French electricity is decarbonized, but the economy is not electrified

Each kilowatt-hour produced in France emits 19.6 grams of CO2 equivalent [1]. In Europe, the average exceeds 178 grams [1]. Nine times less.

Meanwhile, the share of electricity in final energy consumption stagnates, transport shows an electrification rate of 2 % [3], and 3.2 million households spend more than 8 % of their income on energy bills [8]. France holds a carbon advantage without parallel on the continent. It has not yet used it to decarbonize its economy. That is the 2027 trade-off.

Seventy years of nuclear power, one crisis and a rebound measured in numbers

The French nuclear fleet was built in twenty years. Forty-eight of the current 63 GW came online between 1979 and 1990 [9]. This deployment pushed nuclear to 76 % of electricity generation in 1990 [9]. This level held until the 2010s, then declined gradually.

Two drops followed. In 2022, stress corrosion cracking led to massive shutdowns. Nuclear’s share fell to 62.8 % of the electricity mix [1]. Before that, France had decided in 2015 to reduce this share to 50 % by 2025. The target was postponed to 2035 in 2017, then formally abandoned when a restart was announced in 2022 [9].

The rebound is documented. In 2025, the 57 reactors in service generated 373 TWh. This represents 68.1 % of the country’s electricity, the highest level since 2019 [1]. France’s first EPR reactor, Flamanville 3, was connected to the grid at the end of 2024. It is the first nuclear unit commissioned in France since 1999 [1].

Renewables are advancing in parallel. Photovoltaic solar capacity gained an additional 5.9 GW in 2025, bringing installed capacity to 30.4 GW at year-end [1]. This figure now exceeds 25.7 GW of hydropower [1]. Electricity production from fossil fuels reached its lowest level in nearly 75 years. It stands at 18.7 TWh in 2025, of which 16.4 TWh was produced by gas plants [1].

The result is a European singularity. The carbon intensity of French electricity production remained generally below 60 grams of CO2 per kWh in 2025, even at times of high production [10]. No large European country comes close.

But this figure should not be misleading. Electricity accounts for approximately 26 % of final energy consumption in France [1]. The rest—transport, residential heating, industry—runs mostly on fossil fuels. That is where the real work lies.

The shift in energy use has not begun

The lag in electrifying end uses is measurable. The share of electricity in final energy consumption has remained broadly stable for many years [1]. Electric vehicles and heat pumps are progressing, but the pace falls short of what the Fit for 55 requires by 2030 [1].

The figures by sector clarify the geography of this lag. In transport, electricity consumption reaches 13 TWh in 2025 [3]. The electrification rate there remains at 2 % [3].

In industry, electricity consumption stands at 100 TWh [3]. The industrial electrification rate is 36 %, while the target for 2030 is 45 % [3]. This rate has even declined in recent years, due to the drop in industrial electricity consumption [3].

Total electricity consumption in metropolitan France remained stable in 2025 at 451 TWh [1]. That is a 0.4 % increase from 2024. This figure remains roughly 6 % below the levels observed over 2014–2019, before the pandemic and energy crisis [1].

The arithmetic consequence is uncomfortable. France has an abundance of low-carbon electricity facing demand that is growing too slowly [3]. RTE projects demand around 510 TWh in 2030 [3]. For 2035, the rapid decarbonization trajectory requires nearly 580 TWh [3]. Reaching these volumes requires an acceleration that current trends do not suggest.

Behind this lag sits a mechanism that subsidy policy does not resolve. Households at the bottom of the income distribution cannot afford to buy an electric vehicle or finance a heat pump, even with assistance. These appliances require significant out-of-pocket costs and budget stability that the poorest 30 % of households do not have.

The December 2024 dashboard from the National Observatory of Energy Poverty measures this: 3.2 million households, more than 10 % of the population, spent more than 8 % of their income on residential energy bills [8]. These homes are among the 30 % poorest in the country [8]. Subsidizing consumption without acting on the cost of initial access repeats the equation without solving it.

Two hundred billion committed, a financing plan still missing

The first rupture is industrial and financial. France has decided to build six new EPR2 reactors, with an option for eight more. This program enters a documented zone of uncertainty.

The Court of Auditors described the costs and schedules of past nuclear projects as “systematic overruns” [4]. It estimated the total cost to completion of Flamanville 3 at 20.4 billion euros in 2015 values [4]. That is 1.3 billion more than its 2020 estimate [4].

For the EPR2s, estimates at the end of 2023 put the three future pairs at 67.4 billion euros in 2020 values [4]. This amount was raised to 79.9 billion in 2023 values [4]. Including financing costs, total spending could exceed 100 billion euros [4].

The major overhaul—extending the existing fleet beyond 40 and then 60 years—represents a parallel burden. The Court of Auditors puts its total cost at 100.8 billion euros over 2014–2035 [5]. Including routine maintenance, this amount reaches 131.9 billion [5].

The Court considers this option financially advantageous compared to building new capacity [5]. Maintaining reactors already costs 6 billion euros per year [5]. It will peak at nearly 7 billion in 2029 [5].

The total is massive: over 200 billion euros committed or projected on the nuclear front alone over twenty years. EDF carries this program with a still incomplete financing plan for EPR2 [4].

The second rupture is less visible but equally structural: nuclear’s role is changing. For forty years, French reactors ran at nearly constant power. Now, the growing insertion of solar, which produces massively at midday hours in spring and summer, is pushing reactors toward more downward modulation in the middle of the day [1]. What the system gains in flexibility it loses in capacity factor and thus in profitability of facilities. No planning from the 1970s to 2000s had integrated this parameter.

The return of nuclear is global. Installed capacity was 420 GWe in 2024 [6]. The IEA projects 728 GWe in 2050 under the current policies scenario [6].

The IAEA has revised its projections upward for five years in a row [7]. In its high scenario, it projects more than a doubling of global nuclear capacity by 2050 [7]. France is in line with this trend, but its challenge remains financing this return with a constrained state and an indebted operator.

Build the future fleet or electrify end uses first

The central mechanism is this: France has abundant and cheap low-carbon electricity at the production level. This stock is not yet being used to decarbonize the economy because end uses have not shifted. Public policy focuses on supply—that is, growing low-carbon capacity. The bottleneck is on the demand side.

Subordinate the EPR2 timeline to securing financing. The Court of Auditors has documented the absence of a final cost estimate and financing plan for this program, and recommended deferring the final investment decision until these are clarified [4]. Setting a decision before the cost is known amounts to signing a blank check. Budget priority goes first to the major overhaul, better assessed and with more predictable returns [5], and to accelerating renewables, which is less capital-intensive. Thermal decarbonization and flexibility infrastructure deserve the same mobilization as new construction [3].

Shift electrification subsidies toward access rather than usage subvention. Households at the bottom of the income scale cannot mobilize out-of-pocket costs for a heat pump or electric vehicle [8]. Current subsidies proportionally benefit more middle-income households who can advance the funds. A third-party financing or social leasing formula, which eliminates the entry cost in exchange for a capped monthly rent, would transform de facto ineligibility into real access. Financed equipment respects a carbon content threshold, according to the conditionality set in the article “France decarbonizes its soil and imports its carbon.” The barriers to transformation are economic and informational before they are motivational [14][15].

Plan flexibility at the network scale, not just at production. RTE’s 2025 forecast report identifies growing needs for storage and control [3]. The variability of renewables and the rise in industrial uses require strengthening all balancing mechanisms [3]. The 2025–2035 period will be critical for electrical infrastructure: copper constraints, network construction delays, availability of skilled labor [11]. The tariff signal—on and off-peak hours and dynamic pricing—must encourage active demand management.

Publish an annual dashboard of electrification by sector and income level. The declared objective of 55 % electricity in final consumption by 2050 will remain an intention without disaggregated measurement by sector and income profile. RTE publishes the overall trajectory [3]. The trajectory by income level does not yet exist. Without this tool, public policies correct an average without seeing the distribution. An objective that cannot be tracked at the level of the most precarious households will lose its political credibility, a dimension Stefanie Stantcheva has documented on climate policies in advanced economies [16].

Nuclear’s share of the mix will fall as renewables gain power. That is mechanical. The real decision concerns the 40 million oil and gas boilers, the 38 million petrol and diesel vehicles, and the 5 million industrial SMEs that have not yet switched [3]. Converting the carbon advantage of the production mix into a genuinely decarbonized economy is the work of a generation. The next five years will set its trajectory.

Sources

[1] RTE, “Electricity Balance Sheet 2025: Key Results,” February 2026, https://assets.rte-france.com/prod/public/2026-02/Bilan-electrique-2025-principaux-resultats.pdf (accessed 30/09/2026).

[2] RTE, “Energy Futures 2050,” October 2021 (in-depth analyses February 2022), https://www.rte-france.com/donnees-publications/etudes-prospectives/futurs-energetique-2050 (accessed 30/09/2026).

[3] RTE, “Forecast Balance Sheet 2025–2035: France is in an advantageous position to electrify,” December 2025, https://assets.rte-france.com/prod/public/2025-12/2025-12-16-bilan-previsionnel-principaux-resultats-2025.pdf (accessed 30/09/2026).

[4] Court of Auditors, “The EPR Sector: New Momentum, Persistent Risks,” 14 January 2025, https://www.ccomptes.fr (accessed 30/09/2026).

[5] Court of Auditors, “Major Overhaul: November 2025 Report,” 17 November 2025, cited via Opéra Énergie, https://opera-energie.com/media/edf-la-cour-des-compte-estime-rentable-la-prolongation-des-reacteurs-au-dela-de-60-ans/ (accessed 30/09/2026).

[6] IEA, World Energy Outlook 2025, November 2025, https://www.iea.org/reports/world-energy-outlook-2025 (accessed 30/09/2026).

[7] IAEA, Energy, Electricity and Nuclear Power Estimates for the Period up to 2050, 45th edition, September 2025, https://www.iaea.org/publications/15621 (accessed 30/09/2026).

[8] ONPE, Energy Poverty Dashboard, December 2024, https://www.precarite-energie.org/wp-content/uploads/2024/12/onpe-tableau-de-bord-2024-compressedvf2.pdf (accessed 30/09/2026).

[9] Connaissance des Énergies, “French Nuclear Fleet: Number, Map and Production,” June 2026, https://www.connaissancedesenergies.org/fiche-pedagogique/parc-nucleaire-francais (accessed 30/09/2026).

[10] SFEN, “Low-Carbon Electricity Production in Europe: The Graph That Underscores French Singularity,” February 2026, https://www.sfen.org/rgn/production-delectricite-bas-carbone-en-europe-le-graphique-qui-souligne-la-singularite-francaise/ (accessed 30/09/2026).

[11] Jancovici, Jean-Marc / Shift Project, cited in Frenchweb, “Why Electricity Will Be the New Oil,” April 2026, https://www.frenchweb.fr/jean-marc-jancovici-the-shift-project-pourquoi-lelectricite-sera-le-nouveau-petrole-et-le-nouveau-point-de-tension/461448 (accessed 30/09/2026).

[12] Maisonneuve, Cécile, French Energy Institute, “From Shale to Rafale: Energy and Alliances in the Middle East,” 2025, https://www.connaissancedesenergies.org/cecile-maisonneuve (accessed 30/09/2026).

[13] Fremaux, Benjamin, Montaigne Institute, “We Are Becoming a Heavy Player in Investment,” 2025, https://www.institutmontaigne.org/rencontres/quelles-solutions-face-la-crise-climatique (accessed 30/09/2026).

[14] Martinot, Bertrand, Work Is the Solution: Reconciling the French with Work, 2025, reference corpus.

[15] Palier, Bruno, Political economy of work and social protection, reference corpus.

[16] Stantcheva, Stefanie, IMF Podcast, “Women in Economics: Thoughts that Matter,” July 2025, https://www.imf.org/en/news/podcasts/all-podcasts/2025/07/15/stefanie-stantcheva-women-in-econ (accessed 30/09/2026).