Build a transparent energy scenario.
Use your own assumptions to estimate annual renewable output and battery duration. Compare two scenarios and export a planning brief.
Annual matching is not hourly supply coverage. Storage does not add to renewable generation.
How the calculation works
Annual solar energy = solar MW × 8,760 × solar capacity factor ÷ 100. Wind uses the same relationship. Net annual output = combined gross energy × (1 − additional loss ÷ 100). Annual energy ratio = net output ÷ annual demand × 100. Battery duration = nameplate MWh × usable percentage ÷ 100 ÷ discharge MW.
The additional loss assumption is applied only once. If your capacity factors already include losses, set additional losses to zero. A zero-power battery has no defined discharge duration. This simple model assumes a 365-day year and constant average capacity factors; it omits seasonal and hourly variation, degradation, charge efficiency, prices and network limits.