Dare we say, nuclear energy?
From https://www.world-nuclear.org/information-library/country-profiles/countries-a-f/france.aspx
France derives about 75% of its electricity from nuclear energy, due to a long-standing policy based on energy security. Government policy is to reduce this to 50% by 2035.
France is the world's largest net exporter of electricity due to its very low cost of generation, and gains over €3 billion per year from this.
The country has been very active in developing nuclear technology. Reactors and especially fuel products and services have been a significant export.
About 17% of France's electricity is from recycled nuclear fuel.
Efficient, reliable, plentiful. Of course the French will be decommissioning many of their nuclear plants. Lets see how the availability and cost curves look in the future as France moves to renewables.
Hopefully we will master fusion reactors soon and then folks will have all the power they want.
Just my opinion.