I have a 12 V 90 amp hr battery. What size solar panel (watt) and how much sun is needed to charge this battery in one day?

I suggest you do a web search for:

"how to size a solar panel system", and you will find a wealth of information.

Let me google that for you (http://www.lmgtfy.com/?q=how+to+size+a+solar+panel+system)