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Electric planes: Fantasy or reality?

December 1, 2023 By EarthWise Leave a Comment

Airplanes have been around for over a century, but the idea of powering them with electricity rather than with liquid fuels has been little more than a fantasy.  Over the years, billions of dollars have been invested trying to make electric planes practical.  In recent times, progress on battery technology has provided a much-needed boost for the field.

Electric planes are nowhere near becoming competitive with long distance commercial aircraft.  The weight and power requirements for such craft are far beyond what electric plane technology can do.  But electric planes could offer a very practical solution for transporting relatively small numbers of passengers over relatively short distances.

A plane built by the well-funded private company Beta Technologies has flown as far as 386 miles on a single battery charge.  The company envisions such planes to be mostly used for trips of 100 to 150 miles.  These planes could open new opportunities, like better connecting rural areas that have little or no direct air service.

Their latest model was tested on a trip between Burlington, Vermont and Florida, making multiple stops and flying through congested airspace over Boston, New York, and Washington.

Commercial versions of the planes will likely have lift rotors to take off and land like helicopters, making them deployable in a wide range of places.  Many companies are working on electric aviation, and they have backers like major automakers, major airlines, and large investment firms. 

Electric planes are not likely to replace conventional aircraft but are likely to have a meaningful impact how we move goods and services and reconnect rural parts of the country.

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Electric Planes, Once a Fantasy, Start to Take to the Skies

Photo courtesy of Beta Technologies.

Earth Wise is a production of WAMC Northeast Public Radio

Ever Cheaper Solar Power | Earth Wise

May 14, 2021 By EarthWise Leave a Comment

The cost of solar panels continues to decline

The price of electricity from solar panels has been dropping dramatically over the last decade.  The average cost of utility-scale solar power has gone down more than 80% since 1980, making it the least expensive power source in many places.  The plunging price of solar power is one of the driving forces behind the transition to clean energy. 

The 2020 average cost of solar power was 4.6 cents per kilowatt-hour.  The Department of Energy has recently set a target of reducing the cost of solar power by more than half again by 2030, to an unsubsidized average of 2 cents per kilowatt-hour.  The 2-cent goal is not just the ordinary cost of electricity; it is the levelized cost of energy which is based on a formula that includes the cost of construction and operation of a power plant.

If the least expensive power source becomes that much cheaper, it will really shake the foundation of many energy debates.  One of these debates is how to meet the need for more interstate power lines to transport renewable energy from rural areas to population centers.   If large amounts of additional renewable energy sources are added, policymakers will need to work harder to reform the regulatory system to make sure that new interstate power lines get built.

If the average cost of solar power reaches 2 cents a kilowatt-hour, the actual price will be lower in sunnier regions and higher in those that get less sun.  However, the continuing decrease in solar electricity costs will actually have the greatest impact in the northern, less sunny regions, because solar power may not currently be the least expensive option there but it will become the cheapest alternative over time.

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Inside Clean Energy: What Happens When Solar Power Gets Much, Much Cheaper?

Photo, posted May 14, 2020, courtesy of Courtney Celley/USFWS via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

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