Guidance for Agents on Renewables Obligation for Microgenerators 50kW or Less

Ofgem has updated its Renewables Obligation guidance for agents to reflect the transition from Retail Prices Index (RPI) to Consumer Prices Index (CPI) as the inflation index used for calculating annual adjustments to the buyout price and mutualisation ceiling. This applies to agents acting on behalf of operators of microgenerating stations with declared net capacity of 50kW or less. The guidance also incorporates minor operational process updates to reflect differences between Northern Ireland and Great Britain agent processes.

Agents and operators of renewable microgenerators should ensure they use CPI rather than RPI for any buyout price or mutualisation ceiling calculations under the Renewables Obligation scheme. The guidance document itself (published 2 April 2026) contains the updated procedures and indexation methodology. No specific compliance deadline is stated as this represents updated operational guidance rather than a new requirement.