Hacker News Reader

The European Commission also has a nifty tool for estimating PV performance: https://re.jrc.ec.europa.eu/pvg_tools/en/tools.html

Seems like it just use simple geo location and does not take dust and rain into account.

More sun but a lot of dust can be less efficient than less sun but no dust.

But, it is free and it is already done. It is a good tool to estimate what would be your gain from solar power.

And obviously one of the underrated advantages: It is not Google.