Slow solar rollout exacerbating grid supply concerns, French system operator RTE warns

Facebook
Twitter
LinkedIn
Reddit
Email
A solar install in France completed by GDF Suez. Image: GDF Suez

France’s grid operator RTE has warned of tighter than forecast power supply margins, with delays to renewables development in the country expected to exacerbate a shortfall of nuclear generation.

In its report on the electricity system’s operational health between 2021 and 2030, published earlier today (24 March 2021), RTE warned that power supply margins between now and 2024 would be more constrained, with the forthcoming winter period of 2021/2022 requiring “particular vigilance”.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

The report, a legal responsibility of the system operator in France, warns that a combination of outages at France’s existing nuclear fleet for maintenance, continued delays in the construction of the Flamanville reactor and delays affecting the deployment of renewables – particularly solar and offshore wind – have led to less power generation than expected being available in the short-term.

In particular the report, which can be read in full here, warns that a downturn in economic activity related to the COVID-19 pandemic has created a downturn in the deployment of solar, meaning that the country’s 2023 targets for deployment appeared “out of reach for solar”.

However the report also stresses that even notwithstanding the disruption felt in 2020, solar deployment in particular has failed to live up to expectations. Against an expectation of around 20GW of solar PV by 2023, France is on track to have a cumulative solar generation capacity closer to 15GW by that date.

This is set to create pinch points over the coming three years, before a return to more normalised power supply margin between 2024 and 2026 as the Flamanville reactor and greater quantities of renewables come on stream.

RTE has, however, established a list of priorities to be pursued in the short term to help alleviate supply constraints, chief among them being to increase the deployment of renewable power in the country to help meet the objectives set within RTE’s multi-year planning approach.

Between 2024 and 2026, greater quantities of demand response and interconnectors are also expected to play a key role.

Xavier Piechaczyk, chairman of the board at RTE, said the country needed to strengthen its short-term margins in order to create a steadier transition for its electricity system.

“We are already on the path to decarbonisation, not only of the electricity system itself, but more broadly of the entire economy, by allowing transfers of uses from fossil fuels to electricity. It is essential to achieve our climate goals,” he added.

Read Next

October 13, 2026
The ESMC has called on European policymakers and individual member states to rebuild the European PV industry across its entire value chain.
October 13, 2026
New Zealand retailers Briscoe Group and Farro have signed electricity supply agreements with solar generator Lodestone Energy.
October 12, 2026
Australia's rooftop solar sector posted its strongest half-year performance since 2021, with battery storage increasingly riding alongside it.
October 9, 2026
Australia has endorsed a global plan to double the number of homes with rooftop solar PV by 2030, becoming the first country to do so.
Premium
October 8, 2026
PV Talk: Indosol's Manoj Pothireddy tells PV Tech Premium that opportunities remain for overseas wafer manufacturers to export to the US.
October 8, 2026
South Korea’s Ministry of Climate, Energy and Environment (MCEE) has unveiled its KRW1,000 trillion (US$747 billion) Korean Green Transformation (K-GX) industrial strategy.

Upcoming Events

Solar Media Events, Upcoming Webinars
October 21, 2026
2pm AEDT
Solar Media Events
November 3, 2026
Málaga, Spain
Solar Media Events
November 24, 2026
Warsaw, Poland
Solar Media Events
February 2, 2027
London, UK