When sourcing three-wheel electric motors, the core focus should be on the motor power (typically 500W to 3000W) and the battery chemistry. For heavy-duty cargo, prioritize brushless DC (BLDC) motors for higher efficiency and lower maintenance. Ensure the battery is either Lithium Iron Phosphate (LiFePO4) for longevity (2000+ cycles) or Lead-Acid for initial cost-effectiveness. Additionally, verify the climbing capacity (gradient angle) and load capacity, which should ideally be ≥400kg for logistics or passenger variants.