Home battery backup systems
Which whole-home battery we'd buy, and what it costs.
Read moreYour Guide to the Clean Energy Revolution
Explaining solar, wind, and clean energy breakthroughs, and how they impact your life.
Buying Guides
No BS energy products that help keep the lights on
Topics
Solar
Rooftop panels and utility-scale solar farms.
8 articlesWind
Why wind turbines keep getting bigger, on land and at sea.
5 articlesNuclear
How safe reactors are, and what the new designs promise.
5 articlesGrid & storage
How power gets from the plant to your plug.
14 articlesOil & gas
Oil and gas, from the wellhead to the pump.
12 articlesClimate & policy
The science of warming and the treaties that followed.
12 articlesHome energy
Backup power and a warmer, cheaper house.
11 articlesNew fuels & tech
Electric cars, hydrogen, biofuels and carbon capture.
12 articlesRecently updated
All articles
Updated
Does battery energy storage undercut the energy return of wind and solar?
Battery energy storage is scaling fast on the US grid. What a 2014 net-energy argument got wrong, what's changed, and what batteries still can't do.
Updated
How many nuclear power plants are in the US? (2026)
The US has 94 operating nuclear reactors at 54 power plants in 28 states, EIA counted in March 2026. A plant is…
Updated
How much water do data centers use?
US data centers consumed 66 billion liters of water on site in 2023, mostly to cool servers, and the power plants behind…
Updated
How many data centers are in the US? (2026)
The US has about 1,400 to 2,300 operating data centers, by the count of the two trackers that publish a national total:…
Updated
The first electric car dates to the 1830s, but sources name different inventors
The first electric car is hard to pinpoint to one inventor or country, says the Department of Energy, but a Groningen museum…
Updated
What an EV battery costs, and how long it lasts
An EV battery is a pack of lithium-ion cells that stores the electricity an electric car drives on, and packs cost an…
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