take a very long time and the battery with the highest Ah capacity will tend to demand most of the available...
    view full answer...
  • Can Umbilical Between Motorhome and Flat Towed Vehicle Be Used to Charge Vehicle Battery
    You can certainly do that. You'll want to be sure to wire the pin on the vehicle side to correspond with the 12-v power supply pin on the 6-way motorhome trailer connector however. Some 6-ways use the center pin as the brake controller output, some use it as the 12-volt power feed, so you'll want to ensure both sides are wired the same way. Roadmaster offers a purpose-built circuit protected kit for this, part # RM-156-25. Keep in mind that the circuit is capable of providing a maintenance...
    view full answer...
  • Trobleshooting Lid Lift Function on Maxxair 7500 Fan
    Since the lid motor on your MaxxAir 7500 vent with powered lift # MA00-07500K is operating but the lid stops midway unless you give it some manual assistance the issue is either power-related or the result of a damaged operator mechanism # MA10-20281K-1AF. My tech contact at MaxxAir said that the behavior you describe is often related to low available input power. The vent will detect if the incoming operating voltage is low or marginal and it will stop the lid opening. This is a safety...
    view full answer...
  • Amount of Power Drawn By Optronics Platinum Burners Off-Road LED Lamps
    The Optronics # LS204RW Platinum Burners lamps draw about .3 amps while the # LS16A2WS (which we don't offer) draws about .5. A motorcycle battery would be a good balance between available power and reduced size and weight, and would provide the amount of power you'd need. If you don't already have one, you'll need a charger like # 329-GEN1 to keep the battery charged when not in use.
    view full answer...
  • How To Charge 12 Volt Battery In Enclosed Trailer Powering Lights
    Yes, it is possible to use a 12 volt deep cycle marine battery on a trailer to power lights, fans, etc. That said, you will need to combine the amp draw rating of all accessories and then subtract this from the amp hour rating of the battery to make sure you have have enough power. However, most fans and lights don't require much power so you should be alright so long as you are mindful. The Optronics Flexible LED Light Strip part # UCL90CB for example only draws 2.7 amps. I have attached...
    view full answer...
  • Will 12 Volt Feed from 7-Way on Tow Vehicle Overcharge Trailer Auxiliary Battery
    It's impossible for your trailer-mounted auxiliary battery to be overcharged by the vehicle battery via the 12 volt feed on the 7-way since it only passes through a low current trickle-type charge. In fact, this is only enough for a maintenance charge - if your trailer battery is completely depleted, this method of battery charging will not provide a full re-charge. For that, you need to use a battery charger like # 329-GEN1. The battery isolator solenoid # TR118665 along with the fuse...
    view full answer...
  • 12-Volt Accessory Circuit from Trailer Connector Not Keeping Trailer Battery Charged
    For starters, be aware that the limited wire gauge feeding this 12-volt circuit from the 7-way plus the distance the two batteries are away from each other means that although the tow vehicle battery can provide a maintenance charge to the trailer battery, it won't have sufficient power to charge it once it's discharged or nearly so. A good battery charger like the NOCO # 329-GEN1 should be used to fully charge the battery when shore power is available (which it sounds like you're doing...
    view full answer...
  • Battery Charger for Maintaining the Charge on a 2005 Ford Excursion Diesel with 2 Odyssey Batteries
    The Redarc In-Vehicle BCDC Battery Charger # 331-BCDC1225D is designed to charge an auxilliary battery form the vehicle alternator output or from the starting battery on the vehicle. This charger would not work for your application unless you have a solar panel that can be ran to the yellow input wire of the # 331-BCDC1225D charger. In that case the solar power can be used to help maintain the vehicle batteries and keep them from overcharging while you are away from the cabin for extended...
    view full answer...
  • Can I Power Lights With Breakaway Battery
    You can use a bigger battery with your breakaway to power the lights on your trailer without being plugged into the truck. We do recommend to have a separate battery for the breakaway switch and an auxiliary battery for the lights on your trailer because if the battery ever drains it is dangerous to not have your breakaway switch active. I recommend to give an auxiliary battery, wire the lights to a switch and then the battery. You can charge the battery with an AC to DC charger like...
    view full answer...

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Info for this part was:

Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Edited by:
Daron K
Written by:
Brian T

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