Torqeedo Ultralight 403

Torqeedo Ultralight 403

Torqeedo

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The best kayaks and light boats means of propulsion

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Torqeedo Ultralight 403 electric outboard engine for kayaks and light boats

The name says it all – the ultra-lightest outboard on the market: 7 kg including battery.

The integrated on-board computer provides a GPS-based calculation of the remaining range.

The Ultralight 403 doesn't limit your paddling performance but can – when called on – give you the right push: ideal against the current, the wind or tired arms.

It packs a powerful punch and shows real endurance when it matters.

Its customised mounting options means it can be used with many makes of kayak and canoe such as Hobie, Grabner, Prijon and Rotomod.

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

Motor, battery and remote throttle cable are completely waterproof to IP 67. Regardless of whether your are kayaking on inland water or the sea, on protected or unprotected waters – the Ultralight 403 is your ideal companion for every adventure

Also for very small boats...

Torqeedo_ultralight_system

Benefits:

  • Weight including battery: 7.3 kg
  • Maximum speed up to 10 km/h (boat-dependent), faster that any trolling motor
  • Range of up to 40 km at low speed (also boat-dependent)
  • completely waterproof (IP 67)
  • Precise GPS-based calculation of remaining range
  • Solar rechargeable – including during the voyage

Ultralight 403 with Integrated Battery (29.6 V / 11 Ah)

Information on Range and Speed

When travelling through water, displacement increases power required in proportion to the cube (third power) of the speed. This means that doubling water speed increases the power required eightfold.

Conversely, it of course also means that only a slight reduction in speed will increase the range attainable significantly. Simply reducing speed by e.g. half a knot has a considerable effect on the remaining range.

Since mental arithmetic to the power of three is quite tricky, the on-board computer of the Ultralight constantly calculates the remaining range for you. To do this, it combines the consumption data from the motor with the charge level of the batteries together with the speed over water obtained via GPS. This means you can read the remaining range in real time from the Ultralight's display. Using the TorqTrac App you can even read the remaining range from a map on your smartphone.

Input power in watts400
Propulsive power in watts180
Comparable petrol outboards (propulsive power)1 HP
Comparable petrol outboards (thrust)2 HP
Maximum overall efficiency in %45
Static thrust in lbs*33
Integrated battery320 Wh Li-Ion
Nominal voltage29.6
Final charging voltage33.6
Total weight in kg7.3
Motor weight without battery in kg4.4
Weight of integrated battery2.9
Shaft length in cm45
Standard propellerv10/p350
(v = speed in km/h at p = power in watts)
Alternative propeller options-
Maximum propeller speed in rpm1,2
ControlRemote throttle
SteeringProvision to connect to kayak rudder; lockable
Tilting deviceManual with grounding protection
Trim device-
Stepless forward/reverse driveYes
Integrated on-board computerYes

Torqeedo electric inboard and outboard engines


When they founded Torqeedo, concepts such as clean tech and electromobility had not yet been coined. But it was already obvious back in 2004 that electric motors would become increasingly important in the future due to global population growth, the growth of the middle classes around the world, limited oil reserves and efforts to limit global warming.


And since a good idea is also an obligation – the lack of competitive products on the one hand and the future significance of electric propulsion systems on the other gave rise to Torqeedo.

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