Answer extracted from The Future of Utilities Podcast — listen to the full episode below.
How will domestic batteries transform homes into active energy grid participants?
Domestic batteries will work alongside renewable energy sources to stabilize grids that depend on unpredictable power generation. The future energy system will combine large-scale batteries paired with hundreds of thousands of distributed batteries in homes, transforming them from passive consumers into active participants that shift demand away from peak times and reduce reliance on gas power plants.
Today's energy systems are engineered to handle the highest peak demand in any given area—a design that drives infrastructure costs and emissions. When peak demand hits between 4 and 7 in the afternoon, utilities typically fire up gas power plants to meet the load. Batteries break this pattern by shifting electricity consumption to off-peak hours, when energy is cheaper and cleaner, allowing homes to store power and release it strategically.
Renewable energy introduces a fundamental challenge: wind and solar are inherently unpredictable. A battery paired with these sources creates a buffer, capturing excess generation when conditions are favorable and releasing stored energy when demand spikes. As Davide Turi explains in the episode, this shift delivers dual benefits: immediate savings for households through time-of-use tariffs, and system-wide emissions reductions by cutting unnecessary gas generation.
"The fastest entry point is really getting a battery installed and let the battery do the hard work and eventually no need for changing your behavior."
Davide Turi — Opportunities Manager for Energy System Challenges, EON. Davide works to identify solutions that solve energy system challenges while lowering customer bills. He leads domestic battery pilot programs targeting fuel-poor households and collaborates with distribution system operators to optimize grid flexibility.
Flexibility at scale requires simplicity in user experience. For domestic batteries to become mainstream, householders must not be asked to actively manage charging and discharging schedules. The technology itself must handle the complexity, operating behind the scenes while users enjoy lower bills and warmer homes. This plug-and-play approach removes behavioral barriers that would otherwise limit adoption.
The scale required is significant: at least 3.7 gigawatts in local distribution areas alone are projected to need flexibility solutions over the next decade. Grid operators, energy suppliers, and hardware manufacturers must align around standardized time-of-use pricing and flexibility services. The episode explores how pilots like Your Next Smart Saver tariff are testing this transition at scale, demonstrating both cost and carbon savings before full rollout.
What remains unresolved is how to ensure fuel-poor households benefit equally. The conversation also addresses practical barriers like installation complexity and housing typology challenges, revealing why distribution system operators and policymakers must move in tandem for this transformation to reach every home.
Key takeaways
- Domestic batteries absorb renewable energy's unpredictability, stabilizing grids that would otherwise need backup gas generation during peak demand (4–7 pm).
- Shifting household consumption away from peak hours through battery storage delivers immediate household savings and reduces system-wide CO₂ emissions.
- User experience simplicity is essential—batteries must operate automatically without requiring householders to actively manage charging schedules.
- At least 3.7 gigawatts of local grid flexibility will be required over the next decade, necessitating hundreds of thousands of distributed home batteries paired with large-scale storage.
See also
What regulatory or policy support is needed to scale domestic battery adoption across the energy system?
Longer-term flexibility contracts with distribution system operators would allow confident investment in residential batteries at scale. Clear policy frameworks supporting time-of-use tariffs and grid services can accelerate adoption industry-wide.
How can domestic batteries be made accessible to fuel-poor households and people in condensed housing?
EON is actively running pilots targeting fuel-poor customers to ensure they understand the opportunity to save money and avoid choosing between eating and heating. Tailored programs and upfront support are essential for equitable access.
How difficult is it to install a domestic battery in a home?
Installation takes half a day with no major changes required to home systems. An engineer simply screws a few holes in the wall, runs a cable, and customers can start managing their energy immediately.