Between January and September, electricity consumption reached 40.5 TWh, the highest value ever recorded in the national system for this period, surpassing the previous maximum recorded in 2025 by 3.4% (2.9% after adjusting for temperature and working days). In September alone, electricity consumption registered a year-on-year growth of 6.8% (3.3% adjusting for the effects of temperature and working days), driven by the high temperatures that were felt, according to a press release.
According to the same source, in the first nine months of the year renewable production supplied 64% of consumption, distributed as hydroelectric at 24%, wind at 23%, photovoltaic at 13% and biomass at 5%. Natural gas production supplied 14% of consumption, with the remaining 22% corresponding to imported energy, representing the largest import balance ever for this period. In this period, the hydroelectric producibility index registered 1.21, the wind producibility 0.97 and the solar producibility 0.82 (historical averages of 1).
In September, renewable production supplied 52% of national consumption, non-renewable production 13%, while the remaining 35% corresponded to imported energy. The solar producibility index registered 0.96, the wind 0.88 and the hydroelectric 1.39 (historical averages of 1).
In the natural gas market, September saw a 12% drop, with declines of 15% in the electricity generation segment and 10% in the conventional segment. In the nine-month period, natural gas consumption totalled 33.2 TWh with a marginally positive year-on-year variation of 0.5%, the result of a 4.5% increase in the electricity market and a 1.2% decrease in the conventional market.
In September, national supply was carried out entirely from the Sines LNG terminal, while the interconnection with Spain recorded a net export balance, equivalent to 62% of national consumption.
In the first 9 months of the year the national system has been almost entirely supplied from the Sines terminal with origin predominantly in Nigeria (58%), followed by the United States (34%) and Russia (8%). The net export balance through the interconnection with Spain was, for this period, the highest ever in the national system.
