France's first electrified thermal energy storage unit
Electrifying heat at competitive cost
The unit charges when power prices are low, and it offers the grid a new flexibility resource through French TSO's reserve markets, protecting industrial competitiveness while strengthening energy sovereignty.
From concept to commissioning in six months
Designed, built and commissioned in under six months, the unit supplies up to a quarter of the steam demand at WEPA's Troyes mill under a long-term heat offtake agreement.
Side by side with WEPA
Fast to deploy, seamless for site operations and free of capex, our approach earned the early trust of WEPA, which has backed Epyr since 2024 and opened its Troyes site to the technology.
< 6
months from concept to commissioning
Up to 1/4
of the site's steam needs, after three months of operation
0
disruption to production
"
The reason we turned to Epyr's solution was its promise of fast, seamless decarbonisation for site operations. Today, that promise has been kept: in under six months, with zero disruption to our production, the installation is fully operational and helps us to implement our decarbonisation strategy.
François Roposte
Mill Manager of the WEPA site in France
in the media
news, Stories & Press Coverage
Media
“The initial results are very good!” In Troyes, the toilet paper factory generates heat...
Le Parisien
4 June 2026
Media
A first in France: Epyr launches an electricity storage system using industrial heat
L'Est éclair
1 June 2026
This project was funded by the French government as part of the France 2030 program, operated by ADEME.
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