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April 2026 GB Forecast update: Modelling changes and revenue impacts to BESS across Great Britain

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April 2026 GB Forecast update: Modelling changes and revenue impacts to BESS across Great Britain

​Modo Energy's April 2026 GB forecast release is out. The new release sees minor changes in GB BESS lifetime revenues. For a 2h asset doing 2 cycles per day, lifetime revenues are 1.3% lower, while discounted revenues drop 0.25%.

Revenues are up in the short term, due to higher gas prices and less competition due to Connections Reform slowing the pace of battery buildout. Enhanced modelling of EV smart charging and vehicle to grid (V2G) flexibility suppresses day ahead price spreads and revenues fall after 2035 vs the Jan-26 release.

Higher gas prices raises CCGT run costs, but lower UK ETS and the removal of Carbon Price Support partially offsets it

War in the Middle East has pushed gas prices up to 2030, while UK ETS prices are down 18% across the first three years of the forecast.

​The removal of Carbon Price Support (CPS) from UK thermal generators from April 2028 was announced by the UK government on 16 April 2026. As a result, the SRMC of a high-efficiency gas CCGT is down 8%, suppressing day-ahead price spreads.

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