Understanding energy audits and ESOS compliance

Energy: Paul Hughes, PLH Utilities

Thinking about your energy bills? Of course, every business wants the best deal when it comes to energy. But have you ever stopped to consider how much your building itself influences the energy you’re actually using?

Matt Dillon from our partner company, Focus Green, has created a super useful guide that dives into exactly that. It’s packed with insights to help you understand how your building and pocket would benefit from an energy audit.

Key takeaways

1. Commercial energy audits help businesses identify energy waste, leading to 10% to 40% cost savings while promoting sustainability.
2. The Energy Savings Opportunity Scheme (ESOS) mandates large UK businesses to conduct comprehensive energy assessments every four years.
3. Compliance with ESOS prevents penalties, enhances operational efficiency and brand reputation, and contributes to national sustainability goals.

Overview of commercial energy audits

Energy audits are crucial for companies seeking to improve energy efficiency and discover potential areas for energy savings. A skilled auditor meticulously quantifies an organisation’s power use by evaluating past utility data and inspecting energy-consuming systems. 

This comprehensive assessment typically uncovers opportunities for considerable cuts in electricity expenditures, often within 10% to 40%.

Measuring and calculating the energy intensity ratio is essential to evaluate significant energy consumption areas. An energy management system is crucial in achieving these goals by continuously monitoring and optimising energy use.

What is the ESOS?

ESOS is a mandatory energy assessment and savings programme designed for large businesses in the UK. Under this scheme, companies must conduct comprehensive energy audits every four years to identify cost-effective, energy-saving opportunities, contributing to environmental sustainability and reducing carbon emissions.

Eligibility criteria for ESOS

To adhere to ESOS regulations, an enterprise must be recognised as a large undertaking which is a business with over 250 employees, or exceed specific fiscal parameters, including an annual revenue greater than £44 million and an annual balance sheet totalling over £38 million.

Steps to an ESOS energy audit

1. Evaluate the present state and patterns of energy use within the organisation.
2. Estimate total power usage over at least 12 months, backed by verifiable data.
3. Identify sectors with significant energy use (must represent at least 95% of overall power consumption).
4. Calculate energy intensity ratios.
5. Produce a detailed report outlining key findings and energy-saving opportunities.

Key deadlines and compliance periods

For Phase 3, annual progress updates are required by December 5, 2025 and December 5, 2026, each covering the preceding 12 month period.

Phase 4 runs from December 6, 2023 to December 5, 2027, with the qualification date on December 31, 2026 and the compliance deadline on December 5, 2027. ESOS 4 doesn’t need to cover Net Zero Carbon, that’s now moved to ESOS 5.

Penalties for non-compliance

Under the amended ESOS regulations, penalties for non-compliance can include a fixed penalty of up to £50,000 and additional daily penalties. 

The Environment Agency determines the exact amounts and enforcement measures, and they may vary based on the nature and severity of the non-compliance. Public disclosure of non-compliance may damage an organisation’s reputation.

Benefits of ESOS compliance

• Significant cost savings through reduced utility expenses.
• Enhanced operational efficiency and equipment longevity.
• Contribution to environmental protection efforts.
• Improved brand reputation and competitive edge.
• Alignment with sustainability objectives.

Technological innovations in audits

Building analytics software scrutinises energy data and streamlines issue detection, supporting businesses in achieving peak energy efficiency levels. It offers real-time monitoring capabilities, facilitates predictive maintenance and guides strategic decision-making to implement sustainable practices that reduce the carbon footprint.

Implementing energy-saving measures

Following an ESOS audit, implementing energy-saving measures is essential. Simple alterations such as advancing lighting systems or refining HVAC operations can lead to notable reductions in energy consumption, enhance overall efficiency and simplify the switch to sustainable power sources.

By monitoring progress and maintaining compliance, organisations can ensure they meet ESOS requirements, avoid penalties and reap the benefits of improved energy efficiency and cost savings.

Another way to reduce fuel costs and emissions is with an Optiburner Dynamic Boiler Management Unit (DBMU).

DBMU optimises cooling cycles and burn times, cutting fuel use by 15% to 30%. It is BRE-certified and compatible with all boilers delivering immediate carbon and cost savings. For more information visit www.optiburner.com/resources

Expert ESOS support

For specialist assistance with ESOS compliance, action plans or energy audits, contact Focus Green at matt@focusgreen.co.uk. As the UK’s leading ESOS specialists, our experienced team offers personalised advice and actionable insights across diverse sectors. We manage every stage of the ESOS compliance journey, from initial assessments to comprehensive reporting, helping you transform regulatory requirements into strategic opportunities for efficiency and growth.