In a milestone that is becoming more and more commonplace in Europe, Portugal just spent 4 days generating the entirety of its power from renewable sources. The period totalled 107 hours, lasting from May 7th to 11th, and was only revealed after a data analysis of its national energy network figures.

The news of Portugal’s renewable run comes just days after it was revealed that Germany was able to generate all of its power from renewables on May 15th, at times briefly driving the price of a megawatt hour into the negatives, as low as -50 euro’s at one point.

Just last year Denmark managed to produce 42% of its power from wind. On one mammoth day its wind farms produced 140% of its national need, sharing 80% of the surplus power with Germany and Norway, with the last 20% going to Sweden.

The United Kingdom recently achieved its first ever full week of power without the usage of coal since the opening of its first coal-fired station in 1882, though it was helped along by summer weather reducing power demand and nearly half of coal stations being out of service. The UK government plans to phase coal out entirely by 2025.

Those working in the field believe that these recent milestones and records will quickly be broken and surpassed by even more impressive feats, signalling a changing of tides in power generation.