About the Specific Yield
Specific yield is the energy a solar plant produces per unit of installed capacity (kWh per kWp) over a period. It is the headline productivity metric that normalizes plants of different sizes for a like-for-like comparison.
Formula
Specific yield (kWh/kWp) = Annual energy (kWh) ÷ Installed capacity (kWp)
- Annual energy
- Metered generation over the year (kWh)
- Installed capacity
- DC rating of the array (kWp)
Worked example
A 100 kWp plant generating 1,55,000 kWh in a year has a specific yield of 1,550 kWh/kWp — typical for much of India, where good sites deliver 1,400–1,700 kWh/kWp/year.
What you can calculate
- kWh/kWp metric
- India benchmarks
- Grade rating
- PPA guidance
Standards & references
Frequently asked questions
What is a typical specific yield in India?
Most Indian locations deliver 1,400–1,700 kWh/kWp/year for fixed-tilt systems. High-irradiance states (Rajasthan, Gujarat) sit at the top; tracker-mounted plants can exceed 1,800 kWh/kWp/year.
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