Kinetic Energy Recovery Systems (KERS), once mainly associated with Formula 1 racing and industrial machinery, are now finding innovative applications in the built environment. By capturing and reusing energy generated from movement—such as lifts, revolving doors, and even gym equipment—KERS can reduce a building’s net energy demand. But how do these systems influence Energy Performance Certificate (EPC) ratings? This article explores the link, the assessment challenges, and the practical implications for property owners.
Understanding Kinetic Energy Recovery in Buildings
In a building context, KERS typically work by:
Regenerative lifts that convert braking energy into usable electricity.
Treadmill or gym systems that feed power back into the grid.
Revolving doors with integrated generators.
Escalators with regenerative braking.
While the output from these systems is often modest compared to total building consumption, every kilowatt-hour saved contributes to better energy efficiency metrics.
How EPC Assessments View KERS
The EPC methodology in the UK—based on Standard Assessment Procedure (SAP) for dwellings and Simplified Building Energy Model (SBEM) for non-domestic buildings—measures the building’s predicted energy use per square metre. KERS can influence the EPC score if:
The energy recovered is directly offset against grid consumption.
The system is permanently installed and documented in the building’s specifications.
The assessor can provide evidence of annual energy savings.
Without proper documentation or manufacturer data, EPC assessors may be unable to credit KERS in the official rating.
Benefits for EPC Ratings
Reduced Carbon Emissions – By offsetting grid electricity use, KERS can lower the calculated CO₂ emissions in EPC software.
Lower Primary Energy Demand – Especially in high-traffic buildings like offices, stations, or shopping centres.
Future-proofing – As EPC standards tighten toward 2030 and beyond, integrated energy recovery can be a compliance advantage.
Challenges in EPC Integration
Despite the potential, KERS face several EPC-related hurdles:
Data Gaps – Lack of standardised reporting for recovered energy.
Minimal Impact in Low-Use Areas – If movement-based systems are rarely used, EPC impact may be negligible.
Software Limitations – Current EPC tools may not have dedicated KERS inputs, meaning they are modelled as “renewable electricity” or “other savings.”
Maximising EPC Gains from KERS
To ensure your KERS investment boosts your EPC score:
Document Everything – Installation specs, output estimates, and commissioning reports.
Integrate with Energy Monitoring Systems – Provides verifiable savings data.
Combine with Other Measures – Pair with LED lighting, insulation upgrades, and HVAC optimisation for greater EPC improvement.
The Bigger Picture
While KERS alone may not take a building from an EPC E to an EPC B, they are part of the growing portfolio of innovative energy solutions that can make properties more sustainable and attractive to tenants. For high-occupancy or high-movement environments, the technology’s potential is even greater.
Related Resources
About Us – Learn about our EPC expertise.
Residential EPC – For homes integrating renewable or recovery technologies.
Same-Day EPC – Fast assessments for urgent property needs.
Pricing Plans – Understand EPC costs for your project.
Contact Us – Speak to an assessor about including KERS in your EPC.
