Cruising 300 Hydrogenerator

CRUISING 300 Hydrogenerator

  • An input of energy up to 300W (24 Amp 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)

    Mobile application : converter equipped with a Bluetooth chip allowing the reading of charge data, various technical informations, as well as the adjustment of voltages if necessary (Lithium battery)

    Available in 2 versions :

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

    Output 100 W from 5 knots
    Light : 6,3 kg
    Two years waranty
    Hydrodynamic Design

    Suggested retail price public
    3 170 €
    (excl VAT)


  • Packs characteristics :


    Nominal power 300 W


    Max output power 600 W

    12 Vcc or 24 Vcc autodetected

    Mobile application

    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 forks to be fastened on the transom

    1 bag with 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

    11 knots with the 240 mm propeller

    13 knots with the optional 200 mm propeller

    Compatible batteries

    Lead battery


    Other : contact us

    Dimensions and weight


    7,05 kg or 8,0 kg depending on the length


    1,4 kg

    Three-phases cable length

    4 meters

    Pre-assembled plugs with their cable

    1 meter of cable

  • Output power curves


    Speed in knots

    Which propeller to choose ?

    The propeller supplied in standard with the CRUISING 300 hydrogenerator pack is the 240 mm model which allows to produce 8 Amps at 5 knots.

    It is the more “universal” model guaranteeing the energy self-sufficiency on most boats with a negligible drag. To produce at slowest speed, the 280 mm diameter is more efficient.

    To produce at higher speed to minimize the drag effect, the 200 mm diameter is available as well as the 200 mm with manual variable pitch to be used on applications like MINI 6.50.

  • General Questions

    From what speed can I use the Watt&Sea hydrogenerator ?
    What is the drag generated by the hydrogenerator ?
    How can I choose the hydrogenerator configuration adapted to my boat?
    What maintenance is recommended for my hydrogenerator ?
    When shall I schedule a revision ?
    I wish to buy a Watt&Sea hydrogenerator, where can I find a reseller ?
    How long to be delivered with my all brand new hydrogenerator ?

    Mechanical installation

    What strength is generated by the hydrogenerator while sailing ?
    Can I install my Watt&sea hydrogenerator by myself ?
    Can I paint the hydrogenerator same color of my boat ?
    Is there any fuse system if my hydrogenerator is subject to a collision with an UFO during navigation?
    The transom on my boat is not vertical, can I install an hydrogenerator ?
    Can I let the hydrogenerator down while reversing ?

    Eletrical Installation

    Do I have to put a fuse on the electrical installation of my hydrogenerator ?
    How much time will the Watt&Sea hydrogenerator take to fully load the batteries ?
    My cable from the hydrogenerator to the converter is longer than recommanded in the manual. What are the consequences ?
    What kind of solar panels can I connect to the Watt&Sea converter ?
    The cable wires going out from the hydrogenerator are not numbered. How can the order of the connection be right ?
    Can I connect a 12V battery and a 24V battery at the same time on the converter ?
    Can I use Lithium-Ion batteries with the Watt&Sea converter ?
    Is it possible to load several banks ?
    Can I stop the energy production without lifting the hydrogenerator up ?
    Can I use the Watt&Sea hydrogenerator simultaneously with the engine ? (engine alternator load at the same time with the hydrogenerator’s one)
    Can I let the hydrogenerator in the water when the batteries are fully loaded ?
    Does the hydrogenerator convert alternating current to direct current, to load the batteries ?
    Why should the converter be mounted vertically ?
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