Solar Panel Efficiency Guide: What the Specs Mean in Real Life
Efficiency % explained
Lab efficiency compares output to area under STC. Field yield depends on orientation, shade, and climate—Orange County's sun helps, coastal marine layer hurts slightly in June.
Temperature coefficient
Panels lose output when hot. Premium modules with better temperature coefficients produce more on August afternoons.
Bifacial and large format
Commercial bifacial arrays gain reflected light; residential roofs rarely justify bifacial premium. Large-format 710W modules are the residential parallel—more watts per mount.
Real-world yield
Trust installer production guarantees tied to monitored weather data, not brochure efficiency alone. free solar quote includes site-specific modeling.
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