ESOS II (UK)

ESOS is a UK law that gives effect to EU Law concerning the energy audits of large companies (an article of the Energy Efficiency Directive). An equivalent of ESOS is in place in each of the other EU-27 member state countries.

Under ESOS, large UK organisations were required to carry out ESOS energy assessments before the deadline of 5 December 2015, using one of four compliance routes:

• ESOS Energy Audit

• ISO 50001 Certification

• Display Energy Certificates

• Green Deal Assessments.

By the deadline, qualifying organisations should have carried out their energy assessment(s) and notified the Environment Agency (EA). The assessments should then be repeated at least once every 4 years.

If an organisation has a UKAS-accredited ISO 50001 certificate that covers the full scope of ESOS, then this will suffice as ESOS compliance. All organisations need to do then, is notify the EA and provide proof of compliance via that route.

However, if ISO 50001 is not used as a route to compliance, then an ESOS energy audit will be needed as the next best and most common available route to compliance.

ESOS II or ESOS 2 ?

Every four years, a new compliance period starts. The qualification date for compliance Period 2 is 31 December 2018, with proof of compliance covering the period (from 6 December 2015 to 5 December 2019) being required by 5 December 2019. This is known as ESOS II or ESOS 2. It is not a change in the law, it is a new compliance period starting.

If your organisation has chosen an ESOS energy audit as the compliance route for Period 1 then you will now have an ESOS evidence pack that will include:

• the calculation for your total energy consumption

• a list of your identified areas of significant energy consumption

• details of the energy saving opportunities identified.

However, you won’t be able to use this information to demonstrate Period 2 compliance, so this exercise will need to be repeated – see earlier for the ESOS 2 deadlines.

Alternatively, information from your first ESOS energy audit can be used as the basis for implementing an energy management system (EnMS) to allow realisation of the energy saving opportunities.

If your system is then certified to ISO 50001 during the first four years, your organisation will automatically demonstrate Period 2 ESOS compliance.

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