Quantcast
Environmental News for a Healthier Planet and Life

Help Support EcoWatch

There Are 68.4 Million Better Places for Solar Panels Than Mr. Trump's Wall

Popular
There Are 68.4 Million Better Places for Solar Panels Than Mr. Trump's Wall
SolarWorld

By John Rogers

President Trump on Tuesday suggested putting solar panels on his infamous border wall to help pay for it (since Mexico certainly won't). While there are more things wrong with that proposal than I can cover in this space, it's great to see that President Trump has finally figured out solar panels are cost-effective energy investments, paying for themselves even if you ignore the many environmental benefits. But here are more than 68.4 million better places for President Trump to invest in solar to pay dividends for the American people.


Solar on the roof

The U.S. National Renewable Energy Laboratory (NREL) last year published a fine study of the potential of America's rooftops to host solar. The researchers analyzed how much solar photovoltaic (PV) capacity we could get overhead, from existing buildings (considering roof orientation, tilt and shading), and calculated what it would add up to.

One conclusion of that analysis was that "83 percent of small buildings have a suitable PV installation location," and that more than a quarter of the total roof area of those buildings could work. NREL is careful to say that that's the technical potential, not necessarily what would make sense in other regards. But if we take that 83 percent, and consider the number of stand-alone, single-family houses, you end up with 68,380,764 million (give or take a few million) places to put solar.

As it happens, a lot of those sunny rooftops are near our beautiful southern border: In most Texas zip codes, for example, more than 90 percent of the small buildings might work for solar.

Source: Gagnon et al. 2016

From a technical potential point of view, residential rooftops across the country could meet a big chunk of household electricity needs in a lot of states: More than 90 percent in a dozen states, and at least 70 percent in 27 states.

Source: Gagnon et al. 2016

Solar on more roofs

But wait, there's still more: Note that NREL's "small buildings" doesn't just mean detached single-family homes. If we add in duplexes and small apartment buildings, that would mean millions more rooftops for solarizing.

And then there's plenty of roof space beyond small buildings: commercial, industrial and institutional roofs. NREL found that "more than 99 percent of large and medium buildings" have some place that would work for solar ("at least one qualifying roof plane"). And the total rooftop area that would work is much higher than for small buildings (very few trees shading the middle of a big-box store roof…). Their calculations suggest potential on around half of the total roof area of medium buildings, and two-thirds of large ones.

If you take the rooftop potential across the various size buildings (which, unlike walls in the middle of deserts, are already connected to the electricity grid), and compare it even to the total electricity needs in each state, you find that it really adds up (particularly in states and cities that are serious about energy efficiency).

Source: Gagnon et al. 2016

Solar on the ground

Plus, roofs are definitely not the only place suitable for solar. The latest solar stats show that the progress of large-scale solar, done by utilities and others, has been even more impressive than residential and commercial ("non-residential").

Source: GTM-SEIA Solar Market Insight, 2016 Year in Review

And large, ground-mounted solar arrays don't just make sense in fields, farmlands and deserts. Old landfills or "brownfields"—lands that have been degraded by past industrial activity—can be a great fit for new solar capacity. (The same could be true for solar at old power plant sites, where the plants have shut down but the infrastructure and grid connection are still there.)

Larger arrays can also be the foundation of community solar systems, a way of making solar work for people who can't or don't want to do it on the roof.

Solar in reality

So enough of the frivolous flights of folly in trying to use solar's overwhelming popularity to make a wildly unpopular project slightly less unpopular. A border wall might need solar, but solar certainly doesn't need a border wall.

Solar is real, and it makes sense. And we already have plenty of places to put it, if President Trump would just put his office and budget to good use for moving American energy forward.

John Rogers is a senior energy analyst with expertise in renewable energy and energy efficiency technologies and policies at the Union of Concerned Scientists.

EcoWatch Daily Newsletter

Atlantic puffins courting at Maine Coastal Island National Wildlife Refuge in 2009. USFWS / Flickr

When Europeans first arrived in North America, Atlantic puffins were common on islands in the Gulf of Maine. But hunters killed many of the birds for food or for feathers to adorn ladies' hats. By the 1800s, the population in Maine had plummeted.

Read More Show Less
Rescue workers dig through the rubble following a gas explosion in Baltimore, Maryland on Aug. 10, 2020. J. Countess / Getty Images

A "major" natural gas explosion killed two people and seriously injured at least seven in Baltimore, Maryland Monday morning.

Read More Show Less
The recalled list includes red, yellow, white and sweet yellow onions, which may be tainted with salmonella. Pxhere

Nearly 900 people across the U.S. and Canada have been sickened by salmonella linked to onions distributed by Thomson International, the The New York Times reported.

Read More Show Less
Methane flares at a fracking site near a home in Colorado on Oct. 25, 2014. WildEarth Guardians / Flickr

In the coming days, the U.S. Environmental Protection Agency (EPA) is expected to use its power to roll back yet another Obama-era environmental protection meant to curb air pollution and slow the climate crisis.

Read More Show Less
Researchers on the ICESCAPE mission, funded by NASA, examine melt ponds and their surrounding ice in 2011 to see how changing conditions in the Arctic affect the biological and chemical makeup of the ocean. NASA / Flickr

By Alex Kirby

The temperature of the Arctic matters to the entire world: it helps to keep the global climate fairly cool. Scientists now say that by 2035 there could be an end to Arctic sea ice.

Read More Show Less
President Vladimir Putin is seen enjoying the Opening Ceremony of the Sochi 2014 Winter Olympics in Sochi, Russia. Pascal Le Segretain / Getty Images

Russia's Health Ministry has given regulatory approval for the world's first COVID-19 vaccine after less than two months of human testing, President Vladimir Putin said on Tuesday.

Read More Show Less

Trending

A John Deere agricultural tractor sits under a collapsed building following a derecho storm on Aug. 10, 2020 near Franklin Grove, Illinois. Daniel Acker / Getty Images

A powerful series of thunderstorms roared across the Midwest on Monday, downing trees, damaging structures and knocking out power to more than a million people.

Read More Show Less