Energy & Green Tech

Californians told not to charge EVs as grid struggles in heat wave

Californians were told Wednesday not to charge their electric vehicles during peak hours, just days after the state said it would stop selling gas-powered cars, as the aging electricity grid struggles with a fearsome heatwave.

Energy & Green Tech

Major leap for stable high-efficiency perovskite solar cells

Solar cells manufactured from materials known as "perovskites" are catching up with the efficiency of traditional silicon-based solar cells. At the same time, they have advantages of low cost and short energy payback time. ...

Energy & Green Tech

Why solar panels do not always live up to expectations

The need to switch to renewable energy sources such as wind and solar has never been more urgent. As the gas tap is slowly turned off, electricity becomes more and more expensive, and the effects of the warming climate are ...

Energy & Green Tech

'A necessity': Lebanon's forced conversion to solar

Thanks to solar energy, residents of the northern Lebanese village of Toula are finally able to enjoy ice cream again—a treat in a sun-baked country plagued by power cuts.

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Solar energy

Solar energy is the radiant light and heat from the Sun that has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar radiation along with secondary solar resources such as wind and wave power, hydroelectricity and biomass account for most of the available renewable energy on Earth. Only a minuscule fraction of the available solar energy is used.

Solar power provides electrical generation by means of heat engines or photovoltaics. Once converted, its uses are limited only by human ingenuity. A partial list of solar applications includes space heating and cooling through solar architecture, potable water via distillation and disinfection, daylighting, hot water, thermal energy for cooking, and high temperature process heat for industrial purposes.

Solar technologies are broadly characterized as either passive solar or active solar depending on the way they capture, convert and distribute sunlight. Active solar techniques include the use of photovoltaic panels and solar thermal collectors (with electrical or mechanical equipment) to convert sunlight into useful outputs. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.

This text uses material from Wikipedia, licensed under CC BY-SA