Countdown to Southampton Boat Show 2021: Hardy 42 Hybrid


Cockwells plucked Hardy from the ashes last year and will have the first in a new generation of Hardys on display at this year’s Southampton Boat Show.

The boat is a timeless well-proven model, around 30 of which have been built over the past 18 years, but Cockwells hasn’t hesitated in ringing the changes, the most interesting of which is the hybrid propulsion system.

The hybrid installation is based around a single 440hp Yanmar diesel engine, rather than the usual twin set-up, with a 20kW electric motor linked to a 22kW generator and a 48V 400AH lithium-ion battery bank providing an additional source of clean, quiet power for the single shaft and propeller.

The generator either runs the electric motor directly or charges the batteries, but a 48V alternator also allows charging directly from the main engine.

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Under diesel power it has a top speed of 15-16 knots, depending on load condition, but at an economical cruise speed of around eight knots it should deliver a range of around 600nm from its 2,000 litres of diesel spread across two tanks.

In electric mode the maximum speed will be just six knots, but the batteries won’t last long at this pace. At a more sedate 4.8 knot cruise, a draw of around 200A allows up to two hours’ silent running.

EmpirBus-based, the system will handle everything automatically so when battery levels drop to 20% the generator fires up to run the electric motor.

Cockwells is known for the high quality of its handcrafted wooden interiors and the Hardy 42 Hybrid lives up to expectations. It features contemporary light-oak veneers with a satin varnish finish.

This first boat has a two-cabin, two-bathroom layout with the owners’ suite amidships and the VIP suite forward.

Hardy 42 Hybrid specifications

LOA: 45ft 9in (14m)
Beam: 14ft 1in (4.3m)
Engines: Single 440hp Yanmar diesel/20kW electric motor
Top speed: 16 knots
Starting price: £954,000 (inc. VAT)


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