Category Archives: Photovoltaic Solar

Want to go off-grid? You might need hundreds of Tesla batteries

Posted on February 4, 2018 by

Preface. Although you may not be as far north as Victoria, British Columbia (48.4 latitude), you’d ideally want to be at 30 degrees or less latitude from the equator to even consider the expense of off-grid solar power.  And even … Continue reading →

Posted in Batteries, Photovoltaic Solar | Tagged , , | 11 Comments

Why is nearly all solar power built where subsidies are the highest?

Posted on October 8, 2017 by

If solar net energy return is as high as some solar advocates claim, why does solar need any subsidies? And not just U.S. subsidies, it’s subsidies on top of subsidies when you add in that we’re buying Chinese government subsidized … Continue reading →

Posted in Concentrated Solar Power, Energy Policy, Photovoltaic Solar, Solar EROI | Tagged , , , , , , | 9 Comments

Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 2

Posted on January 26, 2017 by

[ Pedro Prieto presented an update on June 20, 2017 at the International Society for Biophysical Economics “Spain’s Solar Revolution Revisited: six years later” here: Pedro-Prieto_ISBPE_2017-Spains-solar-revolution-revisited.pdf.   See the pdf for more information Losses in book overestimated and revised Before / … Continue reading →

Posted in Charles A. S. Hall, EROEI Energy Returned on Energy Invested, Pedro Prieto, Photovoltaic Solar, Solar EROI | Tagged , , , | Comments Off on Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 2

California could hit the solar wall

Posted on September 18, 2016 by

[ According to a Stanford University article below this introduction (followed by excerpts from two California Energy Commission reports), if California uses mainly solar power to meet a 50% Renewable Portfolio Standard (RPS), on sunny days, for most of the … Continue reading →

Posted in Photovoltaic Solar, Renewable Integration | Tagged , , , | 6 Comments

Net metering and the death of US rooftop solar

Posted on August 29, 2016 by

April 22, 2016 by Roger Andrews at euanmearns.com “Net metering” allows anyone with a solar installation to sell surplus solar power to the grid when the sun is shining and to purchase power back from the grid when it isn’t. … Continue reading →

Posted in Other Experts, Photovoltaic Solar | Tagged , , , | 9 Comments

Solar PV cells using rare elements unlikely to scale up enough to replace fossil fuels

Posted on July 16, 2016 by

[ Sunshine may be free, but the materials to make solar contraptions aren’t.   Since sunshine arrives in a diluted form (2500 kWh/m2), vast expanses of solar photovoltaic panels will be needed to produce the world’s 15 Terawatts of power that … Continue reading →

Posted in Alternative Energy Resources, Limits To Growth, Photovoltaic Solar, Rare Minerals | Tagged , , , , , , , | Comments Off on Solar PV cells using rare elements unlikely to scale up enough to replace fossil fuels

Will perovskite solar cells ever work out?

Posted on May 12, 2016 by

Van Noorden, R. September 24, 2014. Cheap solar cells tempt businesses. Nature #513 470-471. [Excerpts. Of interest because rarely do obstacles get mentioned in the news. Most are optimistic hype making it sound like a solution to the energy crisis … Continue reading →

Posted in Photovoltaic Solar | Tagged , , | 1 Comment

Tilting at Windmills, Spain’s disastrous attempt to replace fossil fuels with Solar PV, Part 1

Posted on October 31, 2015 by

Book review by Alice Friedemann at energyskeptic of “Spain’s Photovoltaic Revolution. The Energy Return on Investment”, by Pedro Prieto and Charles A.S. Hall. 2013. Springer. Conclusion: the EROI of solar photovoltaic is only 2.45, very low despite Spain’s ideal sunny … Continue reading →

Posted in Alternative Energy, Alternative Energy Resources, Charles A. S. Hall, Debt, Electric Grid, Energy, EROEI Energy Returned on Energy Invested, Pedro Prieto, Photovoltaic Solar, Solar, Solar EROI | Tagged , , , , , , , , | 26 Comments

Would Tesla, SolarCity or SpaceX exist without $4.9 billion in government subsidies?

Posted on June 5, 2015 by

[ Tesla has made no new battery breakthroughs. Batteries aren’t much better today than they were 200 years ago.  All Tesla did was build a better battery management system (BMS) by stringing teeny-tiny batteries together — thousands of them.  But … Continue reading →

Posted in Debt, Lithium-ion, Photovoltaic Solar, Subsidies | Tagged , , , , | Comments Off on Would Tesla, SolarCity or SpaceX exist without $4.9 billion in government subsidies?

Pedro Prieto: many solar panels won’t last 25-30 years, EROI may be negative

Posted on April 18, 2015 by

See my review of “Spain’s Solar Revolution” for background on what follows: Our study concluded that, when analyzed what we called “extended boundaries energy inputs”, about 2/3 of the total energy inputs were other than those of the modules+inverters+metallic infrastructure … Continue reading →

Posted in Pedro Prieto, Photovoltaic Solar | Comments Off on Pedro Prieto: many solar panels won’t last 25-30 years, EROI may be negative