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performance ratio

NREL’s performance ratio method applied to thousands of PV systems

Researchers have analyzed the monthly performance ratio of 8000 PV installations distributed across the United Kingdom by using the calculation model of the U.S. National Renewable Energy Laboratory. They measured, in particular, thermal impact on the performance ratio (PR) and found that Spring and Summer seasons have higher monthly PR compared to Autumn and Winter.


How performance warranties protect revenues

Contracts to build solar PV plants usually contain a performance warranty to ensure that the owner receives an asset that delivers the agreed-upon minimum performance level. But can warranties and assessment methodologies guarantee that plant performance is being correctly assessed? The answer is not entirely straightforward, writes Felipe Canto Teixeira, a partner at Everoze.


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