I’m talking about the future of solar panels. The cost of solar power is getting cheaper (1), and some estimates say that it could be practically free by 2030 (2). In fact, even now solar and wind facilities are now the least expensive option for new power worldwide, except in Japan, according to Bloomberg NEF, a consultancy firm (3). There are some places where solar power won’t be very useful, of course. For example, cars. In terms of physics, solar panels wouldn’t provide energy at a low enough cost to be worthwhile for powering cars, despite many efforts by car manufacturers (4). Solar Roadways also aren’t as viable as they seemed at first glance, as they don’t generate as much power as advertised, nor enough to compensate for the price of installation (5). But there have been other recent innovations and developments in solar panels and solar energy that should make further dependence on solar energy more viable.
Let’s start small and move on to bigger news as we go. In some areas, like in boroughs of New York, there are a lot of renters or low-income residents. Due to their financial status, using solar energy isn’t very viable for them. Or at least, it wasn’t. There have been start-ups for community solar energy. A solar farm will be placed in the community, and residents can pay a subscription fee to be hooked up to the grid, a fee that could replace their electricity bill. If these people can’t place solar panels on their home, for whatever reason, they can take advantage of this community solar power (6). Moving on to California, a state which has a goal of 100% solar energy by 2030, has a mandate that requires all new homes to have solar panels installed, thus normalizing getting solar energy (7).
Remember when I said that solar power couldn't provide enough energy to power a car? Well, it can’t, not on it’s own. But Hyundai is installing solar panels on some of their cars to augment the internal combustion or hybrid engine. This can improve fuel efficiency of the vehicle (8). There’s also an electric vehicle by Sion that has a 155-mile range, and with the solar panels on top that can charge it, an extra 18 miles are added to that. Expected to be available in the second half of 2019, it will be priced similarly to traditional cars (9).
After the last hurricane in Puerto Rico, the power grid was going down on a regular basis. A firefighter from Las Vegas, wanting to do some good, decided to take a small solar system down and give it to a fire station in one of the poorest region, so they could make use of it when the power went down. He found later that they were using the solar system all the time. Since the grid went down frequently, they couldn’t afford to be down at any moment. This shows that, provided the money and the infrastructure could be installed, solar power could end the hazardous power outages after hurricanes, outages that continue to plague Puerto Rico (10).
Another really cool thing that renewable energy can help - wind and solar in particular - is with desertification. Computer models have shown that having solar and wind power can increase rainfall and reduce temperature, thus reducing desertification. As climate change continues, desertification is going to continue to be a problem. Having a potential solution could buy us some time to mitigate the impacts of climate change (11).
One issue that we’ve been having with solar panels is recycling them. In order to make solar panels cheaper, manufacturers have been reducing the amount of silver in them. This makes them more difficult to recycle, since the silver was valuable and thus desired by recyclers. And while it’s cheaper to put them in a landfill than to recycle them, in some places, it’s illegal to dispose of solar panels in a landfill (12). Most solar panels have a lifespan of 25-30 years, so we have a little time to come up with a recycling method, but cheap ones made in China have only a 5-year lifespan (13). Researchers at Case Western Reserve University have been working on a longer-lasting solar panel, with a lifespan of 50 years, by decreasing the degradation of the materials. Hopefully, we will find a method of recycling solar panels, but having them last longer gives us more time to work on that problem (14).
Solar farms require a lot of land in order to generate a worthwhile amount of power, but this also contributes a lot to the cost of solar farms. Land is particularly expensive, and some land might also be good for crops or other uses. So there’s a new method that involves installing solar panels on water. This means that land can still be used for other purposes, prevents excess evaporation of water sources due to high temperatures, solar panels can be installed more quickly - on land, the land has to be flattened before panels can be placed - and they work well in tandem with hydroelectric plants. During times of drought, the solar panels still provide energy, and when it’s cloudy or rainy, the hydroelectric plant can still produce energy (15).
There have been a number of developments in kinds of solar panels that are particularly exciting. My personal favorite is flower-shaped, and has a lot in common with flowers, the least of which is appearance - it does resemble a flower. The fixture also follows the sun through the sky, thus collecting 40% more solar energy than traditional panels. Also like a flower, it folds up at night or when it’s dangerously windy. it’s also portable, so you can put it on the back of your electric vehicle and charge it with the fixture (16). Then there are what’s called solar trees, now installed at the Kennedy Space Center Visitor Complex. There are five trees there, with 60 solar panels each. Not only do they provide power, their design means they can easily be integrated into urban landscapes. And for the Kennedy Space Center visitors, they provide a chance for people to learn about solar energy up close and personal (17). There’s also been a development in organic solar cells. Rather than being made of silicon, these cells are made of carbon and plastic. This makes them cheaper. They’re also flexible, paper thin, and have similar efficiency rates to traditional silicon panels (18). There are also solar cells made out of a material called perovskite, which can be found in the Earth’s mantle as well as produced in a lab. By making solar panels out of perovskite, this makes them flexible and thin, similar to the organic ones. This means that we can put them in more places, including in our clothes, meaning we can generate more energy (19). In some ways, producing these thin, lightweight solar technologies may be more expensive, but it can also improve logistics. The Navy in particular hopes that they can save lives - soldiers carry a lot of weight in supplies. If they can reduce that weight with thin solar panels, soldiers could move faster (20).
The last significant development I want to talk about is in storing solar energy. Generating solar energy is cheap and easy, but usually more energy is produced than is needed at that moment, so it needs to be stored. Storing that energy has been a bit of an engineering problem. So one solution has been storing solar energy as a liquid. One such battery achieved record efficiency in early October (21). The way it works is, the sunlight energy heats up the liquid in the battery. This changes the chemical bonds. These bonds store the energy even at room temperature. By using a catalyst, this energy can be released any time it’s needed, and it can be stored for more than a decade (22). Just recently, MIT engineers have conceived of a design for a system that could store renewable energy, called “Sun in a Box” (23). This system could conceivably deliver stored energy back into a power grid of a small city, for example, on demand.
The way it stores this energy is as heat.
While the “Sun in a Box” idea was conceived of this month (December), this method of storing solar energy as heat has been explored earlier in the year. It used to be more expensive to store solar energy as heat, but in late October, they started to use a ceramic-metal composite, called cermet , that was used by the Air Force after World War II. In order to store energy this way, the sun hits what’s essentially a giant magnifying glass, which focuses sunlight on the cermet, heating it to 550 degrees, which for reference is on the cooler side of lava. As it cools, the energy is stored in another form (24). There’s also a new composite material, made of ceramic and tungsten, that is stable up to 750 degrees Fahrenheit, meaning that even more heat energy can be gathered (25).
As a summary, in the future, I think that communities will become more and more dependent on even small-scale solar farms, like the community solar mentioned in New York. Getting power from solar will become far more the norm, especially as solar panels become cheaper. I also think that getting this power will exist in both the panel form and the heat energy form. On a small scale, storing solar energy in liquid batteries is perfect. It works just fine and can provide enough energy on that smaller scale - small being a relative term. But on a larger scale - the city or state scale, as well as large research laboratories like CERN - storing that energy as heat will be far better. And a method for recycling solar panels is certainly in the works, and should be more than ready by 2100.
Whatever happens, society will have to become more dependent on renewable energy. Fossil fuels are going to run out - they are by definition non renewable. When it comes time to fill the gap that will open up as we get closer to exhausting our fossil fuel reserves, solar power is more than ready, and more than sufficient, to fill that gap.
1.) Rogers, John. “The Price of Large-Scale Solar Keeps Dropping.” Union of Concerned Scientists. N.p., 14 Sept. 2018. Web. 8 Dec. 2018. <https://blog.ucsusa.org/
john-rogers/large-scale-solar-gets-cheaper>
2.) Cook, Josie Rhodes. “Renewable Energy Could Basically Be Free by 2030, According to New Analysis.” Inverse. Inverse, 13 Aug. 2018. Web. 8 Dec. 2018. <https://www.inverse.com/article/48017-by-2030-renewable-energy-costs-will-be-effectively-zero-says-ubs-researcher>
3.) Geman, Ben. “Why Solar Is Getting Even Cheaper.” Axios. N.p., 20 Nov. 2018. Web. 8 Dec. 2018. <https://www.axios.com/solar-wind-renewable-energy-costs-down-6b3bc87f-b1f9-47a0-b965-e74f3764a5e5.html>
4.) Coren, Michael J. “The Physics of Why We Don't Have Solar-Powered Cars.” Quartz. Quartz, 15 Oct. 2018. Web. 8 Dec. 2018. <https://qz.com/1423288/why-dont-we-have-solar-powered-cars-physics/>
5.)Ryan, Dylan. “Solar Panels Replaced Tarmac on a Road -- Here Are the Results.” The Conversation. The Conversation, 24 Sept. 2018. Web. 8 Dec. 2018. <https://theconversation.com/solar-panels-replaced-tarmac-on-a-road-here-are-the-results-103568>
6.) Calma, Justine et al. “Solar Power Isn't Just for the Rich (Anymore).” Mother Jones. N.p., 9 Sept. 2018. Web. 8 Dec. 2018. <https://www.motherjones.com/environment/2018/09/solar-power-isnt-just-for-the-rich-anymore/>
7.) Chappell, Bill. “California Gives Final OK To Requiring Solar Panels On New Houses.” NPR. NPR, 6 Dec. 2018. Web. 8 Dec. 2018. <https://www.npr.org/2018/12/06/674075032/california-gives-final-ok-to-requiring-solar-panels-on-new-houses>
8.) Gustafson, Sven. “Hyundai, Kia to Put Solar Panels on Vehicle Roofs.” Autoblog. Autoblog, 31 Oct. 2018. Web. 8 Dec. 2018. <https://www.autoblog.com/2018/10/31/hyundai-kia-solar-roof-panels-official/>
9.) NowThis News. “Sion EV Electric Car Uses Solar Panels To Charge As You Drive.” NowThis. NowThis News, 11 Aug. 2018. Web. 8 Dec. 2018. <https://nowthisnews.com/videos/future/sion-ev-electric-car-uses-solar-panels-to-charge-as-you-drive>
10.) Leber, Rebecca et al. “Power Outages during a Hurricane Can Be Deadly. Solar Could Fix That.” Mother Jones. N.p., 24 Sept. 2018. Web. 8 Dec. 2018. <https://www.motherjones.com/environment/2018/09/power-outages-during-a-hurricane-can-be-deadly-solar-could-fix-that/>
11.) Stevens, Alison Pearce. “Renewable Energy Might Be Able to Green a Desert.” Science News for Students. N.p., 26 Nov. 2018. Web. 8 Dec. 2018. <https://www.sciencenewsforstudents.org/article/renewable-energy-might-be-able-green-desert>
12.) McMahon, Jeff. “Innovation Is Making Solar Panels Harder To Recycle.” Forbes. Forbes Magazine, 4 Sept. 2018. Web. 8 Dec. 2018. <https://www.forbes.com/sites/jeffmcmahon/2018/09/04/innovation-is-making-solar-panels-harder-to-recycle/>
13.) Chen, Angela. “More Solar Panels Mean More Waste and There's No Easy Solution.” The Verge. The Verge, 25 Oct. 2018. Web. 8 Dec. 2018. <https://www.theverge.com/2018/10/25/18018820/solar-panel-waste-chemicals-energy-environment-recycling>
14.) Scott, Mike. “Making Solar Panels That Last Half a Century.” The Daily. Case Western Reserve University, 30 Oct. 2018. Web. 8 Dec. 2018. <https://thedaily.case.edu/making-solar-panels-last-half-century/>
15.) Geuss, Megan. “Floating Solar Is More than Panels on a Platform-It's Hydroelectric's Symbiont.” Ars Technica. Ars Technica, 3 Nov. 2018. Web. 8 Dec. 2018. <https://arstechnica.com/science/2018/11/floating-solar-is-more-than-panels-on-a-platform-its-hydroelectrics-symbiont/>
16.) Barber, Megan. “Flower-Shaped Solar Panel Now Sold in the U.S.” Curbed. Curbed, 11 Sept. 2018. Web. 8 Dec. 2018. <https://www.curbed.com/2018/9/11/17845638/solar-panel-power-smartflower-united-states>
17.) Tuttle, Brittani. “Kennedy Space Center Visitor Complex Unveils Solar Trees to Showcase Renewable Energy.” Attractions Magazine. N.p., 28 Nov. 2018. Web. 8 Dec. 2018. <https://attractionsmagazine.com/kennedy-space-center-solar-trees/>
18.) Shen, Alice. “Organic Solar Battery Sets Record for Converting Sunlight to Energy.” South China Morning Post. South China Morning Post, 13 Aug. 2018. Web. 8 Dec. 2018. <https://www.scmp.com/news/china/society/article/2159495/organic-solar-battery-sets-record-converting-sunlight-energy>
19.) Urry, Amelia. “Thin, Flexible New Solar Cells Could Soon Line Your Shirt.” Wired. Conde Nast, 19 Nov. 2018. Web. 8 Dec. 2018. <https://www.wired.com/story/thin-flexible-new-solar-cells-could-soon-line-your-shirt/>
20.) Fialka, John. “Solar Industry's Future Lies in Lightweight Technology.” Scientific American. N.p., 30 Nov. 2018. Web. 8 Dec. 2018. <https://www.scientificamerican.com/article/solar-industrys-future-lies-in-lightweight-technology/>
21.) “Solar Cell, Married to Liquid Battery, Achieves Record Efficiency.” Science and Technology Research News. N.p., 3 Oct. 2018. Web. 8 Dec. 2018. <http://www.scienceandtechnologyresearchnews.com/solar-cell-married-to-liquid-battery-achieves-record-efficiency/>
22.) Miley, Jessica. “Scientists Develop Liquid That Can Store Solar Energy For More Than a Decade.” Interesting Engineering. N.p., 6 Nov. 2018. Web. 8 Dec. 2018. <https://interestingengineering.com/scientists-develop-liquid-that-can-store-solar-energy-for-more-than-a-decade>
23.) Chu, Jennifer. “'Sun in a Box' Would Store Renewable Energy for the Grid.” Scienmag: Latest Science and Health News. N.p., 5 Dec. 2018. Web. 8 Dec. 2018. <https://scienmag.com/sun-in-a-box-would-store-renewable-energy-for-the-grid/>
24.) Jeung, Tiffany. “A Hot-as-Lava New Composite Could Revolutionize Solar Energy Affordability.” Inverse. Inverse, 28 Oct. 2018. Web. 8 Dec. 2018. <https://www.inverse.com/article/50240-new-composite-for-large-scale-solar>
25.) Texas A&M University. “New Solar Panel Material Can Take More Heat.” Futurity. N.p., 4 Dec. 2018. Web. 8 Dec. 2018. <https://www.futurity.org/solar-panels-material-1923352/>