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Watt & Sea Cruising 300 Hydrogenerator 610/970mm

  • $ 4,200.00 USD


Cruising Hydrogenerators

A good management of the energy on board is the key point to sail in total serenity, regardless the consumption of the on-board electronics or other electrical appliances. Watt&Sea's hydrogenerators propose an energy self-sufficiency solution on board of cruise or race boats, in the respect of the environment.

Stemmed from ocean racing research, the first Watt&Sea hydrogenerator gets started in 2008 with the objective of an optimal output associated to a negligible drag, letting the boat sail with a positive energy while loading the batteries. Our hydrogenerator has since then being improved taking into account users' comments, so that we are proposing today an even more reliable and efficient product.

Validated on all seas around the globe, they are the most powerful, reliable and lightest available on the market.

General view

Fastening on the transom...

Watt&Sea's hydrogenerators are usually fastened on the transom of the boats thanks to the fastening kit supplied (adapted to straight and vertical transom). The lifting up and down are similar to a rudder blade's handling. The charge power being so important, it allows to lift the hydrogenerator up when batteries are fully loaded. 
Handling makes it easier thanks to high quality steering : an Antal low friction ring to divide the effort plus a Harken cam cleat to maintain the unit in its position.

 An input of energy up to 300W (24 A in 12 V), for more comfort in the respect of the environment !

The CRUISING 300 is usually recommended to boats measuring up to 35 feet: 
Available in two lengths in order to optimize the immersion of the propeller depending on the place choosen for the fitting.
Ideal on boats sailing generally from 4 to 6 knots, and consuming around 8 Amps (12 V installation)
Delivered in standard with the 240 mm diameter propeller (output 8 Amps at 5,2 knots), it will produce even more with the 280 mm propeller (8 Amps at 4,5 knots)

Available in 2 versions:

short (Ref. PK-610-300)
long (Ref. PK-970-300)

Output 100W from 5 knots | Light weight : 6.3 kg | Two-year warranty | Quiet | Hydrodynamic design

Packs characteristics :


3Nominal power 300 W


Max output power 600 W

12 Vcc or 24 Vcc autodetected

48 V in option

Input for solar panel 7,5-50 Vcc / 14 Amps

Holding bracket

With cam-cleat

Locking pin

Aluminium leg

610 mm or 970 mm


240 mm

Other accessories supplied :

1 low friction ring with its splicing rope

2 stainless steel fork to be fastened on the transom

1 bag of connectors

2 pre-assembled plugs and their cables

Technical characteristics

Output at 5 knots

Output at 5 knots 8 Amps in 12 Vcc (100 W) with the 240 mm propeller

10 Amps in 12 Vcc (120 W) with the optional 280 mm propeller

Maximum using speed

15 knots with the 240 mm propeller

20 knots with the optional 200 mm propeller

Compatible batteries

Lead battery


Other : contact us

Dimensions and weight


6,3 kg or 7,1 kg depending on the length


1,5 kg

Three-phases cable length

4 meters

Pre-assembled plugs with their cable

1 meter of cable


2D Drawings

Drilling template and bracket drawing

Installation Manual


Commercial flyer

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