Solar projects are getting more reliable over time
Solar projects are getting more reliable over time
Newer solar power projects are degrading more slowly than older ones, according to research from the US Department of Energy. The finding, published in the Journal of Renewable and Sustainable Energy, demonstrates how photovoltaic technology in solar panels has improved over time, and could help investors in new solar projects better understand long-term risk.
There are a variety of factors that influence how quickly photovoltaic cells degrade in efficiency and performance. "Most photovoltaic module manufacturers warrant that their modules' performance won't degrade by more than a certain percentage, for example, losing 0.5% per year, during a 25-year period," Bolinger says. "But module degradation is only part of the story, because the other components of a utility-scale photovoltaic system – the inverter, tracking system, fuses, wiring – can also negatively affect output."
Because the study focuses on system-level risk rather than the individual photovoltaic cells themselves, Bolinger says it offers a more holistic and realistic estimate of the long-term risk for potential investors in new solar projects.
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