The panels in Spain are on the ground and he alters the angle manually through the seasons to get the optimal angle. It's quite high but near the sea so clear crisp winter skies compared the more humid summer conditions must contribute to the result. There are plenty of articles explaining the output losses of solar PV as the temperature increases. It's certainly a substantial consideration.
It seems obvious that fixed solar panels should be aligned with a winter sun bias but most people want then flat on their roof so they blend. Having them lifted off the roof would also allow the air to circulate and cool them. That way the annual supply would be smoothed out.
As panels get more efficient the weather has less effect and the high efficiency in cold conditions shouldn't be underestimated.
There's the $300,000,000 they threw at the Collie power stations a few years ago to keep them going instead of using it towards a better alternative which will happen now.
How much has been wasted and earmarked on the proposed Adani coal mine[a vital part of a coal power station]?
Do I recall it being in the $billions?
Globally $5.3 trillion for 2015 alone.
A 2016 study estimated that global fossil fuel subsidies were $5.3 trillion in 2015, which represents 6.5% of global GDP.[3] The study found that "China was the biggest subsidizer in 2013 ($1.8 trillion), followed by the United States ($0.6 trillion), and Russia, the European Union, and India (each with about $0.3 trillion)."[3] The authors estimated that the elimination of "subsidies would have reduced global carbon emissions in 2013 by 21% and fossil fuel air pollution deaths 55%, while raising revenue of 4%, and social welfare by 2.2%, of global GDP."[3] According to the International Energy Agency, the elimination of fossil fuel subsidies worldwide would be the one of the most effective ways of reducing greenhouse gases and battling global warming.[4] In May 2016, the G7 nations set for the first time a deadline for ending most fossil fuel subsidies; saying government support for coal, oil and gas should end by 2025.[13]
