Amperage x Voltage = Watts
2.7 amps x 120 vac = 324 watts
so if you've got 1500 watts peak/750 watts continuous available on your Inverter, you should have plenty as long as you don't try to anything heavy
(hot water heater, a/c, microwave, coffee pot, etc.)
We don't boondock hardly at all, so ours runs on AUTO all the time, primarily on vAC, but will switch to Propane if we lose electric.
2004 Dodge Ram 2500 Club Cab 4x4 CTD
2007 Sunline Solaris T-276-SR: Misty Blue/Cherry
2001 Dodge Ram 1500 Reg Cab 4x4 OFF-ROAD