French industrial energytech Epyr raised a €15 million (~$16.2M) Series A led by SlateVC, a follow-on round with existing investors AENU and Daphni doubling down alongside WEPA Ventures, OVNI Capital and Aurum Impact. The company has inaugurated its first installation in May 2026 at WEPA Group's paper mill in Troyes — France's first industrial thermal energy storage unit, built and commissioned in less than six months and now supplying up to 25% of the site's steam — and has been selected for a second 35 MWh unit at Papeco's Orval-sur-Sienne site that will replace 100% of the site's natural gas consumption as part of France's largest thermal storage project. Epyr said the funding will allow it to scale its Heat-as-a-Service solution — which uses smart controls to power electric resistors during low-cost hours to heat firebricks for on-demand high-temperature heat — and accelerate deployment across Europe.