Although some of the evidence presented in this chapter is experimental (i.e., based on incomplete measurements over limited time spans and limited climatic ranges), the
Category: The variability of solar energy resources

It has long been found that the total (relative) variability of paralleled solar generators (or wind generators) is less than that produced by a single

Weather and cloud movements cause fluctuations in solar energy resources on short time scales ranging from seconds to tens of minutes. see picture 1. Sun