Solar Energy

Don’t be a PV efficiency snob

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A common question I get when discussing solar photovoltaic (PV) power is: “What is the typical efficiency for panels now?” When I answer that mass-market polycrystalline panels are typically about 15–16%, I often see the questioner’s nose wrinkle, followed by dismissive mumbling that 15% is still too low, and maybe they’ll wait for higher numbers before personally pursuing solar. By the end of this post, you will understand why this response is annoying to me. At 15%, we’re in great shape: it’s plenty good for our needs.

A guide for the perplexed energy policymaker

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If you are an energy policymaker (or layperson interested in energy) and you are NOT perplexed by the last decade, read no further. You have little to gain from what I write below. However, if you are a perplexed energy policymaker (or perplexed layperson interested in energy), please continue and learn why poor quality data, lack of transparency, broad uncertainty and flawed thinking about risk have made it difficult for many experts and the public alike to think sensibly about our energy future.

Review: Life Without Oil by Steve Hallett With John Wright

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“Imagining a world without oil” describes in stark detail what might happen if one day the world decided to decommission all its oil tankers, rigs, pipelines and strategic reserves. The authors, environmental scientist Steve Hallett and journalist John Wright, expect that we’d initially see sky-high prices and long lines at pumps. After a few weeks, fuel wouldn’t be had at any price and even first-world citizens would struggle to stay fed and out of the elements. This is no Hollywood doomsday scenario—it’s a levelheaded extrapolation from current trends in the fast deteriorating world energy situation. [An essay prefiguring the book originally appeared in The Washington Post.]

The roads to our alternative energy future

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How fast do we need to transition off of fossil fuels? What industrial capacity is available today for different alternative energy technologies and what is likely to be available in the future? What might we do if we can’t replace fossil fuels with alternatives fast enough, and what might the consequences be? I finally got around to re-doing these calculations, and wanted to go through the numbers.

Renewable energy zealots must understand ‘Net Energy’

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Was I surprised that last issue’s column, Can Renewables Outshine Fossil Fuels?, elicited a strong reaction, with written responses of support and derision? Not at all. It’s an issue that continues to divide the environmental community, and one which keeps us from moving forward as quickly as possible to conserve resources and relocalize as an era of cheap, concentrated, easy-to-get energy comes to an end.

The bright future of solar powered factories

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Most of the talk about renewable energy is aimed at electricity production. However, most of the energy we need is heat, which solar panels and wind turbines cannot produce efficiently. To power industrial processes like the making of chemicals, the smelting of metals or the production of microchips, we need a renewable source of thermal energy. Direct use of solar energy can be the solution, and it creates the possibility to produce renewable energy plants using only renewable energy plants, paving the way for a truly sustainable industrial civilization.

Less heat, more light on peak oil

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“Because money talks and BS walks, if the hydrogen economy was an apprentice working for Donald Trump, it would’ve been fired in the first season.” This is just one of the pearls of wisdom from Transition Voice’s new “Snarky Guide to Peak Oil.” It’s got the facts you need to debunk energy myths and the attitude you need to defuse a heated discussion with a smile.

Can renewable energy outshine fossil fuels?

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I’m not popular with environmentalists when I tell them that renewables can only provide a small fraction of the energy that fossil fuels do in powering industrial civilization. In fact, I was recently called a liar at the screening of an anti-nuke film for suggesting so.