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Temperature does have an adverse effect on solar panel performance, primarily on the cells' open-circuit voltage. Voltage reductions in solar cells increase linearly as temperature increases. Maximum temperature ratings for panels vary by manufacturer and solar cell materials. Most solar panels are rated to withstand temperatures between 150 and 190 degrees Fahrenheit. As an example, the operational temperature range for an REC Solar AE-Series 220-Watt panel is between -40 and +80 degrees Celsius (max 176ºF).
Temperature ratings also vary by material. Open-circuit voltage for an average crystalline silicon solar cell is about 0.50% per degree Celsius. The same rate for amorphous silicon cells is between 0.20-0.30% per degree Celsius, depending on how the solar cell is made. On the contrary, the current generated by a solar cell increases slightly with an increase in temperature. However, the negative change in voltage is stronger than the positive change in current, so the overall effect of high temperatures on solar cells and panels is considered a negative one.
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Phill Ricord January 13, 2009 To Whom It May Concern: As a home owner who has lived off the grid for well over 20 years I am pleased to Recommend Daniel Tittmann to anyone seeking assistance in designing, purchacing, installing or repairing alternative energy systems and/or components. In 2007 he was part of a team who upgraded our home’s existing solar and hydro-electric system to meet our ever expanding need for alternative power. Daniel Worked diligently and methodically to ensure that our system was professionally installed and left us with a sense of confidence that he would be there for us when we needed service or advice. Later when we decided to install solar electric water pumping system tie into our existing photovoltaic system, Daniel did it all. He designed, purchased and installed a low wattage pump that allowed us t break free from our dependence from our gas driven pump. He showed up on time, as scheduled and went out of his way to be certain that we were satisfied. When, through our own negligence, the pump failed due to inadequate filtration, Daniel promptly serviced the pump and returned it to service. Daniel and his company Greenwired Solar Solutions, is our “go to guy” when it comes to alternative energy solutions. His rates are reasonable, he is trustworthy and punctual. If he is unsure, he seeks help. He is easy to work with and his earned my respect and my business. Please feel free to contact me for further info if you wish at 707 442 6620 Phil Record President Wildberries Marketplace Since this letter was written I have installed and serviced a second electric pump, a solar system on a guest house/ studio as well as fixing a hydroelectric system.
Thorough and profession installers.