You'd need a pretty good size inverter to run power tools, not that that's a bad thing. I run an inverter in my Jeep but I use it mainly for a computer/gps setup.
I like the cordless power tool although you have be absolutely certain that it's charged and use is limited by the battery of course
My solution was finding a 12v cordless drill at a thrift store, bought it for $2, trimmed the bottom where the battery went and hard-wired it to a long cord with clamps. So I can pull it out, clip it onto the engine battery and drill holes or whatever all day long.
:camping:OK IF YOU REALLY WANT POWER FROM YOUR INVERTER I GOT A 3000 WATT & IT WILL RUN
JUST ABOUT EVERYTHING LIKE MY 2 HORSE 10 GALLON COMPRESSOR,POWER TOOLS,LIGHTS, HAMMER DRILL, ECT... BUT MAKE SURE YOU USE BIG CABLES DIRECT FROM THE BATTERY 0 GAGE..