The study by Thema1 – a Berlin-based think-tank – was written in the context of Britain's plan to force large-scale solar to compete with onshore wind for a smaller pot of support under the new contract for difference scheme, "which will seriously undermine or kill that market", the authors say.

The report finds that solar would be competitive without subsidies in the British commercial rooftop market, including schools and offices, by the end of the decade, while the domestic rooftop and large-scale markets would be economic within the next ten years.

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