How to use this calculator
Model energy from array size and sunlight hours. Enter array rated power (kw), peak sun hours per day, days, system losses (%). The result updates when you change an input. To compare two sets of inputs, save scenario A, then enter the second set; the result panel shows the difference.
Formula and limits
kWh = array kW × equivalent peak sun hours/day × days × (1 − loss/100). Illustrative estimate, not a site-specific solar forecast.
Worked example
The following example uses the calculator’s starting values. It is an illustration of the method, not a recommended target.
| Input | Example value |
|---|---|
| Array rated power (kW) | 5 |
| Peak sun hours per day | 4 |
| Days | 30 |
| System losses (%) | 15 |
Estimated kWh: 510
Interpreting your result
Enter local prices, equipment ratings, and emissions factors where required. Sample factors are illustrative. Real usage, weather, and equipment efficiency can change the result.
Comparing alternatives
Save the first result as scenario A, then change one input. The comparison shows the numeric difference; it does not label either result as better. Choose inputs that describe realistic alternatives. Values shown on screen are rounded, so calculations from rounded intermediate results may differ slightly.