You think it's too much or too little? Sun availability didn't matter much in Spain until recently, as the country finally got rid of the "sun tax" that limited the development of wide-spread solar panel usage. Essentially, even if you used solar panels, you'd be taxed on every kWh produced, even from your own solar panels. Luckily, they got rid of it, so probably the development will ramp up a bit from now on.

Right now the latest data is from 20:00 and it says 3.3% so when the comment above was made, the sun was shining a bit more.

(But I think the sun goes down a bit earlier, but there are also the canarian islands as part of spain, way further south and west of the mainland)

Probably the difference in solar installations.

Portugal is on the Atlantic coast so has more wind and rain. A lot of inland Spain is pretty arid, making it ideal for solar.