Solar Becomes Luxembourg's Largest Electricity Source in 2025, ILR Reports

On Tuesday 30 June 2026, the Luxembourg Regulatory Institute (ILR) presented the national statistical data for the electricity and natural gas sectors, covering figures for 2025.

According to ILR, the key figures provide information on developments in electricity consumption, domestic electricity generation, battery storage, market shares and electricity prices in Luxembourg.

According to the report, gross electricity consumption, including network losses, reached 6,529 GWh in 2025, representing an increase of 189 GWh (+2.98%) compared to the previous year. Electricity imports totalled 4,776 GWh, while domestic generation increased by 20.8% year-on-year to 1,826 GWh.

Final electricity consumption, excluding network losses, amounted to 6,397 GWh, of which 444 GWh was self-consumed or shared by customers, representing 7% of total final consumption. The report noted that, for the first time, it also documents electricity volumes by sharing level.

ILR reported that photovoltaic power became Luxembourg's largest source of electricity generation for the first time in 2025. Installed solar capacity increased by 35.8% to 746 MW, while solar electricity production rose by 74.3% to 627 GWh, surpassing wind generation, which totalled 467 GWh. The number of photovoltaic installations also increased by 47.3%, reaching 33,304 by the end of the year.

The report also highlighted the continued growth of battery storage. By the end of 2025, Luxembourg had 9,843 battery storage systems, with a combined storage capacity of 101,104 kWh.

In terms of prices, the average electricity supply price (excluding network charges and taxes) fell from €129/MWh in 2024 to €115/MWh in 2025, a decrease of 10.68%. However, the integrated electricity supply price paid by an average residential customer increased to €266.5/MWh (26.65 c/kWh), mainly due to reduced government support and higher network charges.

The report also provides an overview of Luxembourg's natural gas sector. According to ILR, natural gas consumption reached 6,857 GWh (6.86 TWh) in 2025, representing a 1.54% increase compared with the previous year. Domestic gas production from biomass remained limited at 44 GWh, while 6,758 GWh of natural gas was imported, almost exclusively from Belgium.

Encevo Group held a 50.49% share of the residential natural gas supply market in 2025, with Sudenergie ranking as the second-largest supplier. Supplier switching remained limited, with around 0.1% of residential customers and 0.5% of professional customers changing supplier during the year. ILR also noted that 93.75% of customers continued to choose their supplier's standard gas product.

Across all suppliers, natural gas supply turnover for residential and professional customers fell from €382 million in 2024 to €326 million in 2025 (excluding network charges and taxes). The integrated natural gas supply price for an average residential customer, including network charges, taxes and government support, increased from €82.4/MWh in 2024 to €91.4/MWh (9.14 c/kWh) in 2025.