As long as the provision of basic data and requirements, such as vehicle size length × width × height, empty weight, total weight of the vehicle at full load and speed requirements and a mileage charge, roughly the shape of vehicles, the ideal base cost. 
 Can provide the following basic data; 
 1, vehicle type and power supply voltage, capacity and price. 
 2, the motor type and rated voltage, power, speed and price. 
 3, the transformation method of panels and cost. 
 4, the charger specifications and prices. 
 5, the motor speed control and reverse the specifications and prices. 
 6, the converter specifications and prices. 
 7, and the best four-wheel electric vehicle design-related technical advice. 
 8, in the best design under the full load speed of the vehicle, a mileage charge, the total cost.