Hi Miguel,
There is a description of the PV Smoothing battery dispatch algorithm in the Battery Dispatch topic of SAM's Help system:
samrepo.nrelcloud.org/help/battery_dispatch_fom.htm.
PV smoothing outpower is the desired output power of the PV-battery system, not the actual power. The actual power is "electricity to grid," which in this case is the same as "system power generated."
If you are seeing more ramping than you expect, you may need to adjust some of the dispatch parameters, such as maximum ramp rate, correct up-ramp violations, and ramp timestep multiplier (to set the ramp rate interval).
Best regards,
Paul.