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“Wind and solar are going to be the backbone of the growth in renewables, but whether or not they can provide 100% of the U.S. electricity without backup is something that engineers are debating,” said Brown University’s Porder. …
This presents challenges for engineers and policy-makers, Porder said, because existing energy grids were built to deliver power from a consistent source. Renewables such as solar and wind generate power intermittently. So battery storage, long-distance transmission and other steps will be needed to help address these challenges, he said.
Has anyone read the last sentence? This is the untold problem. How do you store solar power when the sun goes down? A few car batteries will not work for an entire city. Something that can store energy without exploding, polluting, or otherwise destroying humanity. Has anyone come up with a working gigawatt storage solution? If so, what? We may want to have a solution before we turn off our overnight and consistent power source.
The wind doesn’t set with the sun.
But more seriously, economics will drive the outcome. Daytime consumption is far above night, and existing fossil power plants will stay online until they’re not profitable.
And no, the real backup – nuclear – isn’t going to explode, pollute, or destroy humanity.
“Our overnight and consistent power source” is killing the planet, but never mind.
in addition to lithium-ion, lead acid, and sodium batteries, molten salt can also store solar energy. pumped hydro storage has been paired with nuclear units for decades but is geographically limited. proposals are advancing to use abandoned coal mines/shafts as pumped hydro sites. energy vault shows some promise for “gravity batteries.” but green hydrogen is probably the holy grail. ultimately, more transmission is necessary to unlock renewable energy’s potential.