Solar panels are DC beasts and as such it is voltage that takes precedent.
I realize this really isn't an active thread now, but I was reading back thru some of the older stuff under leisure and saw this...
A of J, you're correct with this provided the context you used later in the post is present.
However - PV is a current source, not a voltage source. A single solar cell is really nothing more than an oversize diode that is optimized to catch light. The current that any given cell passes is proportional to the amount of light caught.
I wanted to clarify for future readers of this thread that if a single cell of any given size is placed in series with a larger cell, and exposed to equal quality and quantity of incident light, the current will be limited to the Isc rating of the smaller cell, absolute best case.
You can also think of this another way: Take two identical cells and place them in series, equal quality/quantity light, just as above, and partially shade one of the cells. The current that will pass thru the shaded cell will roughly approximate that of a completely exposed cell the same size as the unshaded area. This of course then scales right up, as the typical panel is a single string of identical cells (not always, but that's another story and really has no bearing as far as this goes).
One other related point... Being a "diode", a cell is also subject to similar rules as their tiny counterparts... The primary difference is that light causes forward conduction. Shaded or "missing", doesn't matter, because the shaded area is effectively reverse biased, and therefore "open". This is why shading only a single cell in a panel will render it "powerless" (bypass diodes are used to address this issue).
I apologize if I took this way out on a tangent, but I think the thread demanded it for completeness... and maybe I'm a little bored LOL