Recently, One of my friends purchased the Yamaha EF2800i Inverter Generator 2800 Watt, It's Premium Consumer Generator, Rated AC Output 2500 watts, Fuel Tank Capacity 3.0 gallons, Continuous Operation at 1/4 Rated Load 12.9 hrs., Noise Level 60.0 - 67.0 dBA; Inverter system with Pulse Width...