This virtual power plant storage duration calculator turns operational or financial assumptions into a transparent planning estimate for a virtual power plant. Enter values that describe your own portfolio, review the main result and supporting metrics, and use the formula section to confirm how each input is applied. The tool runs entirely in your browser and is intended for early-stage comparison, budgeting, and scenario review rather than contractual settlement or final engineering design.
Deliverable energy = flexible energy × efficiency × (1 − reserve rate)
Duration = deliverable energy ÷ dispatch power
Duration estimates how long the portfolio can sustain the entered dispatch power using its deliverable flexible energy.
Real dispatch may be constrained by device limits, customer opt-outs, state of charge, and rebound effects.
200 MWh at 90% efficiency with 10% held in reserve leaves 162 MWh. At 50 MW, duration is 3.24 hours.
Yes. Replace the defaults with values from the same operating period and keep every unit consistent.
Use the share of capability expected to be available when requested. Do not apply it twice if another input already includes outages or opt-outs.
Zero is accepted where it represents no energy, events, incentives, cost, or reserve. A denominator such as capacity, duration, or required performance must be greater than zero.
Enter percentages as displayed values, such as 90 for 90%. The calculator converts them to decimals internally.
No. It is a transparent planning estimate and does not capture every contract, network, behavioral, financing, or operational constraint.
| Variable | Unit or role |
|---|---|
| Flexible energy | MWh |
| Dispatch power | MW |
| Efficiency | Percent delivered |
| Reserve | Percent held back |