I'm trying to come up with a portable power solution. What I would like is something that could be wheeled on pneumatic tires into remote areas on an acreage and used to power a 400 Joker or maybe a 1200. Sound is an issue. Thinking about something like a marine battery array.
This is done all the time. K5600 sells an inverter that is used with two AB batteries to power the 400. You can get an industrial quality inverter to use with marine batts as you suggest, just be sure to use deep cycle batts like marine quality as normal auto batts won't do the job. With a 1200 you should consider getting several batts and wiring in series to have enough amps to last. One of the beauties of the joker lights is their ability to run at as low as 90volts, so a long extention cord works too. I've run almost a 1000' and it worked, but of course the heavier the cable, the less voltage drop and the longer you can go.