- Posts: 2
Battery Cycle Counting
- Tanatip
- Topic Author
04 Dec 2025 02:17 #14402
by Tanatip
Battery Cycle Counting was created by Tanatip
Hello,
I am modeling a PV + BESS project using the manufacturer's degradation curve.
System details: 400 MWh capacity / 100 MW PCS.
The Issue: I am seeing a large discrepancy in cycle counts. My system throughput is roughly 100 MWh/day, which implies ~0.25 Equivalent Full Cycles (EFC) per day. However, SAM reports approx. 45 cycles for the first month (approx. 1.5 cycles/day).
Question: I understand SAM uses the Rainflow cycle counting algorithm. Is it normal for the Rainflow method to produce a count this much higher than a standard throughput calculation?
Appreciate your advice in advance.
I am modeling a PV + BESS project using the manufacturer's degradation curve.
System details: 400 MWh capacity / 100 MW PCS.
The Issue: I am seeing a large discrepancy in cycle counts. My system throughput is roughly 100 MWh/day, which implies ~0.25 Equivalent Full Cycles (EFC) per day. However, SAM reports approx. 45 cycles for the first month (approx. 1.5 cycles/day).
Question: I understand SAM uses the Rainflow cycle counting algorithm. Is it normal for the Rainflow method to produce a count this much higher than a standard throughput calculation?
Appreciate your advice in advance.
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