Ensure the unit meets ISO 8528 standards for reciprocating internal combustion engine driven alternating current generating sets. For environmental compliance, verify the Emission Stage (e.g., Tier 2, Tier 3, or Stage V) required by your local regulations. Additionally, check for CE certification and ISO 9001 quality management systems. The controller should be a reputable digital brand like Deep Sea (DSE) or ComAp to allow for precise monitoring of oil pressure, water temperature, and fuel levels.