By the end of November 2018, of the combined 50 530 GWh of electricity produced in mainland Portugal, 52.8 % (26 680 GWh) was from renewable sources and 47.2 % (23 850 GWh) from fossil sources.

The largest renewable contribution came from hydroelectric energy, which represented 24.0 % of the mix and translated into an accumulated hydroelectric producibility index of 1.12. On the other hand, wind energy contributed 22.2 % of electricity production, reflected in a accumulated eolicity index of 1.01. The remaining renewable energy sources made a joint contribution of 6.5 %, with a breakdown of 5.0 % for bioenergy and 1.5 % for solar.

Under fossil sources, conventional thermal (coal and natural gas) made up the vast majority of the distribution, representing 39 % of the electricity mix, with the remaining 8.3 % from fossil cogeneration.
Compared to the previous year, there was a slight reduction in conventional thermal, which represented 50.4 % of electricity production during the same period of 2017.
By the end of November 2018, electricity consumption in mainland Portugal (46 494 GWh) increased by about 1.7 % in relation to the previous year, considering the effects of temperature and business days. Consumption in November increased 5 % compared to the previous year (2.9 % when correcting for temperature and the number of business days).

In turn, regarding international trade, there was an export balance of 2 639 GWh, resulting from the export of 5 216 GWh and the import of 2 577 GWh.