Summary - great inverter delives plenty of juice for power tools, but one of my chargers didn't like it :(I used aP3 International P4400 Kill A Watt Electricity Usage Monitorto measure power consumption of the devices I used.Bosch 20V Litheon Charger - 49 wattsDremel 10.8V Lithium charger - 9 wattsGreenworks 40V Lithium Charger - 98 watts (wall outlet)Black and Decker jigsaw 135 watts (no load)  / 220 watts (Cutting 1/2" plywoodPorter Cable Quicksand 106 watts (no load) / 174 watts (sanding w/ 80 grit)To cut to the chase, I was able to get both the jigsaw and the sander working at the same time and the Bosch and Dremel chargers never missed a beat.  That's a good ~470 watts of power tools and charger.On the other hand, for some reason the Greenworks 40V charger would start up then shut down.  I played around with the kill-a-watt and think it might be the line frequency.  The line frequency of a wall outlet is 60 hz, but for some reason the kill-a-watt sees this as 11 hz.  I don't think Energizer is really using 11 hz, but the kill-a-watt thinks it is.  This must be the same issue that causes the Greenworks charger to shut off.I did trip the internal breaker when I tried to run a heat gun.  The heat gun on low pulls 656 watts then quickly ramps to 874 - still below the surge, but the gun neve started up, tripped the breaker right away.Although this inverter has a cooling fan, it never seemed to kick in - either that or it's *really* quiet.  The inverter comes with two sets of connectors - cigarette type connector for lower power applications (Most cars use a 10 or 15 amp fuse, which means you can't run more than 120 or 180 watts before you blow the car fuse - DAMHIKT)  and an alligator type for hooking directly off the battery.  I did all my tests with the engine off - if you are planning to do some major work off this inverter, I suggest you leave your vehicle in idle so you don't end up walking.Mounting brackets just in case you want to mount directly to your vehicle - they do raise the inverter away for a cooling gap.