The Energy Savings Opportunity Scheme, or ESOS, is a new mandatory energy-assessment and efficiency scheme in the UK that implements parts of the EU Energy Efficiency Directive (2012/27/EU). ESOS requires participants to carry out energy savings assessments every four years that audit energy used by their buildings, industrial processes and transport, as applicable, in order to identify cost-effective, energy-saving measures. The UK Department of Energy and Climate Change expects about 9,400 participants in the first phase of the scheme, which ends in 2015. Thereafter, ESOS will run in four-year phases.

View full memo, UK Energy Savings Opportunity Scheme