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CompoSea CS21

CompoSea · Electric · luxury

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The CompoSea CS21 is an electric sport boat from CompoSea, Sweden. It measures 6.5 m, rated for 6. It runs on 100 kW and a 80 kWh battery. Top speed 30 knots.

Specifications

Length
6.5 m
Passenger capacity
6
Battery
80 kWh
Motor power
100 kW
Top speed
30 knots
Range
25 nm

Powertrain options

  • Motor/battery details not disclosed

    Power
    100 kW
    Battery
    80 kWh
    Top speed
    30 kn
    Range
    25 nm

    The built, launched all-electric configuration (also SC21 / CS21 eTech): 100 kW PMSM motor on an 80 kWh pack, 30 kn top speed, ~25 nm at a 17-18 kn cruise and up to ~90 nm at displacement speed. Carbon-fibre hull built in-house, seating ~6. The eTech range page lists configurable 40-105 kW / 40-90 kWh options; the figures here are the launched boat. Beam, draft, weight, price and CE not published.

Our take

What a buyer should know

A launched carbon electric day boat

The CompoSea CS21 is a 6.5 m all-electric day boat from the Swedish carbon-composite builder CompoSea, near Uppsala — a light, fast boat that has been launched and water-tested, from a yard whose founder designed craft for the Swedish Navy and Coast Guard.

The numbers

A 100 kW motor on an 80 kWh battery drives the carbon hull to 30 knots, cruises at 17, and covers about 25 nautical miles at that pace — stretching to roughly 90 at a gentle displacement speed. The eTech range page offers the motor and battery as options, from 40 to 105 kW and 40 to 90 kWh; the figures here are the boat as launched. Beam, draft, weight, price and CE category are not published. Seating is for about 6.

The builder

CompoSea builds carbon-composite performance boats near Uppsala, in Sweden. The CS21 is its launched all-electric boat; the hybrid "eBoost" models are still to come.

Written from the builder’s published specifications and the wider market, not from testing the boat ourselves. Always confirm figures with the manufacturer before committing.

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