Landowners who are considering generating or storing energy should act fast before grid capacity runs out says an independent power consultant.

According to Roadnight Taylor, the electrical grid is heavily constrained with some areas having only pockets of capacity remaining.

This means that, even where a site has good planning and access attributes, it may not be able to get a grid connection which could stop a project.

In some areas new connections are embargoed, while others have emerged from restrictions following changes to the grid. But as capacity is allocated on a first-come, first-served basis, it is difficult to tell which area may come under pressure next.

South Wales currently has an embargo on new, large-scale gas-fired generation and battery storage projects until 2026.

Chief executive Hugh Taylor said: “These dispatchable energy schemes (which can be switched on and off at any time) are saturating National Grid’s network between South Wales and England at times of peak electrical demand.This means the embargo is unlikely to be alleviated unless there is a reconfiguration of the grid and active management of the network.”

However, this does not signify the end for those wanting to embark on an energy project in South Wales. Non-dispatchable technologies, like wind and solar, aren’t causing the same challenges in the region. And smaller dispatchable energy projects may also be successful.

“The south west of England suffered a similar embargo due to the amount of wind and solar previously developed there.This issue has now been alleviated and there are large-scale opportunities in some areas of Devon, Cornwall and Somerset,” he said.

Mr Taylor suggests seeking independent expert advice to establish whether a project is likely to succeed.