PaintBased Solar Cells Capture Sustainable Electricity Interview with Prof. Ted Sargent
The sun is this incredible vast resource. We get more sun reaching the Earth's surface every day than we need to power the entire world's energy needs. In fact, in an hour, we get enough to meet our energy needs for a year it's that abundant. But if you look out there and think how we actually today meet our energy needs, it's not using the sun by a large margin at all we use fossil fuels. And so my group is committed to trying to solve the technological problem that underlies that. The technological problem is not that.
We can't make efficient solar cells, it's that we can't make solar cells at the moment that are sufficiently lightweight, convenient, low in cost, and efficient simultaneously to make solar energy capture economically compelling. So we're going to reduce the cost of solar electricity. The economic impact will really be had when we can tell customers that they can get solar electricity for a lower cost than if they bought electricity off the grid that was produced through using, say, coal or nuclear. So our technology is based on making an ink that.
Can be synthesized in solution so it's a liquid, it's a paint and can be applied from the solution phase using rolltoroll processes just the way you print newspapers, but where that ink, now that it's absorbing light, is playing this dual role of absorbing sunlight and turning it into electricity efficiently. We picture a world in which solar cells are so convenient. They're on a carpet that you can roll out onto your roof, or they're on a decal that you can stick on the side of a streetcar, you can stick on your car, you can stick on your airplane wing. They're.
Are Solar Panels Going To 300 Watts Soon
Right now solar panels are around the 200 watt range. Are they ever Going To 300 Watts is a question I asked John Shaw project engineer of Bella Energy. Absolutely, any manufacturer can do that right now. You shouldn't really look at how many watts a panel has rather how many watts per square foot can be attained. Behind you is a Sanyo 200, if you increase the foot print of that panel by 50 it is a 300 watt panel. The reality is what you need to be looking at to measure the level of progress of the.
Technology is how many watts per square foot. Instead of thinking will there ever be a 300 watt panel surely there will be even next year. To get at the point of your question is do you ever think we will be ever to achieve a 300 watt panel in 15 square feet And yes, I do. Right now standard efficiency panels are in the ballpark of about 12 watts per square foot, it ranges from 10 to 13. Standard efficiency panels Evergreens, Sharps, Kyocera, Shot , Suntech etc. Keep in mind this is the residential affordable panels, NASA works with panels that are about.
30 watts per square foot but you are talking a million bucks a panel. Then there are high efficiency panels of the ones we know of are SunPower and Sanyo. And Sunpower and Sanyo are approximately 15 watts per square foot. Both are very good products. Sanyo I believe has a little bit of an edge because they has an amorphous or thin film rap around the silicon cell which allows them to maintain high production in high heat. One more reason and I will tie this in. The Sanyo's are shipped with a minus 0 and a plus 5 percent so when you buy a 200 watt.
Sanyo panel you will get hypothetically in standard test conditions 75 degrees at sea level you will get 200 watts or up to 210 watts. All other panels including specifically Sunpower are or 5, so you could buy a 210 watt Sunpower cell and it could actually perform at 199 watts where you could buy a 200 watt Sanyo cell it could perform at 210 watts, but no less than 200 watts. So that and the fact the Sanyo's will out perform Sunpower apples to apples same azimuth and pitch in high heat because of this amorphous or thin film rap 10 in high heat peak days.
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We get asked about the battery question almost on every job, and we tell them to wait. And I tell them there's some really exciting technologies that are coming down the pipe. There's flow batteries, potentially, high energy density flow batteries. There's nanotech enhanced lithium ion that's coming. There's liquid salt batteries that are coming. There's a number potentially, ultracapacitors. Batteries have a bad reputation, but what we're working on are supercapacitors, and supercapacitors you can think of as a charge storage device like a battery, except it charges and discharges 100 to 1000 times faster.
A supercapacitor is one which combines the best attributes of both. If you think about all the electronic devices you have, right now, every time you need one, you realize, oh, I forgot to charge it up. But imagine if you could take that same device, plug in the wall for 30 seconds or a minute, and be ready to go. There's a number of really exciting battery technologies all competing to fill the super battery space, or the battery of the future the battery that can power your whole house, last for 10 to 20 years, and not cost you too much.
That battery's coming, and it's not quite here yet. Cost of lithium ion has dropped precipitously over the last several years, but it's not quite there yet. And so we tell our customers to wait. The day will come, and it's not too many years in the future when you'll be able to power your life off of solar, not just during the daytime when the sun's shining, but also at night. You'll be able to put a battery in your garage that's the size of a refrigerator that'll run your whole house for a couple days.
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Solar PV Tile Roof
Good morning and welcome to one of Ecoelectric's solar information specials. Today were looking at rooftop installations considerations. This is a tile system installed onto what is a north west face over here 3.54kW and over here on the north east we have another 2.5 or so kW. This system is just under 7kW in total and we will just have a look at how it has been installed on the roof. You can see that its using a fairly standard rail mount system. I believe this is an old version of Grace rail its certainly not Antai which.
Were using at the moment. Its fairly typical of a tile mount system you can see that the tile brackets here come out from underneath the tile and as you can see on this roof the tile sits quite nicely on the bracket without any grinding of the tile itself. We dont reccommend that the tile are ground in unless you see a decent gap on the edge of your tile. If this gap is too high then sometimes they do need to be gound. You can also see here the.
Earthing attachment to the rail. Stainless steel all 100 compliant. The interesting thing though is that even stainless steel you can still see slight corrosion on the edge which gives you an idea of what can happen if people use non stainless galvanised or even worse zinc plated type earthing arrangements they simply wont last. Here is a typical cable penetration its a decktie. As you can see it hasnt been screwed to the tile underneath that is a 25mm penetration. The decktie has literally been put down with sealent.
In this case it looks like a clear sealent has been used. We actually reccommend colored sealant as it has a higher tensile rating when it bonds to the tile. Were using grey Sikaflex. Under here you can see a decent gap there are a lot of plastic cable ties which are no longer to spec but when this system was installed that was perfectly ok. Its is a fairly neat job there are no cables hanging on the roof and there is a good airgap there for heat to move out from underneath the solar system. You can also see that the.
Solar Energy Panels an Alternative Energy Source Save Money with Solar Energy Rebates
Imagine harnessing the power of the sun to reduce your utility bills. Despite the large initial investment, solar energy panels are a green renewable energy source that can add value to you home and reduce your energy costs paying for themselves over time. This is your Union Plus Green Minute and I'm here to tell you how to go green and save green at the same time. By installing solar energy panels to generate your own electricity, you can save between 400 and 700 dollars a year. You can also install a solar powered.
Water heater and save hundreds more. On sunny days when no one is home, you might generate more electricity than you use. Your meter will run backward and your utility will actually owe you money. Solar energy panels for your home are not as expensive as they seem because you'll get a 30 percent federal tax credit. Most people recoup their investment in eight to twelve years, though that depends on where you live, how much sun you get, what your utility rates are, and other factors. And that's not all. If you use your Union Plus credit card to pay for energy efficient.
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