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Solar Energy Yield Estimator
Estimate energy yield and self-consumed electricity value from entered equivalent sun hours.
Array rated power (kWp), Equivalent full-sun hours per day, Combined yield loss (%), Number of days, Avoided electricity price per kWh, Energy consumed on site (%)
JSON
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the labelled values using the displayed units and explicit assumptions.
- Choose Calculate result and review the complete report and any undefined or no-solution states.
- Choose Download result to save the complete JSON. Reset clears the result and restores example controls.
Examples
Array rated power (kWp): 5
Equivalent full-sun hours per day: 4
Combined yield loss (%): 20
Number of days: 365
Avoided electricity price per kWh: 0.3
Energy consumed on site (%): 70
Limitations
- Nonnegative array kWp,equivalent full-sun hours/day0–24,loss0–100%,whole days0–36600,nonnegative electricity price, self-consumed share0–100%. Simple DC-rating*sun-hours*net-efficiency model. No weather/location lookup,export tariff,inverter clipping,financing or performance guarantee.
- Scalar controls accept explicit finite decimal syntax;positive values normally1e-12–1e12,nonnegative0–1e12 unless a narrower range is stated. JSON numeric rows use finite IEEE754 values within their stated bounds. Derived counts above1billion and nonfinite results refuse. Combined input<=400000UTF8 bytes;complete JSON<=4MiB. All processing stays in your browser.
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