You will never, never, never hear about such problems from renewables advocates. The
term renewables advocate almost always refers to husters who are totally lacking in intellectual integrity. The renewables advocates are selling green myths that have little basis in facts. In fact the community that supports renewables is a bunch of off-the-wall fairyland-based champions of unreality. Not only do they ignore obvious facts, but the offer the most gossamer of excuses for doing so. No pro-renewables argument is ever so ludicrous, or illogical that it isn't instantly bought by the entire crowd of pro-renewable idiots lock, stock and barrel.
For example renewables advocates point to a study by Stanford "researchers" Cristina Archer and Mark Z. Jacobson titled "Supplying Baseload Power and Reducing Transmission Requirements by Interconnecting Wind Farms. The claim is made that Archer & Jacobson demonstrate that Wind can provide practical base power. But Archer & Jacobson actually say that windmills at 19 highly selected locations in Oklahoma, Texas, Kansas and New Mexico, if linked, can be counted on to produce at least 21% of their rated power 81% of the time. This system would seem to possess some but not all characteristics of base generation capacity. Its down time cannot be scheduled to reflect low power demand, as true base power can. A glance at the Archer & Jacobson data set reveals huge weakness for the system. The system has no ability to produce electricity during daily peaks of summer electrical demand. Thus as electrical demand rises during the summer days, electrical generation drops sometimes to virtually nothing. Thus the so-called wind base generation system fails to provide electric when it is needed the most.
Finally, since "base" capacity is 21% of name plate capacity, the real cost of of "base" electricity is 5 times the cost of "nameplate" rated capacity. Thus if 1f a 1 MW electrical generator costs $2 million the cost of base capacity will be 5 x $2 million or $10 Million. This price comes in at the high end of nuclear range and the whole system is less capable than nuclear, since it can be counted on to not deliver electricity during periods of peak demand. Thus careful attention to Archer & Jacobson, far from revealing the advantages of wind, actually testify to its weaknesses.This you are never going to hear from renewables advocates, who were either too lazy to look carefully and critically at the Archer and Jacobson study, or who are not smart enough to figure out the problems on their own. Indeed Archer and Jacobson do not focus on the enormous cost of their wind-based system or its inabiliy to produce electricity during periods of summer peak demand. But this sort of sloppy scholarship is the sort we have come to expect from California fairy-land renewables scholarship.