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Why the US power grid is under strain
NERC, the nonprofit that oversees North American grid reliability, now expects summer peak demand to climb by more than 224 gigawatts over…
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Why banks finance fossil fuels
Banks finance fossil fuel companies because oil, gas and coal producers borrow and sell bonds like any other big company, and in…
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How much maintenance do solar panels need
Most home solar systems keep at least 80% of their original power output after 25 years, the US Department of Energy says,…
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How to improve solar panel efficiency
Solar panel efficiency is the share of sunlight a panel turns into electricity, and residential panels sold in 2026 typically run from…
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How solar inverter efficiency works
A solar inverter's efficiency is the share of the panels' DC power that comes out the other side as usable AC power,…
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How offshore wind power works
Offshore wind power comes from turbines standing in the ocean or floating above it, and the world had 92.5 gigawatts of it…
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Japan’s offshore wind buildout is years behind its own targets
Japan wants 10 GW of offshore wind running by 2030, building toward 30 to 45 GW by 2040. It had only 253.4…
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How efficient are wind turbines
No wind turbine turns all of the wind's energy into electricity, and physics caps that share at 59.3% of the wind's kinetic…
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Should utilities own power plants again?
Exelon wants states to let utilities own power plants again, pointing to a $329.17 per megawatt-day capacity price for 2026/2027, the highest…
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What Germany’s nuclear phase-out did to emissions and coal
Germany shut down its last three nuclear reactors on April 15, 2023, and for most of the decade after Fukushima, the power nuclear used to supply went mostly to coal, not to wind and solar.
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