Global Solar Generator Market Assessment, By Grid Connectivity [On-grid, Off-grid], By Composition [Rechargeable Battery, Solar Inverter, Portable Solar Panels, Solar Charge Controller], By Energy Capacity [Less Than 40 KWH, 80 to 150 KWH, More Than 150 KWH], By End-user [Residential, Commercial, Utility], By Region, Opportunities and Forecast, 2017-2031F