"The top long-duration technology companies"23 Jun 2021 09:30
https://www.rechargenews.com/energy-transition/why-new-long-duration-energy-storage-technologies-will-soon-replace-lithium-ion-on-grid/2-1-1029091
Highview Power
Technology | Liquid-air energy storage
Levelised cost of storage (LCOS) | About $100/MWh for a 100MW system, with costs falling to $50/MWh by 2030
Storage output (at full capacity) | From three hours to days or weeks
Round-trip efficiency | 60%
First commercial projects | Highview completed a commercial 5MW/15MWh project in Manchester, northwest England, in 2019, and has begun construction of 50MW commercial projects in the US (400MWh) and the UK (250MWh). A further eight projects are expected to begin “execution” this year and next.
Financial backing | The UK-based company has secured more than $145m to date, with $70m raised in a funding round this year, which included a $46m investment from Japan’s Sumitomo Heavy Industries.
Hydrostor
Technology | Advanced compressed-air energy storage
LCOS | No figure provided but company claims if offers the lowest installed cost per MWh for large-scale long-duration energy storage
Storage output | Initial projects are ten hours, but this could be extended with larger storage spaces
Round-trip efficiency | 65%
First commercial projects | Hydrostor has announced two 500MW/5GWh projects in California to be completed in 2024-26. It completed a 1.75MW/pilot project in Ontario, Canada, in 2019.
Financial backing | Raised $37m in 2019 from investors who now sit on Hydrostor’s board.
Siemens Gamesa
Technology | Hot-rock thermal storage
LCOS | As low as €40 ($48) per MWh for its ETES Switch platform, which converts commercial fossil-fuel power plants into storage hubs. Standalone pilot plant LCOS is about €100/MWh.
Storage output | Theoretically unlimited, depends on the amount of basalt used, although the hot rocks lose about 0.5% of their stored heat energy each day.
Round-trip efficiency | 45-50% in 2019, with the aim of increasing this to 70% or higher
First commercial projects | A first system of up to 500MWh is due to be launched in 2022, part of a “vast” commercial pipeline. Siemens Gamesa’s 30MW/130MWh pilot has been running since 2019.
Financial backing | A profitable wind turbine company that is majority-owned by industrial giant Siemens.
Stiesdal A/S
Technology | Hot-rock thermal storage
LCOS: Less than €10/MWh once it is in serial production.
Storage output | Theoretically unlimited, depends on the amount of basalt used, although the hot rocks lose about 0.5% of their stored heat energy each day.
Round-trip efficiency | 55-60%
First commercial projects | A commercial demonstration project of 1MW/24MWh is due to be installed in Denmark in 2022.
Financial backing | Daniwsh pension fund PensionDanmark ploughed a “triple-digit million investment” into the start-up in May this year, giving it all the funds needed “to execute our ambitious growth plans over the coming
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