Your operating class will be 2A, since you'll be more than two ops running 100w, regardless of your emergency power source. Were you running less than 5w, you'd submit your log as 2A-Battery. See:http://www.arrl.org/contests/rules/2007/fd.html
specifically Section 4.
See you on the air!
PS - Listen for W3OK, 2A EPA! =)