Global Generators Market Assessment, By Type [Standby Generators, Portable Generators, Inverter Generators, Others], By Fuel Type [Diesel, Gas, Hybrid, Others], By Voltage [Below 250 kW, 250 kW to 500 kW, 501 kW to 750 kW, 750 kW to 1 MW and Above 1 MW], By End-user [Commercial, Industrial, Residential, Others], By Region, Opportunities and Forecast, 2017-2031F