A good look at the variability of wind and solar resources in Texas, from @VibrantCE. They show that wind power can exhibit significant inter-annual variability, and some extreme years exhibit winter months with near-zero output from wind. This is rare, but happens.
https://twitter.com/VibrantCE/status/1364434290084208648
Solar exhibits less interannual & monthly/weekly variation than wind, but there is, of course, this thing called night. That said, batteries + solar can mitigate diurnal cycles well. So solar+storage can be counted on a bit more than wind it seems, with higher capacity value.
This variability needs to be accounted for in resource adequacy planning, including the potential for correlated extreme low wind events during periods of system stress.
So long as system planners/grid operators consider wind (and to a lesser extent solar, provided it is paired with sufficient storage) to be "reliably unreliable," as I called it in my @NYTimes op ed (nytimes.com/2021/02/18/opi…), electricity systems can be resilient to these extremes
PS, @VibrantCE, does the solar data account for snow/ice covering panels?
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