The demand for electricity in the peninsula fell in March to 20,739 gigawatt hours (GWh), which meant a fall of 5.9% compared to the same month last year, according to Red Eléctrica (REE).
Once the effects of the calendar and temperatures have been corrected, the interannual decrease is 4.5%.
In the first quarter of 2018, the peninsular demand was approximately 64,102 GWH, 2.8% less than last year or 2.1% less, if calendar and temperature corrections are applied.
Renewable energies generated 43.5% of production in March, while 70.9% of production came from technologies that do not emit CO2.
By type of energy, nuclear was the technology with the highest production, with 26.6% of total generation, followed by wind with 24.2%, cogeneration (13%), hydroelectric (11.1% ) and combined cycles (10.9%).
In the quarter, nuclear produced 24% of the energy consumed by Spaniards and was the most used, followed by wind (22.9%), cogeneration and combined cycles (12.4%), hydraulics (10 , 8%) and coal (9.8%).
In the first three months of 2019, wind energy generated 4,794 GWH, 37.3% less than in the same period last year.