HighPower ServoProp

Oceanvolt HIGHPOWER servoprop 25


The patented 48 V Oceanvolt HighPower ServoProp 25 (HPSP 25) featuring a controllable pitch propeller combines a high-efficiency saildrive with the most powerful hydrogenerator on the market. One of the unique features of the HighPower ServoProp is the capability of the propeller blades to rotate 360 degrees, allowing for ultimate efficiency in both propulsion and electricity generation.

Entirely designed and manufactured by Oceanvolt in Finland, this groundbreaking technology redefines the possibilities of sustainable yachting as the powerful hydrogeneration feature is capable of making the yacht energy self-sufficient. With the instant power and impressive thrust in both forward and reverse, it makes for excellent control of the boat even in harsh conditions.

The HPSP can also be installed with the propeller facing forwards or backwards. Mounting a saildrive leg with the propeller facing forwards increases the efficiency of both hydrogeneration, and also propulsion. Traditionally, saildrives are mounted with the propeller facing backwards, to allow for folding propellers and interior space management with large diesel engines. This however reduces the efficiency of the system.

The design of the propulsion unit is compact and highly integrated as the motor controller, propeller blade control, and complete liquid cooling system are built into the unit. In addition to being smaller and lighter than a comparable combustion system, there is no need for additional seawater inlets or outlets, reducing overall risk, drag and failure points.

Another advantage comes from not needing any exhaust system or fuel system, so with only a few cables to connect, planning and installing the system is straightforward and simple.

The HPSP 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 in substantially larger vessels.


The hydrogeneration or “creating energy while sailing” function is a standard, built-in feature in all Oceanvolt motors, and Oceanvolt motors boast the most superior hydrogeneration capability on the market.

This feature is activated from the Oceanvolt display. The system will switch to regeneration mode, displaying the generated power, RPM and time remaining until the batteries are fully charged.

The HighPower ServoProp is capable of generating:

  • 1 kW at 6 knots
  • 3 kW at 8 knots
  • 5 kW at 10 knots
Oceanvolt HighPower ServoProp 25 system.


  • The system is powered by a safe, low voltage (48 Vdc) battery pack so no high voltage is needed.
  • The drive can be installed with the propeller facing backwards or forwards, with no penalty to interior space
    • Forward facing propeller is recommended for most efficient hydrogeneration and propulsion
  • The saildrive and motor can be easily serviced and are very low maintenance
  • The motor, blade adjustment mechanism and oil can be checked and changed and the cooling circuit rinsed from inside the boat without having to lift the entire boat out of the water
  • The saildrive, flexible mounting and propeller are made out of composite
    • No need for separate anodes
  • Saildrive can be painted with effective antifouling paints such as Coppercoat
    • Made possible by the composite structure
  • Integrated rope cutter in the saildrive helps with fishing lines and other debris
  • In case of collision the saildrive does not cause a leak thanks to the fail safe/ break off -feature