What's the effect you're ultimately trying to achieve here?
If you want this inverter to run high powered equipment all day you might find it just drains your battery so you'll be stuck on site. Or you could leave the engine running with the keys in the ignition, which your insurance company might not be too happy about.
Do you often need to provide your own 110v power supply on other jobs?
Would you be better off just hiring a genny? Or getting a battery powered version of whatever you're trying to use?