When sourcing a 100kVA generator, the engine brand (e.g., Cummins, Perkins, or high-quality Chinese brands like Yuchai) is the most critical factor for reliability. You must verify the Prime Power vs. Standby Power ratings; a 100kVA unit typically provides 80kW of continuous power. Ensure the alternator is 100% copper wire brushless type (such as Stamford or Leroy Somer technology) to guarantee voltage stability and heat dissipation. Additionally, check for a digital control system (e.g., Deep Sea or SmartGen) for automated monitoring and protection.