As Texas bakes under a this summer and people crank their air conditioners, the state鈥檚 energy demand has smashed records. But the power has stayed on and prices haven鈥檛 spiked tremendously.
Thank wind and solar, energy experts say.
鈥淩enewables have been performing very well this summer, which is great,鈥 Michael Webber, an energy expert and professor at the University of Texas at Austin, told CNN. 鈥淚t鈥檚 operating so well at peak times.鈥
As temperatures soared into the triple-digits on Wednesday, renewable energy was providing 30 to 40 per cent of the power the state needed, according to analysis of state data from Texas energy expert Doug Lewin.
And as the state struggled through an early heatwave in June, non-fossil fuel power including renewables and nuclear made up 55 per cent of total generation on June 28 and 29 and close to 50 per cent of the power needed during the evening peak, according to statistics from the federal Energy Information Administration.
Wind and solar have been working well in tandem, Webber said. Solar has been generating a lot of energy during the day when the sun is beating down, and wind has been performing well during the evening hours.
Renewables have been a lifeline for the Texas grid as some older thermal plants 鈥 which run on coal, natural gas, and nuclear 鈥 have gone offline throughout the summer, according to Texas energy expert Doug Lewin, founder of consulting firm Stoic Energy.
鈥淭he thermal plants have bounced up and down,鈥 Lewin told CNN, saying thermal plant outages during heatwaves have been high by Texas grid manager ERCOT鈥檚 own standards. 鈥淵ou have the thermal outages being consistent in that high level and renewables doing quite well throughout the summer.鈥
Despite some anti-renewable bills introduced in the Texas legislature this year, the state has been adding renewables 鈥 particularly solar 鈥 at an incredible clip.
The US Energy Information Administration estimates the Lone Star state will install more utility-scale solar capacity in 2023 than any other state, around 7.7 gigawatts this year alone. And the federal energy administration expects the state to bring another 24.8 gigawatts of additional solar capacity online by the end of 2025. Together, that鈥檚 enough to power over 10 million homes.
The state is also rapidly installing battery storage, to store wind and solar energy when the sun isn鈥檛 shining and wind isn鈥檛 blowing.
Solar is the new 鈥渄arling鈥 of Texas energy, Webber said, in large part because it鈥檚 cheap and far easier to install than constructing a new natural gas or nuclear plant.
鈥淚t鈥檚 the only thing you can build quickly enough,鈥 he told CNN. 鈥淭here鈥檚 no way last summer to this one we could have built a gas plant, a nuclear plant. It doesn鈥檛 need water cooling; it doesn鈥檛 need an air quality permit.鈥
Solar buildout is coming on the heels of a previous wind boom in Texas. The state has installed more wind capacity since 2019, but the wind buildout is slowing and solar is likely to soon eclipse it. However, there are early plans for offshore wind farms in the Gulf of Mexico, which could add more renewables to the state鈥檚 grid.
Natural gas remains an important part of electricity generation on the state鈥檚 grid, as well, and low natural gas prices combined with strong renewable performance has helped keep prices from spiking this summer, Webber said.
ERCOT officials expressed concerns about relying too much on renewables earlier this year, saying more natural gas plants should be built. But Lewin said that鈥檚 a misguided strategy, and this summer has shown renewables are a very important part of the grid鈥檚 resiliency during hot weather.
鈥淚 think what they鈥檙e leaving out is the intermittency of the thermal plants, they continue to neglect that,鈥 Lewin said. 鈥淭o represent to the public that if we just had more of these fossil fuel plants, everything would be fine, is ludicrous. That鈥檚 not to say renewables are a panacea, but the point is thermal plants are also not a panacea.鈥
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