Global Portable Inverter Generator Market By Type (Under 1000 Watt, 1000-2000 Watt, 2000-3000 Watt, and 3000-4000 Watt), By Application (Outdoor Sports, Home Use, and Outdoor & Construction), By Region and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028