A year ago, the UK government was selling solar canopies on car parks as a no-brainer.
It just scrapped the plan, after a year of consultation that ended with the Department for Energy Security and Net Zero deciding a national mandate would not deliver the savings it once advertised.
That is a sharp turn for a government that has been pushing hard on net zero.
The original idea, championed by Energy Secretary Ed Miliband, was to require large new outdoor car parks to install solar canopies. The pitch was simple - a typical business with an 80-space car park could cut its annual electricity bill by as much as £28,000.
The Department for Energy Security and Net Zero opened a consultation in May 2025 and collected 125 responses by mid-June. Most respondents backed the idea in principle but flagged practical problems with the execution.
Car parks come in too many sizes, with too many different grid connections, for one rule to work everywhere. Energy UK was one of the trade groups that pushed back on a one-size-fits-all mandate.
The government's partial response last November addressed only the EV charging part of the consultation, leaving the solar mandate hanging. May's decision finally closed the door on it.
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The UK is not abandoning solar, it is just choosing a different fight. Ministers are fast-tracking planning changes to speed up EV chargepoint rollout, with a target of 300,000 public chargers by 2030.
A Planning and Infrastructure Bill is expected to cut some street-works permitting costs from about £1,000 to as low as £45, which should clear the path for faster charger installs.
The Clean Power 2030 plan still calls for UK solar to grow from about 18 GW today to 45-47 GW by 2030. Earlier industry analysis suggested UK service stations alone could generate 124 GWh of solar a year.
Car parks were supposed to be part of that growth, but now they are voluntary.
The scrapped mandate is a quiet but important moment for the UK's green push - a place where the cost-benefit math finally beat the easy political story.
Solar developers in the UK lose what could have been a forced demand driver, while building owners get more flexibility on whether to install canopies and when. The next test is whether the government can find a version of this policy that actually works without forcing every site into the same rule.
For now, the carrot beat the stick.
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