Estimate storage duration for a offshore wind project using transparent, editable assumptions. The calculator turns project capacity, energy, performance, or cost inputs into a clear primary result plus supporting figures for planning and comparison. It is intended for early-stage screening, scenario checks, and communication—not as a substitute for a site-specific engineering, resource, tariff, or financial study. Adjust every field to match the same asset boundary and reporting period.
Duration = nameplate MWh × usable depth × discharge efficiency ÷ discharge MW
Required nameplate MWh reverses the same formula using the target duration.
Duration indicates how long the storage system can sustain the selected power under the entered usability and efficiency assumptions.
Planning estimate only. Verify assumptions with site-specific technical, commercial, and financial analysis.
With 200 MWh, 90% usable depth, 95% discharge efficiency, and 50 MW output, delivered energy is 171 MWh and duration is 3.42 hours.
It is the time usable stored energy can sustain the selected discharge power, after applying the entered usable depth and discharge efficiency.
Enter nameplate energy and use the usable-depth input to model the permitted portion.
Not all stored energy reaches the load. The calculator applies discharge efficiency to estimate delivered energy.
The required-nameplate result shows the energy capacity needed for the selected power and target duration.
No. Add an engineering margin or reduce usable depth to account for aging, temperature, and operating reserves.
| Variable | Effect on duration |
|---|---|
| Nameplate energy | More energy increases duration |
| Discharge power | More power reduces duration |
| Usable depth and efficiency | Reduce energy available to the load |