Pack composition
Hydrogenerator | Nominal power 600 W |
Converter | Max output power 600 W 12 Vcc or 24 Vcc autodetected 48 Vcc in option Input for solar panel 7,5-50 Vcc / 14 Amps |
Hydraulic box | Led indication for pressure Pump with brushless engine |
Holding bracket | Anodized aluminium black flanges With cam cleat Locking pin Thermo-coated aluminium leg 610 mm Variable pitch composite propeller 200 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 1 quick couple hydraulic |
Technical characteristics
Output at 10 knots | 24 Amps in 12 Vcc (300 W) with the maximum adjustment 3,5 Amps in 12 Vcc (40 W) with the minimum adjustment |
Maximum using speed : | 30 knots with the minimum adjustment |
Compatible batteries | Lead battery Lithium Other : contact us |
Dimensions and weight
Hydrogenerator | 8,6 kg |
Converter | 1,5 kg |
Hydraulic box | 1.0 kg |
Three-phases cable | 4 meters length |
Pre-assembled plugs with their cable | 1 meter length |
Watt Speed in knots
The automatically controlled pitch propeller allows to use the hydrogenerator in a large range of speeds from 5 to 30 knots with a minimal drag.
One press on a switch-on and the pump allows the blades to move to the feathered position. The drag and efforts are reduced, facilitating immersion operation, even at high speeds.
For specific performances, we can design custom blades.
The patented and award winning Oceanvolt ServoProp saildrive now offers the most powerful hydrogeneration of any electric motor on the market with the new HighPower ServoProp 25.
Hydrogeneration – also referred to as regeneration or regen – is the unique ability of electric motors to generate electricity and recharge the battery as the boat moves through the water. Not all electric motors have this capability, those that do are used on sailboats – the hydrogeneration happens when the boat is sailing under wind power.
Oceanvolt is recognized as one of the leaders and pioneers in hydrogenerating motors, with their original ServoProp innovation winning the DAME Design Awards at METSTRADE in 2016. The Oceanvolt ServoProp has since been adopted by hundreds of high profile yachts around the world.
The big innovation of the ServoProp is in their propellers. Their combination of controllable pitch with the ability to rotate 360 degrees enable ultimate efficiency in both propulsion and electricity generation. This gives a significant advantage over traditional folding prop setups.
As you can see from the chart, the new HighPower ServoProp 25 can generate 5kW of power at a speed of 10 knots – which is two and a half times the amount generated by the ServoProp 15 kW motor at the same speed. The company says future remote software updates are expected to increase the yield and efficiency of the regeneration. (The third line on the chart is the generation ability of the Oceanvolt SD15 which has a 15kW motor but with standard folding propellers.)
First electric propulsion X-Yacht powered by Oceanvolt
This regen feature is activated from the Oceanvolt display in the cockpit. With the touch of a button the system switches to regeneration mode, displaying the generated power, RPM and time remaining until the batteries are fully charged.
Saildrives are traditionally mounted with the propeller facing backwards because they have to allow space for folding propellers and large diesel engines. The compact electric HPSP has the flexibility to be installed with the propeller facing forwards or backwards. Oceanvolt recommends mounting the leg (lower unit) of the HPSP with the propeller forward to achieve maximum efficiency of both hydrogeneration and propulsion.
Compared to a fossil fuel combustion motor, the HPSP has other benefits beyond the lack of carbon emissions and noxious fumes. The motor controller, propeller blade control, and complete liquid cooling are built into the Oceanvolt unit so it can be installed with only a few cables to connect.
There are no exhaust or fuel systems to install or accommodate and overall risk, drag and failure points are reduced because there is no need for additional seawater inlets or outlets.
The nominal power of the HPSP is 25 kW, with peak power of 30kW for periods up to 15 minutes. Oceanvolt says the ICE equivalent is 75 horsepower, but the electric motor provides superior instant torque and with nearly 5000 newton static thrust in both forward and reverse, it makes for excellent control of the boat even in harsh conditions.
All Oceanvolt systems are safe 48 Volts, including their modular AXC inboard motors and SD saildrives with standard props.
The company recently completed an oversubscribed crowdfunding round of €1.46M and noted at the time that the HighPower ServoProp would be an investment priority, along with expanding the dealer network.
Deliveries for the HSPS-25 start in the fourth quarter of 2023. The motor is suitable as a propulsion motor for boats up to 70 ft in length and weighing up to 25 tons. It can also be used as a hydrogenerator alone in substantially larger vessels. The first vessel to feature the HPSP will be the X-Yachts Xc 47 launching in 2024.
Peak power | 30 kW (15 min) |
Nominal power | 25 kW |
Equivalent HP | 75 HP |
Propeller diameter | 23 inches / .58m |
Weight (motor, saildrive and propeller) | 190 kg / |
Unit dimensions (incl. motor and saildrive) | H: 1101 mm /43.3″ • W: 400 / 15.75″ mm • D: 853 mm / 33.6″ |
Boat Length | up to 21 m (70 ft) |
Boat Weight | up to 25 000 kg (27.5 US Tons) |
Cooling | Liquid |
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£ 2,531.74 Ex VAT
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Producing electricity on passage is a major consideration for the cruising yachtsman. With on-board refrigeration, autopilot, radar and other electrical equipment, power consumption when underway can be 200 amp-hours per day or more. The Sail-Gen generates electricity as you sail and is easily capable of matching or exceeding the average yacht’s power requirements.
The Sail-Gen comprises a rigid welded aluminium frame with a carbon fibre driveshaft and cast alloy alternator housing and water impeller. The Sail-Gen is easy to install, compact in size, reliable and efficient in operation.
(From £ 4,083.90 Inc. VAT)
(From £ 2,058.00 Inc. VAT)
Jonathan Neeves
A few years ago, I noticed that 2 of the 10 cruising boats I saw docked in Bergen, Norway, had towed water generators, making me wonder whether the Scandinavians have had better luck with these devices than we have. In the October 2017 issue of Practical Sailor, offshore gurus John Neal and Amanda Swan Neal of Mahina Tiare Expeditions share their experience with these systems.
It has been a long time since Practical Sailor tested towed water generators, and the number of choices remains extremely limited. The last towed water generator we reviewed was the Hamilton-Ferris towed water generator . And the last long-term test was of the Aqua4Aeroben made by LVM in the United Kingdom.
The units I saw in Bergen looked like they were the Aquair 100 made by the British manufacturer Ampair. In our article on Choosing a Wind Generator , we mention Ampair, and we describe its wind generator in greater detail our marine wind generator test (available only to subscribers). We have not yet had a chance to test the Aquair 100, but it operates in a similar way to the Hamilton Ferris unit. Both tow a small impeller that looks-and this is one of the problems-like a big fishing lure with propeller blades. As the impeller spins, it turns the generator fixed to the boats stern. Old-timers may remember how much the fish seemed to like those pricey impellers for the Walker Knot Log , even though they were painted black.
One thing I noticed in Bergen was that one of the towed water generators had what looked to be a homemade impeller, and it is quite probable that the original one was lost. This is one of several problems with towed water generators; they get tangled, fouled in weed, snagged, and lost-sometimes eaten by big fish or sharks. I suppose one reason there might be more of these units here in the north country is the waters don’t have as many surface-feeding pelagic species as we have in warmer climates.
Towing isn’t the only option, though. While I was in South Africa a few years ago, I spoke with the local representative for Duogen to try to arrange a test of this product, a combination wind and water generator. At the time, the company was fairly early in the product development, and I was not impressed with the fabrication. One thing I did like was the apparent ease (the key word is apparent, because I did not try this at sea) with which the Duogen deployed: It is suspended over the stern like an electric outboard. In its water-gen mode, it looked very similar to the Watt & Sea hydrogenerators that Practical Sailor contributor Dan Dickison examined during the Velux 5 Ocean Race. These are now available in a cruising version , but they are expensive units, and again we have not tested them.
All of these products have another problem in that they add drag underway. Some owners report speed losses of a quarter- to a half-knot. This isn’t a big deal if they can help keep the ships systems running on a long passage of the kind that John and Amanda routinely tackle on their offshore training sails aboard their Hallberg Rassy 46, Mahina Tiare III .
Call me a skeptic, but when I look at the prices for hydrogenerators and consider how much time they will actually be delivering power to the boat, I think there are much better ways to spend my money. If an efficient and convenient dual-purpose generator comes on the market, I may change my tune. But right now, I think solar, then wind still reign in the world of ship-board alternative energy.
On watch: this 60-year-old hinckley pilot 35 is also a working girl, leave a reply cancel reply.
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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 ...
Hydrogeneration is the most efficient form of sustainable auxiliary energy for yachts. The Watt&Sea is the most flexible in this respect. Its two models (300W and 600W maximum output) can be equipped with a 240mm diameter impeller or a 280mm unit. The difference in output is striking: at five knots boat speed, the smaller one produces 100W ...
It can also be used as a hydro generator in boats up to 100 ft. Videos of hydro generation. power created by hydro generation. Oceanvolt systems are optimised for either 2 or 3 blade Flexofold folding propellers & Gori propellers. Other folding propellers can also be used but they provide 30-50% less propulsion and regeneration power.
Up to 600W of hydroelectric energy production! The Cruising 600 is ideal for sailing boats over 35 feet. Available in two lengths to optimize the immersion of the propeller. Output power of the hydrogenerator increases exponentially when travelling over 6 knots, and operates best within 3 to 20 knots. Outputs 120W from 5 knots.
A hydro-generator is an effective way to provide constant electrical charge over a long distance. On a 40ft yacht one of these can produce around 200Ah of charge every 24 hours at 6kt, which is enough to run most electrical items on board. They also require little maintenance, other than weed clearance and periodic checking of the electrical ...
As Sabrina Huet of Watt & Sea points out, hydro-generators are popular, "for the silence, the high production of (green) energy on fast boats and the possibility to get energy during the night, cloudy days and even when going downwind.". Looking at the power curve for the company's cruising unit, 5 knots of boat speed will produce around ...
The propeller supplied in standard with the CRUISING 300 hydrogenerator pack is the 240 mm model which allows to produce. 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 ...
Efficient Generator-Based Electrical Systems For Yachts; Battery Bank Size and Generator Run Time, A Case Study; ... What saved us was the little hydro generator making 6 amps per hour, 24 HOURS PER DAY, every day that we could sail. If I had purchased the 600 watt version, we probably could have used our water maker a few times and kept both ...
from £108.00. Sold Out. Remoran Spare Turbine. £93.74. The Remoran Wave 3GD allows you to generate up to 300W of power without emitting any emissions as you sail your yacht. The Remoran range of marine hydrogenerators are supplied as a complete package ready for installation.
Remoran Charger 300W. Our custom intelligent charger is designed to work perfectly together with our generator. The charger is an essential part of an optimally working Remoran Wave 3 installation. It is always included in our sales package. Converts 3-phase AC electricity from the generator to DC voltage suitable for batteries.
10 Reasons to choose Watt&Sea. High electric output - 24 Amps at 7.5 knots of boat speed. Negligible drag because of leg and blade shape. A source of free green power. No need to run the engine to charge: saving in fuel consumption. Completely quiet. Lightweight. Easy to install, especially with the Hydrovane bracket. Maintenance-free.
Watt and Sea Hydrogenerator. In this video, you can watch one of the popular Watt and Sea units being towed behind a fairly modest sailboat. At 8 knots of boat speed in 14 knots of wind, the unit is putting out an impressive 16 amps of power. Price depends on which unit you choose, but expect to pay around $3,000 for a complete system.
Range, beyond battery capacity, is extended through hydro generation while sailing above 6kn. This can be complemented with either a portable AC generator or a DC generator (in larger boats or for long distance cruising). All Oceanvolt systems are engineered to operate at 48 volts for passenger safety and ease of repair.
Watt & Sea Hydro Generator Review. 'Wattsson', a Watt & Sea 600 watt hydro generator, has become part of the Isbjorn (our Swan 48) family. He joins 'R2-D2', our autopilot, as simultaneously our most and least favourite pieces of gear on the boat. We sail Isbjorn 10,000 miles a year, and Wattsson happily hums along, day and night ...
The hydrogenerator POD 600 is THE innovating solution for sailing boats unable to fastened an hydrogenerator on their transom for technical, mechanical and aesthetic reasons. Tested since 2014 by a few privileged sailors, this version has been able to demonstrate those useful advantages : electrical output is the same compared to classic models.
If a boat were anchored in a strong enough current with the towed generator behind, it could generate power. In this way, homesteaders living "off the grid" can make use of waterpowered generators if they live next to a fast-moving stream. For more information on hydro generators, purchase Marine Electrical Systems, Vol. 4: Alternative Energy.
East Coast Sales Office & Headquarters [email protected]. Phone: 954-581-2505 Fax: 954-337-2287 2821 SW 23rd Terrace #3 Fort Lauderdale, Florida 33312. Service Center
The hydrogenerator Save Marine reloads the batteries of your sailboat and brings electrical autonomy in order to ensure security and comfort on board. The electricity produced by the hydrogenerator is transmitted to batteries through the regulator to get an optimized current/voltage pair for batteries. The Save Marine H240 hydrogenerator is ...
The Racing Aluminium hydrogenerator is designed for high or very high speed sailing boats. It is equipped with a controlled pitch propeller, functionning electronically with an hydraulic pump. The propeller pitch is setting automatically depending on the boat speed, ensuring a minimal drag and an optimal energy output. This model is functional ...
Deliveries for the HSPS-25 start in the fourth quarter of 2023. The motor is suitable as a propulsion motor for boats up to 70 ft in length and weighing up to 25 tons. It can also be used as a hydrogenerator alone in substantially larger vessels. The first vessel to feature the HPSP will be the X-Yachts Xc 47 launching in 2024. Oceanvolt
The Sail-Gen comprises a rigid welded aluminium frame with a carbon fibre driveshaft and cast alloy alternator housing and water impeller. The Sail-Gen is easy to install, compact in size, reliable and efficient in operation. The Sail-Gen generates approximately 230 amp-hours per day at 6 knots, rising to 500 amp-. hours at 8 knots.
It has been a long time since Practical Sailor tested towed water generators, and the number of choices remains extremely limited. The last towed water generator we reviewed was the Hamilton-Ferris towed water generator.And the last long-term test was of the Aqua4Aeroben made by LVM in the United Kingdom.. The units I saw in Bergen looked like they were the Aquair 100 made by the British ...
Hydro Generators For Boats. Watt & Sea's superb hydro generators are some of the most powerful, lightweight and reliable hydro generators available. Hydro generators have an impeller that rotates when dragged through the water behind the boat. This rotation is applied to an alternator that produces AC power, that then produces a DC charge for ...