When sourcing a Changchai generator, you must first determine the Power Output (kVA/kW) required for your application, ensuring the Prime Power meets your continuous load while Standby Power covers peak surges. Pay close attention to the Engine Model (e.g., single-cylinder air-cooled for small scale or multi-cylinder water-cooled for industrial use). Verify the Alternator Type, prioritizing 100% copper brushless alternators for better conductivity and longevity. Additionally, check the Fuel Consumption Rate (g/kWh) to ensure long-term economic feasibility.