Not enough information, You said "I have two deep cycle batteries"
True Deep cycle or Maine Deep cycle
Group 24 (75 amp hours each, 75 amp hours usable if TRUE deep cycle, less if Marine)
Group 8D (260 amp hours each, same math as above).
GC-2 (210-230 Amp Hours depending on brand total, 50% usable, these are True Deep cycle).
Then there is the chart above on how much power is sucked...
Fact: I took a peek at my Prosine monitor panel yesterday.. Where it used to say SIX amps (120 volt pass through) it now says FOUR.. I swapped a CRT TV for a flat screen, Saving close to 3KWH per day for the park and of course the batteires now go a long longer when boon/wally-docking.