Rainflow-counting algorithm question

Hello,I am currently seeking clarification on the computation of cycling for the System Advisor Model (SAM) and the BatteryStateful module within the PySAM framework. Although this topic has been previously addressed, I remain uncertain about the specific methodology SAM employs to calculate cycles.My understanding is that the rainflow counting algorithm is utilized; however, I am aware that various versions of this algorithm exist, such as the three-point and four-point techniques. Could you please provide a detailed explanation or mathematical equation that elucidates the specific implementation of the cycling calculation within the SAM code (link provided: github.com/NREL/ssc/blob/892b81b46a66a81ed6d357bc802dd82318372c4b/shared/lib_battery_lifetime_calendar_cycle.cpp#L119 )?I appreciate your assistance in advance.

Hi Luis,

Please see the following posts for discussion on this topic and links to references:

sam.nrel.gov/index.php?option=com_kunena&view=topic&catid=5&id=1761&Itemid=487#5472

sam.nrel.gov/index.php?option=com_kunena&view=topic&catid=5&id=3829&Itemid=487#10798

sam.nrel.gov/index.php?option=com_kunena&view=topic&catid=5&id=2902&Itemid=487#7928

Best regards,
Paul.