I've had a Computerized Battery Analyzer (CBA) for many years now but have never used it to profile a solar panel. A short write-up on the process is available on West Mountain Radio's website. I've read it several times and had the process on my to-do list for some time now.
As you may be aware, there are two broad categories of solar controllers: Pulse Width Modulated and MPPT.
MPPT stands for Maximum Power Point Tracking and is the more efficient of the two types. Several factors determine the maximum power capable of being extracted from a given solar panel: mono- or poly-crystalline construction, temperature and load characteristics, to name a few.