Made for military field operations with little concern for cost, we now have some at surplus prices. 4 cylinder engines made by Continental for extended service. Gasoline fueled, run unattended for 4 hours or more. Built in meters for voltage, amps, and hours. Massive terminals let you take the output to an inverter or put a bulk charge on a 24 volt battery in a hurry.
Appearance is variable, but the quality is superb.
Not derated until 8,000ft above sea level. Individually load tested before delivery.