Guidance: Renewables obligation level calculations: 2020 to 2021

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The renewables obligation (RO) scheme places an annual obligation on UK electricity suppliers to present to Ofgem (the scheme’s administrator) a specified number of Renewables Obligation Certificates (ROCs) per megawatt hour of electricity supplied to their customers during each obligation period.

The Renewables Obligation Order 2015 requires the Secretary of State to publish the level of the obligation (in ROCs per megawatt hour) 6 months before the start of each obligation period (which runs from April to March).

This note sets out the level of the obligation for the 2020 to 2021 period and explains the underpinning methodology.