Some real world numbers. At your latitude during the summer I get about 6 hours of full output with flat mounted panels, plus a few more hours of partial output. The KC-130 puts out 7.5 amps and the two 40W panels 2.5 amps each, wired in parallel to an MMPT controller for a total of 12.5 amps at the battery monitor
. It seems logical that two KC-135s would provide 15.0 amps, so yes, 100 amp-hrs is theoretically
you have clear skies, your panels aren't shaded, and your batteries are depleted enough to take a full 15 amps throughout the day. Realistically, when your batteries are near full charge the sun will shine, but when your batteries are really down it will be foggy, you'll be heeling away from the sun, the sails
will be shading the panels! So plan on something like 60% of your theoretical amp-hrs, and realize you'll need another power source when you get a few days of heavy overcast.
With multiple panels the unshaded ones can provide full output. You'll need to think about parallel vs. series wiring
. I'll leave that discussion to others.