Being that it's a portable brief case unit I would hope that the user tracks the sun throughout the day. It only takes 1 second to move it. With that being said - a 100w panel will probably only put out 5-6 amp on the best part of a sunny day at the perfect angle with no shading. Any shading issues or otherwise and that will most likely drop to 1-2 amps - shading issues and probably under 1 amp.
My guess is you would probably generate 15-25ah a day depending on conditions. Possibly a bit more if if you really track with the sun.