More than half the renewable energy projects needed to meet the government’s clean power targets by 2030 are now able to plug into the electricity grid after years of delay, according to the system operator.

The National Energy System Operator (Neso) has offered more than 700 clean energy projects in Great Britain a grid connection date since the start of the year, after a two-year process to unblock a bottleneck that threatened to delay projects into the 2030s.

These projects represent almost 60% of the 1,200 clean energy schemes that will need to begin generating electricity by the end of the decade to meet the government’s goal of creating a virtually carbon-free grid by 2030.

The Labour party came to power almost two years ago with a promise to double the UK’s onshore wind, triple its solar power and quadruple its offshore wind capacity in an unprecedented buildout of renewable energy.

However, there were doubts about whether the ambition was achievable, given the years of lengthy delays to connect to the grid amid a surge of speculative applications that created a logjam in the “first come, first served” queueing system.

After a two-year process to clear the backlog that began in late 2023, the system operator pulled the plug on hundreds of speculative projects which had stopped “shovel-ready” schemes from connecting to the power grid and began offering connection dates to projects which are ready to be built.

Michael Shanks, the energy minister, said: “Upgrading the grid and making it easier for clean power projects to connect to it will help protect bill payers from fossil fuel price spikes.

“This milestone is a landmark step in putting connections reform into action – with offers issued to over 700 shovel-ready projects that will help to bring down bills for good with clean energy that we control.”

The ready-to-go energy projects – including wind and solar farms, battery storage, gas and hydro plans – amount to 37 gigawatts of new electricity capacity, or just over a third of the 100GW which will be needed to meet the target.

Under Neso’s new rules, projects must meet stricter criteria to apply for a grid connection, including securing planning permission and land rights, and must be in alignment with the government’s clean energy targets.

These standards mean that only projects that are highly likely to be delivered in the coming years will be offered a date to connect to the grid. Previously, the connections queue grew significantly to more than twice the capacity needed to achieve net zero by 2050 owing to speculative “zombie projects”.

Kayte O’Neill, Neso’s chief operating officer, said the latest “milestone” showed that its reforms were “delivering real results”.

“These offers give developers the certainty they need to invest, supporting economic growth,” she added. “They also help deliver the reliable, clean and affordable energy system Britain needs. With over half of offers made, we are focused on the next phase of delivery.”