A Road Built Out Of Solar Panels, To Charge Our Cars (And Everything Else)

There are a lot of roads just sitting there in the sun, doing nothing with all that energy. Why not use them to collect it? All it takes is a massive re-engineering of what a solar panel can be.

Scott and Julie Brusaw have been working on their Solar Roadway—literally a road made of solar panels—for several years. And, now, they’re finally ready with their first full trial: a 12 by 36 foot parking lot in north Idaho, about an hour from the Canadian border. Funded with a $750,000 grant from the Federal Highway Administration, the 5,700-watt installation is set to be completed in April, and will be a key step in proving viability.

"We’ll have something to invite company owners to come and see," Scott Brusaw says. "They’ll be able to see all the features, and how the power runs straight into our electronics lab and powers the building."

The road is made of three parts: a hard-wearing translucent top-layer with the solar cells, LED lights (for road markings) and a heating element (to keep off snow and ice); an electronics layer to control lighting and communications; and a base plate layer that distributes power to nearby homes and businesses (and perhaps electric vehicle charging stations). Plus, there’s a channel at the edge to collect and filter run-off water (including anti-freeze and other chemicals that normally leeches into the ground). The trial will test three types of PV: mono- and poly-crystalline, and thin-film.

Brusaw says a solar panel on the ground is likely to generate less power than one on a roof, because the ground can’t be pointed at an optimum angle to the sun. But the point is there is a lot more ground around than roof-space, and putting panels down, rather than up, is easier. He hasn’t calculated how expensive a solar road might be compared to asphalt—though he guesses it might be three times as much.

The big draw of the solar road, potentially, is that the panels end up paying for themselves, and that the energy can be used for all sorts of useful things, like powering lights, and rest-stop amenities. There’s a possibility to feed EV charging points, and even to charge cars as they travel down the road. (Brusaw has talked with a company developing a wireless charging infrastructure). "Theoretically, you could never run out of juice," he says.

First, though, the Brusaws have to prove the parking lot works, and start manufacturing their first commercial panels (possibly in 2014). If they get that far, it’s likely we’ll see the first solar roads, and parking lots, in cold and remote places. A highway that clears itself of ice and snow would be a big draw in the winter time.

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  • Tyler

    Might be expensive upfront, but asphalt actually costs more over time due to filling pot holes, snow removal, maintenance, etc.  I say great idea and look forward to a rational proof of concept / outcome!

  • Shane Henrik Lamminparras

    "He hasn’t calculated how expensive a solar road might be compared to asphalt--though he guesses it might be three times as much."
    Absolutely ridiculous. How do people like this even get publicity. It's been said a million times already to do solar charging from roads, this guy is no different.

  • Rafi Mamalian

    This is an awesome idea.  Endless possibilities.  Once a grid is in place, you could theoretically get the vehicle to communicate with the road.  This not only means power-on-the-go for your electric vehicle, but would also makes it possible for cars to drive themselves using the information that the road gives it.

  • iUnplug

    This is an awesome idea.... Instead of just pointing out any flaws this idea may have, you should try and think of helpful solutions to those flaws and share them....

  • Bueller

    How slick does it get in rain?  Does it store power for cloudy winter days?  How is it going to melt ice under its power if the sun is obscured by thick clouds? Just curious

  • Sharonsloan129

    I hadn't thought of how slick it would get, but it could have battery packs buried in the ground to store energy for ice/snow melting. My cousin has solar panels on the roof. We are in cloudy Northern Ireland and he pays £60 a year for his electricty. We pay around £500 a year, so the panels work on cloudy days. Maybe there is a way to have a make the top layer 'gritty' like a non-slip tile? It would be an excellant idea for a driveway.You could gather power all day and charge your electric car during the night.