Oceanvolt SD10 electric saildrive motor and leg

Overview

Oceanvolt's SD10 is a 10 kW, 48 V electric saildrive for sailboats up to about 13 metres and 9,000 kg, with regeneration under sail.

Year

2025

Boat Type

Other

Propulsion

Electric Inboard

Location

Finland

About the SD10 Saildrive

The SD10 is Oceanvolt's 10 kW saildrive for monohulls and multihulls up to about 13 metres and 9,000 kg. The motor, electronics and saildrive leg weigh 46.5 kg and turn the propeller shaft at a rated 1,140 rpm. Oceanvolt designs the SD range around folding propellers and offers mounting that can fit existing Volvo Penta and Yanmar saildrive beds, making the SD10 relevant to diesel-replacement projects. It operates at 48 V and connects to Oceanvolt's broader system of propulsion batteries, shore charger, solar input, display and controls. Liquid cooling is used on the current SD10 specification. The drive can recover energy while the boat is sailing, but the regeneration rate depends on boat speed and propeller setup. Battery capacity is selected for the vessel rather than fixed by the motor, so installation weight and motoring endurance vary by project.

Best For

Sailboats up to about 13 metres and 9,000 kg
Diesel saildrive replacement projects
Cruising boats combining shore, solar and hydrogeneration inputs

Performance in Context

The SD10 provides 10 kW continuously and at peak; Oceanvolt describes it as equivalent to a roughly 20 hp installation rather than a direct horsepower conversion. Boat speed and motoring range depend on displacement, waterline, propeller, battery energy and conditions. Hydrogeneration can extend endurance and support house loads, but it does not make range literally unlimited. A system design should model both motoring demand and the sailing speeds at which useful regeneration occurs.

Battery and Charging

Oceanvolt configures the SD10 with a 48 V propulsion battery bank sized for the vessel. Shore charging, solar and an optional generator can be integrated with regeneration from the saildrive. Existing installations cited by Oceanvolt use battery banks from roughly 8 kWh upward, but that is not a universal standard capacity. Charging time and motoring endurance must be calculated from the chosen usable energy and onboard charging equipment.

Availability and Pricing

The SD10 is configured and sold through Oceanvolt and its installer network. Pricing depends on the battery bank, charger, display, control lever, mounting work and optional generation sources. A conversion quote should include removal of the diesel system, structural fit, cooling and commissioning rather than treating the saildrive price as the complete project cost.