Battery Equivalent Full Cycles Calculator

Convert raw energy throughput data into equivalent full cycles to understand how hard your battery asset is working. Enter total MWh processed and usable capacity to compute EFCs, average monthly and daily cycle cadence, and net delivered energy after efficiency losses.

Sum of charge or discharge energy delivered over the analysis window.
Nameplate capacity multiplied by allowable state-of-charge window.
Defaults to 12 months to derive monthly and daily cycle rates.
Defaults to 90%. Used to estimate delivered energy after losses.

Cycle counts are averages. Validate against high-resolution SCADA data and vendor analytics before making warranty or dispatch decisions.

Examples

  • 1,850 MWh throughput, 5 MWh usable capacity, 12 months, 90% efficiency ⇒ Equivalent full cycles: 370.00 cycles • Average cycles per month: 30.83 • Average cycles per day: 1.01 • Net energy delivered after 90.00% efficiency: 1,665.00 MWh (losses 185.00 MWh) • Analysis window: 12.00 months.
  • 820 MWh throughput, 3.2 MWh capacity, 9 months, defaults for efficiency ⇒ Equivalent full cycles: 256.25 cycles • Average cycles per month: 28.47 • Average cycles per day: 0.94 • Net energy delivered after 90.00% efficiency: 738.00 MWh (losses 82.00 MWh) • Analysis window: 9.00 months.

FAQ

Should I use charge or discharge energy for throughput?

Use whichever side your analytics track consistently. If you only have discharge data, enter that and set the efficiency to 100% so the net energy matches the measured value.

How do I compare EFCs to manufacturer warranties?

Manufacturers often cap warranties at a maximum number of equivalent full cycles. Compare the calculator output to the warranty threshold to see how much headroom remains.

Can I estimate degradation from the EFC result?

Pair the EFC tally with your degradation curve (e.g., percentage fade per 1,000 cycles) to approximate remaining capacity. This calculator focuses on cycle counting only.

What if my project operates less than a full month?

Enter fractional months such as 1.5 to keep the average cycle rates aligned with partial-month operations.

Additional Information

  • Equivalent full cycles (EFCs) divide total throughput by usable capacity, normalizing partial cycles into full-charge equivalents.
  • Monthly and daily cadence assume 30.4375 days per month (average days per month over a year).
  • Efficiency-adjusted energy highlights how much MWh actually reaches the grid or load after conversion losses.
  • Use EFC tracking to benchmark warranty terms, augment degradation forecasting, and align maintenance intervals with actual usage.

Related calculators