GGreendur Technologies
Greendur Technologies is a Navarre-based deeptech startup founded in 2020 that develops thermal energy storage systems ("thermal batteries") based on latent-heat phase-change materials to decarbonise industrial process heat. Its systems charge from renewable electricity, grid off-peak power or waste heat and deliver clean steam and heat up to ~350 °C, targeting efficiency above 90% and cuts in Scope 1 emissions and energy costs. After four years incubating at CEIN it moved in 2025-26 to a 600 m² facility in the Areta industrial park in Huarte (Navarra) and plans European expansion into France, Germany, Poland and Italy.
SectorsEnergy & Climate, Deeptech & Hardware, Industrial decarbonisation, Thermal energy storage, Cleantech
Start-up MapEnergy & Climate › Batteries & EV charging
Founders
J
Jesús Castillo Yera
Founder & CEO
Global models 5
AAntora Energy
United States · antoraenergy.com ↗
Thermal batteries that charge on cheap renewable electricity and deliver zero-carbon heat and power to industrial sites.
~$330MComparable
RRondo Energy
United States · rondo.com ↗
Heat batteries that store off-peak renewable power and supply steam and high-temperature heat to decarbonise industrial processes.
~$130MComparable
BBrenmiller Energy
Israel · bren-energy.com ↗
Thermal storage systems that turn electricity or waste heat into steam for industrial customers, cutting fuel use and Scope 1 emissions.
~$60MComparable
EElectrified Thermal Solutions
United States · www.electrifiedthermal.com ↗
Firebrick thermal batteries that store electricity as heat to supply high-temperature industrial process heat.
~$50MComparable
KKraftblock
Germany · kraftblock.com ↗
Thermal storage that captures waste heat or renewable power and delivers process heat and steam to industry.
~$25MComparable
In the same niche 27 others
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Notes: Most funded first
Investors 5
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Funding rounds 1
| Date | Round | Amount | Lead |
|---|---|---|---|
| 2022-02-16 | Pre-seed (estimated) | €227K | Sodena |
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