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Affordable, compressed air and thermal energy storage at half the cost of lithium-ion

October 2021
Gallery eTanker 1
Gallery eTanker 1


Cheesecake Energy’s eTanker is a stationary, medium-long-duration energy storage solution which delivers cheap, reliable, efficient energy storage in a modular, containerised package. ​ The technology stores energy in the form of heat and pressurised air, adapting ex-service truck engines with our patented modifications to become zero-emission electrical power-conversion machines for putting energy into storage and recovering it from storage. Our proprietary system architecture unlocks low-cost performance in a compact footprint that represents a step change in compressed air energy storage capabilities.​ The system is safe, straightforward to operate, has a lifetime of up to 25 years and can deliver turnaround efficiencies of 65-70%. ​​​ eTanker can discharge at full power for up to 20 hours at 30-40% lower cost than lithium-ion batteries and can be deployed flexibly as power and energy are scaled separately from one another.

Label Date October 19, 2021
From United Kingdom
Maturity stage Prototype testing 1:1 in the lab
Looking For Network, New clients, Visibility, Funding, Partners, Credibility

The environmental benefits

  • Can be cycled10,000 times with negligible degradation
  • Can operate in a wider range of operating environments from -20ºC to +50ºC (-4 °F to +122 °F) compared to lithium-ion systems which are are efficient from 0 °C to +40 °C (32 °F to +104 °F)
  • 70% turnaround efficiency
  • At the end of its 25 year lifetime, 99% of CEL eTanker can be fully recycled

The Financial benefits

  • Up to 40% cheaper than lithium-ion batteries
  • Less than 7 year payback and as little as 3 years in some key markets
  • Targeting a €270/kWh total installed price (150kW-30MW, 8 hour duration)

Activity Region

  • /


United Kingdom,

  • Headquarters
  • Activity

Company Profile

Cheesecake Energy

CEL's eTanker system uses compressed air & thermal storage to achieve costs 30-40% lower than lithium-ion batteries

View company profile Solution website
Headquarters Lenton, Nottingham NG7 2GT, UK

Networking Partner


InnoEnergy supports and invests in innovation at every stage of the journey – from classroom to end-customer.

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Solutions Associated 45


“Greenbackers is all about catalyzing the investment needed to build a more sustainable society. By connecting disruptive technology providers to our network of climate focused investors, we’d like to think we’re helping to save the planet – deal by deal” Robert Hokin, Founder and Managing Partner

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Solutions Associated 9
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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Cheesecake Energy has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.