Ultralight 403 AC
915 Wh Trolling motor for kayaks, canoes and very light boats


Ultralight 403 AC

915 Wh Trolling motor for kayaks, canoes and very light boats


MSRP: $ 2,499.00

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Product description

  • Weight as low as 11.0 kg complete with battery
  • 1 HP equivalent
  • With 915 Wh high-performance lithium battery
  • Comes including charger, throttle, onboard computer, GPS-based range calculation and emergency magnetic kill switch
  • New angler mount with tilt and park mechanism, plus simple integration with the kayak’s steering unit
  • Easy to mount on fishing kayaks
  • Range of up to 100 km


Ordering information

  • Item number: 1407-00  | EAN: 4260113695531
  • Equipment included: Ultralight 403 AC with battery, charger, remote throttle, on-board computer, GPS-based range calculation and emergency magnetic stop key
  • Warranty: 2 years for non-commercial use
  • California residents please click here for Prop 65 warning

  • Ultralight 403 AC

    Torqeedo Ultralight 403 AC Torqeedo Ultralight 403 AC

    Torqeedo’s lightest outboard, the Ultralight 403 AC, gets you to your favorite spot faster, and lets you stay there longer. It offers reliable performance, an innovative new mount and all the high-tech features of a genuine Torqeedo system: GPS built-in, real-time range and runtime display, solar charging and the latest lithium battery technology.

    Our extremely light Ultralight 403 AC fits on all popular types of kayak and canoes, and there are special models for special requirements.

    Ultralight 403 AC – Benefits:

    • Weight including battery: 11.0 kg
    • Range of up to 100 km
    • Easy to mount on fishing kayaks
    • Completely waterproof (IP67)
    • Superb usability with a wealth of smart features
    Torqeedo Ultralight 403

    Steering / tilting / auto-kickup
    Optimised propeller design
    High-performance lithium battery
    with integrated GPS
    New mount with tilt and park mechanism – simple integration with the kayaks steering unit
    Display on the throttle – provides information on: battery charge status, remaining range, speed over ground, input power
    Maximum-efficiency propulsion
    for premium performance and range
    Extended navigation functions
    with TorqTrac (not included)

  • Range

    Ultralight 403 AC with Integrated Battery (915 WH / 29.6 V / 31 Ah)



    Speed in km/h* Range in km* Running time in hours
    Slow 4.2 101.0 24:00
    Half throttle 6.0 71.0 11:50
    Full throttle 9.3 21.7 02:20

    * Dependent on factors such as type of boat, load, propeller and ambient conditions. Figures for speed and range are indicative only and are not a guarantee of performance.
    Example: Fishing kayak Hobie Mirage Revolution (4.1 m / 26.3 kg)

    Information on range and speed

    For a displacement boat making way through the water, the required propulsive power increases in proportion to the cube of the speed. This means that if you want to double your speed, you need eight times as much power.

    And vice-versa, a small reduction in speed is enough to increase the achievable range substantially.

    The Torqeedo Ultralight's on-board computer calculates the remaining range constantly, by linking the motor's consumption data with the charging level of the batteries, and the speed over the ground from the GPS. This allows you to read the remaining range in real time from the motor display or the smartphone app TorqTrac.


  • Video Clip

    Video Ultralight 403 C

    Torqeedo Ultralight 403 C

    Learn about the benefits of our lightest motor, the Ultralight 403 C, for yourself.


  • Specifications

    Technical Data Ultralight



    Ultralight 403 AC
    Input power in watts 400
    Propulsive power in watts 180
    Comparable petrol outboards (propulsive power) 1 HP
    Comparable petrol outboards (thrust) 2 HP
    Maximum overall efficiency in % 45
    Static thrust in lbs* 33
    Integrated battery 915 Wh Li-Ion
    Nominal voltage 29.6
    Final charging voltage 33.6
    Total weight in kg 11.0
    Motor weight without battery in kg 5.0
    Weight of integrated battery 6.0
    Shaft length in cm 48
    Standard propeller
    (v = speed in km/h at p = power in watts)
    Alternative propeller options -
    Propeller Guide
    Maximum propeller speed in rpm 1,200
    Control Throttle
    TorqLink No
    Steering Connects to kayak steering, lockable
    Tilting device Manual, with impact protection
    Trim device Manual, 4-step
    Stepless forward/reverse drive Yes
    Integrated on-board computer Yes
    * Torqeedo static thrust measurement is based on internationally accepted ISO standards. Static thrust figures for conventional trolling motors are typically measured differently, which results in higher values. To compare Torqeedo static thrust data with conventional trolling motors, add approximately 50% to the Torqeedo static thrust values.



    Technical information according to COMMISSION REGULATION (EU) 2019/1782:


    Technical information:
    Power Supply EDAC EA11012E-240
    Input Voltage 100 - 240 VAC
    Input Frequency 50 - 60 Hz
    Output Voltage 24 VDC
    Output Current 4.16 A
    Output Power 100 W
    Average operational efficiency ≥ 89 % at 25 %, 50 %, 75 %, 100 % output power
    Efficiency at light loads (10 %) ≥ 79 %
    No Load Power consumption ≤ 0,15 Wat at 0 % output power



    Technical Drawing




  • Product brochure


    Your information material – Everything at a glance

    You will find all important information about the Ultralight in our digital brochure. Download the PDF quickly and easily or read it conveniently online while protecting the environment.


  • Tips

    Ultralight 403 AC FAQ

    • What power does the integrated battery deliver?

      The battery has a capacity of 915 Wh, i.e. 31 Ah at 29.6 V.

    • How long does it take to recharge the battery?

      When the battery is completely discharged it takes approx. 10,5 hours to fully recharge it.

      With the solar charger 50 W (accessory) you can charge anytime, during travel and while the sun is out. 

    • What useful life can I expect the lithium batteries to have?

      The life expectancy of lithium batteries in recreational use is, more or less, independent of charging cycles.

      There is no memory effect either, i.e. you can fully charge them after each trip irrespective of the charge status shown in the display.

      Generally speaking, a capacity loss of approx. 4 % per year is to be expected. Capacity loss will, however, accelerate if the battery is permanently exposed to heat. Also storing the battery always fully charged will accelerate ageing.

      There are no concerns about using the battery in high temperatures, we recommend that you take the battery out of the sun and store it in a cool place after use.

      Your battery must be returned to a Torqeedo Service Centre for service 8 years after the date of manufacture.

    • Can the Ultralight 403 AC be connected to the steering?

      Yes, the Ultralight 403 AC can be connected to your kayak's steering system. Please refer to your kayak's instructions and our information on mounting.

    • What happens if I capsize?

      If the kayak capsizes, the motor stops automatically to prevent injury – provided the magnetic kill switch is attached to your wrist or life jacket.

      The motor only runs when the magnetic kill switch is placed in the prescribed position on the remote throttle.

      Should you fall overboard, the magnetic kill switch will go with you and the motor will stop immediately.

    • What is the warranty on the Ultralight 403 AC?

      The Ultralight 403 AC has a 2-year warranty from the date of purchase for non-commercial use.

    • What mounting options are available?

      Use with Hobie kayaks: We recommend the Hobie "evolve" product (available from Hobie dealers).

      Use with Grabner kayaks: Please use the Grabner mounting kit.

      Use with Prijon kayaks: Please use the Prijon rudder mounting.

      Poucher-Faltboote: Please use the motor mount developed by Poucher.

      All others: The ultralight 403 AC can be mounted on just about any kayak using the angler mount provided.