i was hoping they might keep the batterys charged ?
Big issues - how clear are the skylights? How much of the day does the light hit the solar panels? Will be solar panels be pointed toward the sun? How much of the panel is shaded are areas that aren't skylight - and for how much of the day.
And also, are you talking about using power or purely keeping batteries up while stored with no loads on them?
I think that you'll find that the power will be very low, unless you can get really good answers to the questions in the first paragraph. How much power will you need to keep batteries up? How much power will you make? Only when you answer those two questions -- with *real life* numbers will you know. I stand by my guess that you'll have a hard time making such a system do anything for you. But that's only a guess with very little hard info.
Bruce H, NC USA