Annual solar yield & measured energy comparison
Estimate annual energy from a supplied specific yield, then compare measured energy over the same year. This comparison is not the irradiance-normalised performance ratio (PR).
Enter your assumptions and select Estimate.
Method & assumptions
Estimated annual energy = system size × annual specific yield. Use a site-specific yield from a simulation or justified benchmark that already includes expected system losses. The measured comparison is measured energy ÷ estimated energy for the same period and metering boundary.
A technical PR assessment also needs in-plane irradiation and a consistent reference definition. Discuss a solar performance assessment or browse the tools.