Severn Trent unlocks £670k revenue while boosting resilience and sustainability with energy flexibility

Severn Trent Water, one of the UK’s largest water and wastewater utilities, partnered with Enel X to explore how demand-side response could deliver new revenue and operational benefits without disrupting critical infrastructure. Over three years, the collaboration has delivered more than £670,000 in Capacity Market revenue, helping to fund resilience upgrades, offset energy costs, and support the company’s ambitious sustainability targets.

Electricity accounts for around 10% of operating costs for UK water companies, with pumping being a major driver. Severn Trent wanted to find new ways to reduce OPEX, explore operational flexibility, and strengthen resilience - all while meeting strict service continuity requirements as a regulated operator of critical national infrastructure.

Enel X worked closely with Severn Trent to identify suitable sites, conduct technical feasibility assessments, and enrol 5 MW of capacity across seven sites in the Capacity Market. By carefully aligning event windows with operational constraints, Severn Trent could participate without affecting core services.

 

“Enel X simplified the pre-enrolment process, supporting us with feasibility assessments and proven modelling tools to forecast potential value and define viable demand-response windows.”

— Helen Ewing, Energy Analyst, Severn Trent Water

• £670,000 in revenue from Capacity Market participation
• New revenue stream helped fund power resilience upgrades
• Demonstrated the resilience of its energy systems
• Advanced Severn Trent’s triple carbon pledge: carbon zero, 100% renewable power, all-electric fleet by 2030

Following the success of this long-term partnership, Severn Trent plans to expand participation to more of its ~7,000 sites, explore wholesale market opportunities, and increase automation to further streamline flexibility delivery.

 

Download the Full Case Study and Contact Us Today.