Understanding Pumped Hydro Cycle Efficiency
How we calculate. Cycle % = generation from storage ÷ pumping energy × 100. See our methodology and accuracy policy .
Real-world scenario: A typical Pumped Hydro Cycle Efficiency case uses energy out (mwh) 780 and energy in (mwh) 1000. Enter the same figures below to reproduce the worked path.
What is Pumped Hydro Cycle Efficiency?
A hydro storage KPI analogous to battery RTE but for pumped storage plants. Distinct from capacity factor and heat-rate efficiency.
- Same cycle set
- Energy in = pumping MWh
- Energy out = generating MWh from storage
The Formula
Worked Example
Common Use Cases
- Pumped storage reviews: cycle losses
- Dispatch models: storage efficiency
- Asset comparisons: vs BESS RTE
Pro Tips
- Align pumping and generating over same cycles
- State metering point (bus vs machine)
- Pair with capacity factor for utilization
| Scenario | When to use |
|---|---|
| Percent of a number | Finding a part of a whole (tax, tip, score) |
| Percent change | Comparing old vs new values |
Limitations: Pumped Hydro Cycle Efficiency results are educational energy and utilities planning aids—not engineering, grid-operations, or investment advice. Confirm definitions with your ISO/RTO, plant, and regulatory reporting standards.
Common mistakes
- Swapping part and whole: The denominator must be the full total, not a subset.
- Rounding too early: Carry extra decimal places through multi-step work before rounding the final percent.
- Mixing percent and decimal forms: Enter rates in the format the calculator labels expect.
The worked example for pumped hydro cycle efficiency was verified with the calculator form on this page—enter the same values to confirm the result.
When to use this calculator
- Use this page when your wording matches pumped hydro cycle efficiency and the form labels on screen.
- Use percent of a number for “what is X% of Y?” problems.
- Use number is what percent when you know part and whole and need the percent.
Still unsure about pumped hydro cycle efficiency? Start with the quick answer above, then open the linked calculator that matches your wording.
❓ Frequently Asked Questions
How do I use this pumped hydro cycle efficiency calculator?
For pumped hydro cycle efficiency, enter the values labeled on the form, then press Calculate. Compare the result to the worked example on this page.
What formula does this page use?
See the quick answer and formula box above for pumped hydro cycle efficiency—the same percentage calculator expression is applied to your inputs.
What if my result looks wrong?
When checking pumped hydro cycle efficiency, re-check part vs whole (or rate vs base), rounding, and whether percents were entered as 25 rather than 0.25 when the form expects percents.
Authoritative References
For power system and plant performance concepts, consult: