It really doesn't tell what really happened:
-This was only due to hydro production...
-The amount of rain that fell was consistent along those days, which is definitely not usual.
-The energy produced was mainly exported to Spain, but at ZERO or even NEGATIVE euros.
Does this help? Doesn't seem to me! And besides having to pay full price to the renewables producers (while exporting the same energy at ZERO), which amounts to a significant energy deficit, they are talking about even more H2 or whatever schemes??? This is the reason why Portugal has had one of the biggest rises of electricity prices in Europe over the last 15 years...