When looking at the efficiency of solar panels, it’s important to differentiate between the optimal performance generated in a lab, the potential performance of new and developing technology, and real-life solar panel efficiency. Because as logical as that may sound, if you do any reading online, or even wander into a showroom where some new technology is proudly on display, you may get caught up in the razzle-dazzle of the shiny and new.
Because of the relative high cost of solar panels, many manufacturers and seed companies are trying to develop new solar panel technology. There have been some interesting developments in this area, some of which are on the market now. This includes thin film solar panel technology. Other developments include creative ways to develop a solar panel without using solid ingots of silicon. Solid ingots of silicon are the source of the high cost of solar panels, as they are relatively scarce.
So, you’ll find companies exploring the use of different materials, as in thin film solar technology, in the search for the most efficient solar panel. Or others that use silicon, but in smaller amounts. One company is developing a solar panel that uses strips of silicon to transform sunlight, and other material to funnel the sunlight into the silicon. There are question marks on how efficient these will remain over the lifetime of a solar panel. All solar panels lose some efficiency over time, but using plastic, that is much less durable, to collect and funnel the sunlight means it is less likely to last as long.
However, if you want efficient solar panels, you should invest the extra money and get panels made from solid ingots of silicon. These are by far the most efficient when it comes to energy output. And they are very long lasting. They are usually guaranteed for 25 years, although they should last 30 or 40.
If you’re trying to save money you could always try getting second hand solar panels. Solar panels last a long time, and retain their efficiency for decades. Even after 20 years only a small fraction (around 10 percent) of the efficiency of solar panels is lost. Some industrial locations will sell their used solar panels at a reduced rate, and this can be a good source of cost-effective, efficient home solar panels. The reason for this is because industrial applications require maximum efficiency and so they get rid of used panels which would still work perfectly for residential applications.
Solar Panel Efficiency Video
The science behind silicon solar panels
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