Everyone, you are missing the point, to get 2000 watts or more out of an inverter, you need a really BIG battery with a lot of capacity, automotive batteries will not work. There are very nice 2000 watt INVERTER based home generators that are quiet, designed to provide this power level and run on gasoline, this is what you need.
Also, NO you cannot take a 12 volt inverter and run it off 48 volts, unless it is designed for that voltage range.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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