Diesel Genset Market Size, Share, Growth, Trends, and Global Industry Analysis: By Application (Standby Power, Peak Shaving, and Prime or Continuous Power), By Power Rating (0-100 kVA, 100-350 kVA, 350-1000 kVA, and 1000 kVA), By End-User (Industrial (Utilities/Power Generation, Oil & Gas, Others), By Commercial (IT & Telecom, Healthcare, Others), and Region Forecast 2020-2031