That little inverter isn't going to do much for you at all, aside from charge a laptop and phones. For $100, you could get a couple of the same size from Wal Mart. I would look at something like a 1k watt inverter or larger, especially if you want to run lights.
They provide small inverters in vehicles because the power drain on the battery and electrical system has issues at higher power draws. A 1000w inverter running at a full 1000w would draw about 1200 watts from the battery. At 12 volts, the draw would be about 100 amps. It requires large gauge cable (#3 gauge, about 1/4" thick). The battery, with the engine off, if it is a good quality battery, will only be able to provide that for perhaps 20-30 minutes if it can do it at all (car batteries are not rated at that draw for that period of time). If the battery is not immediately charged again after such a deep discharge, it will live a short life. The more times it is used that way, the shorter its life will be. That means if you do a deep discharge you need to run the vehicle right after you use the inverter (if it starts after having been drained). Then you need to DIY the wiring, outlets, and find a place for the inverter; or have a pro do it. If you run the engine while using the inverter, then there is no point is having an inverter(1). Then there is the matter of running stingers from the vehicle to the set. Is the vehicle within 100' - 200' of the set?
You're likely better off running a small quiet generator at that kind of wattage. You can place the generator anywhere it is needed.
(1) - Running a 150-300hp engine for a 2hp function is a waste of fuel and an expensive engine.
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