Carnot Engines

Carnot Engines

London, United Kingdom

HydrogenBiogasOther
Profile last updated: April 28, 2026

About

Carnot Engines is a renewable energy company headquartered in London, United Kingdom specializing in Hydrogen, Biogas, Other.

Carnot Engines is a UK-based engineering start-up developing high-efficiency, multi-fuel engine technology to reduce the cost and emissions of heavy-duty power. Its engine architecture uses high-temperature materials and eliminates cooling systems to reduce thermal losses, targeting 68-72% brake thermal efficiency. The engines can run on hydrogen, ammonia, methanol, biofuels, biogas, LPG, LNG, HVO and diesel, and can be upgraded between fuels. Target markets include marine auxiliary power, heavy-duty vehicles and off-grid power. The company is based in Milton Keynes and has a London office.

Headquarters

London, United Kingdom

Focus areas

high efficiency enginemulti-fuel enginefuel agnostichydrogen enginemarine decarbonisationcold ironingheavy-duty poweroff-grid powerLPG engineammonia enginenet zero

Products & services

Business models

B2B

Value chain

R&DManufacturingEngineeringDevelopment

Locations

Headquarters

Great Western Studios, 65 Alfred Road, W2 5EU, London, United Kingdom

Projects

5

Hydrogen cold ironing solution

PlannedHydrogen auxiliary power for shore-to-ship power

Consortium project led by Carnot to decarbonise port emissions by supplying hydrogen-powered shore-to-ship power to replace diesel generators during cold ironing, funded by a 3m grant.

United KingdomClient: Freeport East

Carisbrooke Hydrogen Auxiliary Engine Project

PlannedHydrogen auxiliary power unit

Deployment of the UK's first hydrogen auxiliary power unit onboard a Carisbrooke Shipping cargo vessel, with Bureau Veritas and the Maritime and Coastguard Agency.

United KingdomClient: Carisbrooke Shipping

Maritime Auxiliary Power Unit with MOL

Under ConstructionMaritime auxiliary power unit

Co-development of a maritime auxiliary power unit optimised for the MOL fleet, using fuel-agnostic engine technology for ammonia, methanol and LNG.

Client: Mitsui O.S.K. Lines

Hydrogen Engine Sea Trials

PlannedHydrogen marine engine

UK hydrogen engine sea trials funded by a 2.3m grant.

United Kingdom

Off-grid biofuel generators

PlannedBiofuel generator

Development of off-grid biofuel generators funded by a 1.5m Energy Catalyst 9 grant.

United Kingdom

Credentials & affiliations

Awards

RISE Award

RISE AwardsGreen Transport

Industry memberships

Getting to Zero Coalition

Partnerships

Brunel University London, Petredec, Mitsui O.S.K. Lines, Carisbrooke Shipping, Bureau Veritas, Maritime and Coastguard Agency, Freeport East, Harwich Haven Authority, Oz Minerals, The Manufacturing Technology Centre, Net Zero Technology Centre

People

Management & team (4)

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