Since the invention of the modern silicon solar cell, the performance of solar cells has improved greatly. On April 25, 1954, Bell Labs showed a silicon solar cell to the public for the first time. It had an efficiency of about 6%, meaning that it was able to convert about 6% of the sun’s energy it collected to electricity.

This was a huge improvement over the selenium solar cell, which had been the most common type prior to the introduction of the silicon solar cell. Selenium solar cells only converted about 0.5% of the sun’s energy.

Most research on solar cells since that time has focused mainly on increasing efficiency and reducing manufacturing costs. It’s proven to be possible, using exotic materials, to produce cells with up to 40% efficiency. The production cost for these cells is over 100 times greater than that of the current standard, 8% efficient cells. Reducing production cost may be even more important than improving efficiency in relation to the goal of encouraging more homeowners to switch to solar power.

The total amount of power delivered by the sun under ideal conditions is about 1,000 watts per square meter. This figure is the standard for defining the performance of a specific solar cell. Dust, pollution, elevation, temperature, weather and other variables can have an effect on sunlight intensity. Volcanic eruptions and other similar occurrences can reduce sunlight worldwide for over a year. Solar cells used at a higher elevation generally produce with superior efficiency. This is due to the fact that, as elevation gets higher, the air gets thinner, and the effects of dust and pollution are decreased.

Multicrystalline solar cells are now commercially available, and these output at about 14-19% efficiency. However, as mature technology, this type of cell is thought to be approaching its limit in terms of production capability. Instead, many researchers are more excited about amorphous silicon cells, which are currently about 8% efficient.

Even without any major improvements in solar cell efficiency, the goal of replacing fossil fuel-based power production with solar power is within reach. A little more than 10,000 square miles of land would have to be dedicated to solar panels in order to generate all of the electricity currently produced in the United States. Even now, there is enough unused desert in the US to meet this requirement.

Solar power systems, in order to provide power even when the sun isn’t shining, need to also involve some form of power storage. Many power companies are investigating“smart grid” systems involving the use of battery banks to address this issue. Even during the day, when solar panels are generating electricity, batteries can help with the task of meeting high demand, at times when many people are using their air conditioners.

Since the invention of the first solar cell, solar cell efficiency has improved dramatically, from 0.5% to as high as 40%. In the last few years in particular, they’ve also become a lot more affordable.

If you want to install your own solar power system, you must think about the kind of roof panel that you are going to utilize. More information about roof solar panels is available at Roof Solar Panels.

For the finest guides to building your own solar panels, including detailed instructions and step-by-step videos, go to Build Solar Panel and GreenDIY Energy Review.

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