FAQ

 

Hydrogenerator Cruising

Why the converter must be mounted vertically?

The installation of  the converter vertically ensures good natural ventilation for cooling the converter: the hot air going from the bottom up, it better flows along the fins of the aluminum case when installed vertically for better evacuation of release internal heat. Installed horizontally, the converter can heat up more, and thus be damaged.

Can I use the device while I run my boat main engine ?

The system in not designed to replace the alternator of your engine. It can nevertheless be used while operating your main engine, though the output may be lower because of the engine propeller turbulences.

What should I do with the hydro generator in the harbor ?

You may either leave the device on the transom in upper lift position, or store it away in your cockpit locker if you own a portable model. If not lifted, it is necessary to have “limiting” lines to prevent the cradle and blade from backing against the transom causing damage. However it is highly recommended to simply raise the device.

Is there a risk to damage the batteries ?

Hydro generators are delivered with converters having a function of regulator of the level of voltage of the batteries.  If you have special batteries we can set the output for you before shipping.

With which type of batteries the system does function ?

The system is compatible with any type of batteries: lead (acid or gel), lithium etc…

What happens in case of impact ?

The lifting system allows inserting a fuse that will release the device in case of impact. However, risk of direct impact on the device is minimal given its position on the transom, behind the keel, centerboard, and rudder.

What happens when the batteries are charged ?

The electronic regulator automatically charges the batteries. When the batteries are fully charged, the propeller switches to "freewheel" which diminishes the drag.

What speed loss is to be expected ?

We currently don't have any reliable data on the effective drag of the device, or about the speed loss it generates. Our immersion and lifting trials at constant speed have not shown any substantial difference on the speedometer.

What power output can I expect ?

The power generated increases at the cube of the speed (V3). At 5 knots, the output power is about 120W (or about 10A on a 12V battery raw) with the 280mm propeller. At 8 knots, the system produces 4 times more power, i.e. 480W (about 40A on a 12V battery raw). These figures are instantaneous measurements and averages might be different according to the condition at sea.

To reload a park of 12V batteries of 200 ah to 50% of its capacity, on average 10 hours at 5 knots and 3 hours at 8 knots will be necessary.

Can I replace the propeller ?

Replacing the propeller is simple and only requires an Allen wrench and an extractor screw.

How should I maintain the device ?

Except for cleansing the exterior body, the device does not require any specific maintenance.

What is the anti-corrosion treatment ?

The aluminum parts are anodized, and coated with paint. They are also electrically insulated from the other metallic parts to prevent electrolytic corrosion.

How reliable is the system ?

The hydro generator has been designed for offshore races and benefits from the latest technology for its reliability. Metallic parts are made either in specially treated aluminum or in stainless steel A4.
The best sealing is obtained with a hi-tech ceramic-carbon gasket used in industry. These gaskets have a lifetime of several thousands of hours and will painlessly support a circumnavigation.
The body is filled in with lubricating oil slightly pressured to prevent any water seepage.
In addition, the alternator is factory immersed in a resin that encapsulates electrical conductors.
Should dampness occur the electric parts would not be damaged.
 

 

Hydrogenerator Racing

Why the converter must be mounted vertically?

The installation of  the converter vertically ensures good natural ventilation for cooling the converter: the hot air going from the bottom up, it better flows along the fins of the aluminum case when installed vertically for better evacuation of release internal heat. Installed horizontally, the converter can heat up more, and thus be damaged.

Can I use the device while I run my boat main engine ?

The system in not designed to replace the alternator of your engine. It can nevertheless be used while operating your main engine, though the output may be lower because of the engine propeller turbulences.

What should I do with the hydro generator in the harbor ?

You may either leave the device on the transom in upper lift position, or store it away in your cockpit locker if you own a portable model. If not lifted, it is necessary to have “limiting” lines to prevent the cradle and blade from backing against the transom causing damage. However it is highly recommended to simply raise the device.

Is there a risk to damage the batteries ?

Hydro generators are delivered with converters having a function of regulator of the level of voltage of the batteries.  If you have special batteries we can set the output for you before shipping.

With which type of batteries the system does function ?

The system is compatible with any type of batteries: lead (acid or gel), lithium etc…

What happens in case of impact ?

The lifting system allows inserting a fuse that will release the device in case of impact. However, risk of direct impact on the device is minimal given its position on the transom, behind the keel, centerboard, and rudder.

What speed loss is to be expected ?

We currently don't have any reliable data on the effective drag of the device, or about the speed loss it generates. Our immersion and lifting trials at constant speed have not shown any substantial difference on the speedometer

What happens when the batteries are charged ?

The electronic regulator automatically charges the batteries on their good level. When they are full, the incidence of the blades decreases thus reducing the drag. From this moment, the system maintains the charge of the batteries while suppling your electrical loads.

What power output can I expect?

The power generated increases at the cube of the speed (V3). At 7 knots, the output power is about 120W (or about 10A on a 12V battery raw). At 11 knots, the system produces 4 times more power, i.e. 480W (about 40A on a 12V battery raw). These figures are instantaneous measurements and averages might be different according to the condition at sea.