If you got your solar the performance monitoring is a OCD thing right?

So here is a list of the best sites (IMO) for  doing the solar calculations.

This follows this article
Performance calculations — RenewSolar

sun and shade tracking ( angles)
www.solarcalc.org

Weather (clouds)
Weather Map: Precipitation - The Weather Network

astro - Sun rise and fall alt for solarcalc great for data over time.
https://www.timeanddate.com/astronomy/

irradiance - Solar Irradiance - calculate the solar energy available on your site (solarelectricityhandbook.com) ( handy panel angle calc)

any more and why??