The continuous operational runtime of a Honda portable generator on a full tank of fuel varies significantly depending on the specific model's fuel capacity, engine displacement, and the electrical load being drawn. Compact inverter generators, such as the popular Honda EU2200i, can run anywhere from approximately three and a half hours at maximum rated output to over eight hours under a light twenty-five percent eco-throttle load. Larger industrial or residential standby models feature much larger fuel tanks to sustain extended runtimes during emergency power outages.