E.ON Next has initiated an innovative trial to illustrate the potential of simultaneously achieving lower energy bills, enhanced grid flexibility, and accelerated renewable energy growth.
Building on the outcomes of E.ON’s original Coventry battery pilot in 2024, this second phase involves equipping up to 100 homes with batteries. The aim is to demonstrate how demand flexibility can reduce household energy costs while alleviating grid pressure and fostering renewable energy expansion.
“This trial shows that lower bills, grid flexibility, and renewable growth don’t have to be trade-offs,” stated Ramona Vlasiu, Chief Operating Officer at E.ON Next. “By deploying the right technology strategically, we’re proving that flexibility can deliver tangible benefits: making energy more affordable for households, fortifying the UK’s energy system, and increasing reliance on domestic renewable energy sources.”
The project builds on the design and insights gained from the original pilot, which involved fully funded battery installations for vulnerable households. This approach highlights how innovative flexibility strategies can transform persistent challenges into collective successes. E.ON Next is also conducting a parallel trial in Glasgow, focusing on using batteries to support vulnerable families and mitigate child poverty across the city.
This battery initiative is a component of E.ON Next and Coventry City Council’s 15-year Strategic Energy Partnership, aimed at modernising the city’s energy use. The batteries will be installed in eligible homes at no upfront cost, allowing families to store electricity when it is plentiful and inexpensive, and utilise it during peak demand periods. Early data suggests potential savings of up to £360 annually per household, supported by a guaranteed monthly payment of £30, without requiring changes in customer behaviour.
The trial also indicates broader system benefits, with increased flexibility alleviating grid constraints during peak times and reducing the necessity for costly network upgrades. It decreases the volume of renewable energy that must be curtailed during periods of surplus generation — a growing concern as the UK’s wind and solar capacity expands. Previous studies, such as the 2025 project with Northern Powergrid, have shown positive results in this area.
Vlasiu further commented: “E.ON Next continues to explore what is possible by addressing root causes rather than symptoms. By integrating technology with accessible energy systems, innovative thinking, and direct action, we can create a flexible energy system that benefits everyone. We are demonstrating how reliable, clean energy systems and reduced grid constraints, along with enhanced national energy security, ultimately lead to more affordable, predictable energy bills. We urge the government to prioritise these goals through mechanisms like ED3 and other legislative measures.”
As the UK advances towards a low-carbon energy future, E.ON Next’s trial forms part of a long-term Strategic Energy Partnership with Coventry City Council.
