<div dir="ltr">It's a bad idea.<div><br></div><div>This project has popped up on quite a few sites that I frequent, and I've answered similarly to all of them:</div><div> - The energy used to manufacture them and install them is very very close to the amount you get out of them over their operating life</div>
<div>For a normal solar panel, it's energy payback time is about 7-8 years, a third of it's life. For a solar road compared to a normal panel: </div><div> - Shorter cell life (Wear and tear from driving)</div><div>
- Lower cell efficiency (because it's flat, and scratches)</div><div> - Higher manufacturing energy costs (as it needs to be stronger to counter the first point)</div><div> - Higher installation energy costs (as there can't be seams, and existing roads must be pulled up)</div>
<div>Using some approximations I figured that solar roads would have only a slight energy saving compared to just using fuel (Energy Payback was 11-13 years of a 15 year life). Put in terms of money, it's not worth it.</div>
<div><br></div><div>So I doubt we'll see them anytime soon. Maybe when fuel goes up in price.</div><div><br></div><div>Geoffrey</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, May 25, 2014 at 11:15 PM, Peter Ellens <span dir="ltr"><<a href="mailto:ellensp@gmail.com" target="_blank">ellensp@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi.<br>
<br>
Off topic, but interesting.<br>
<br>
You guys that know a lot about solar, what do you think of these solar roads ideas<br>
<a href="https://www.indiegogo.com/projects/solar-roadways#home" target="_blank">https://www.indiegogo.com/<u></u>projects/solar-roadways#home</a><br>
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