Given that very little stationary battery capacity exists to back up renewables in Texas (as shown in the chart above), this means wind fails to deliver when the capacity is most needed, which is a common issue with wind in general. ![]() The other big problem ERCOT experiences during the heat of Texas summers is that the wind tends to die down as demand on the system peaks in the late afternoon. ![]() Lake, who resigned as PUC chairman on June 2 after some of his legislative priorities were rejected by the state legislature, said at the time, “On the hottest days of summer, there is no longer enough on-demand dispatchable power generation to meet demand on the ERCOT system.” Lake added that the shortage has come about since 2008, as power generators in the state have chosen to add just 1.5% of additional thermal capacity while the state’s population grew by 24%.
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