Every solar panel has its own production profile depending on the type of solar panel you have (monocrystalline, aka “mono”; polycrystalline, aka “poly”; and thin-film are three main forms). Locate your specific solar panel on the manufacturer’s website under “product support,” and download the warranty provisions if they’re still available. Then, find the clause for the performance or power limited warranty. (Don’t confuse the performance warranty with the product defect warranty, which typically guarantees the equipment for 10 to 12 years.) Most companies offer solar panels with a performance warranty of 25 or 30 years. Mono and poly panels will lose a significant amount of performance the first year (known as the “burn-in period”), then gradually taper off indefinitely. Most thin-film modules won’t experience a significant first-year performance drop, but they’ve historically been lower-wattage modules with much lower cell efficiencies.
Forerunners in Residential Green Property Appraisals
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Green Real Estate Appraiser 