No problem.
With my 50" LCD rp, denon 3808, and PS3 hooked up to the battery supply the most I am pulling is about 450 watts when playing an online mulitplayer game on the ps3. My ep500 is also plugged in, but not into one of the 5 battery enabled outlets so I don't think that the wattage displayed includes that. This is at typical listening levels, with my DVR on in the background as well. IF I have my xbox360 running in the background you can add about 100 more watts.
Battery run time is about 12 minutes in the above scenario.
