Understanding Pumped Hydro Cycle Efficiency
How we calculate. Cycle % = generation from storage ÷ pumping energy × 100. The form uses the same arithmetic as the worked examples on this page. 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
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.
FAQ
Same as battery RTE?
Same ratio shape (out÷in), different asset class. Use the battery RTE page for BESS and this page for pumped hydro.
What if energy in is 0?
Cycle efficiency is undefined—enter positive pumping energy.
Authoritative References
For power system and plant performance concepts, consult: