Essentially, just prior to the event, on a very sunny day, solar PV was supplying almost 60% of the electricity demand, and when combined with wind, made up almost 80% of the electricity generation capacity on the grid. At this point conventional generation, (fossil fuel-based electricity, as opposed to renewables) was providing just over 20% of capacity, and this fact (as we shall see later) is seen as one of the primary causes of the event. According to the chronology of ev