Energy Savings Opportunity Scheme (ESOS)—qualification and organisational structures

Produced in partnership with King & Wood Mallesons
Practice notes

Energy Savings Opportunity Scheme (ESOS)—qualification and organisational structures

Produced in partnership with King & Wood Mallesons

Practice notes
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The Energy Savings Opportunity Scheme (ESOS)

ESOS is an energy assessment and energy savings scheme. It is mandatory for organisations that meet the Qualification criteria. It derives from the EU Energy Efficiency Directive 2012/27/EU, art 8(4)-(6), which requires EU Member States to ensure that enterprises that are not small and medium-sized enterprises (SMEs) are subject to an energy audit carried out at least every four years.

For more information, see Practice Note: Energy Efficiency Directive 2012/27/EU—snapshot.

The requirements of the Energy Efficiency Directive, art 8(4)–(6) were implemented in the UK through the Energy Savings Opportunity Scheme Regulations 2014 (ESOS Regulations), SI 2014/1643. The Energy Act 2023 has granted powers to make necessary changes to ESOS post-Brexit, and the Energy Savings Opportunity Scheme (Amendment) Regulations 2023, SI 2023/1182 have made changes in advance of the Phase 3 compliance deadline.

Organisations that qualify must undertake an energy assessment and audit of their total energy consumption. In most cases the audit needs to be conducted or reviewed by a 'lead assessor', who must be a member of a

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Jurisdiction(s):
United Kingdom
Key definition:
Energy Savings definition
What does Energy Savings mean?

[means products or systems that use as little electricity, gas, or other forms of energy as possible. OR means the amount of energy saved following implementation of energy efficient measures or practices. OR means an amount of saved energy determined by measuring and/or estimating consumption before and after implementation of one or more efficiency'>energy efficiency improvement measures, while ensuring normalisation for external conditions that affect energy consumption. OR means the amount of energy saved per annum and expressed in kilowatt hours (kWh) and that result from the [measures specified in Schedule [X]].]

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