The official word from Kranzle is that you must have AT LEAST a 4800W generator. The Kranzles that we sell all have high power requirements and the 1322TS/K1122TST/K1622TS have large spikes at startup, whenever the unit starts back up when the trigger is pulled, and when using a foam cannon. A lot of guys test the limits and run their Kranzles on 3000-3500W generators, but they always eventually run into weird little issues that always trace back to power.