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A portable LP tank will not produce sufficient vapor volume to run this genset. It would start and run for a few seconds, then run out of gas, if it would even start at all.
For a 16 kW unit, you need a minimum of a 500 gallon tank if your temperatures ever drop to 0 degrees, or a 250 gallon tank if your temperatures never drop below 20 degrees, or a 120 gallon tank if your temperatures never drop below 40 degrees.