[MLB-WIRELESS] Solar Power - How much battery?

[gregsonm at aanet.com.au]

Question... how do you calculate the amount of battery a solar panel can
charge?

I know some of you will say it depends on how much sun there is... which
would be right. But I am looking for a basic calculation to make sure I
have the maximum battery capacity possible.

For example, if I use an 80 watt solar panel, what would be the amount of
battery amp hours I could charge?

All advice greatly appreciated... Mark