Energy Savings Opportunity Scheme – Now Phase 3
The Energy Savings Opportunity Scheme (ESOS) is an energy assessment and energy saving scheme and is established by the Energy Savings Opportunity Scheme Regulations 2014 (ESOS Regulations).
The scheme applies to large undertakings and groups containing large undertakings in the UK.
An undertaking, as defined in the Companies Act 2006, is:
- A corporate body or partnership
- An unincorporated association carrying on a trade or business, with or without a view to Profit.

Evidence Pack for Compliance
Saving Money
Helps raise awareness of energy consumption issues
Reduce Carbon Emissions
Helps ensure your comapny is energy efficient
Avoid fines
Who qualifies for ESOS?
Any UK undertaking that meets either one or both of the conditions below:
- Employs 250 or more people.
- Has an annual turnover in excess of 50 million euro (£38,937,777), and
- An annual balance sheet total in excess of 43 million euro (£33,486,489)
The scheme is estimated to lead to £1.6bn net benefits to the UK within a few years, with the majority of these being directly felt by businesses as a result of energy savings.
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To comply with ESOS regulations large enterprises will need to undertake an ESOS Assessment, including the following elements:
- Measure your total energy consumption for buildings, industrial processes and transport;
- Identify areas of significant energy consumption, accounting for at least 90% of your total energy consumption;
- Appoint a ‘Lead Energy Assessor’ to oversee the ESOS Assessment; (they can be an external consultant or an in-house expert as long as they are on an approved register).
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To establish the significant energy consumption (90%) and the de-minimis, a full data analysis of all fuels for all buildings, processes and transport will be completed using all available data provided by your organisation, and where possible, from the data collector directly into our process. A full energy profile report will be compiled for the inclusion in the ESOS evidence pack and stored within a purpose-built folder for your organisation.
We will provide monthly review calls and establish your organisation status and construct and agree methodology to compliance for board level sign off.
In line with ESOS requirements an evidence pack will need to be compiled and stored within the system for inspection by the Environment Agency on demand. ESOS also requires a top-level business case to be prepared and presented at board level for final sign off by a board director. Once we have a signed off the assessment a declaration of compliance will be entered via the registration portal on the Environmental Agencies website.