First of all, don't be overweight or exceed the maximum load that the motor can carry, otherwise there will be problems, because I remember the electric car that I rode in high school, and the manual indicates that the maximum weight is 300 kg, which means you can take one person, but the sum of two people can't exceed this weight. If it exceeds this weight, its brakes will have problems, and the brakes will become very slow, and then the cruising range and motor life of this car will be greatly reduced.
Because the core of an electric car is a battery and the other is a motor. Otherwise, there is no essential difference with ordinary bicycles. The battery should be 48 or 64 now, which is a great progress and the endurance can be improved, but this does not mean that it has stronger carrying capacity. Then if the city lays a good foundation, the load will not exceed. However, in some rural areas, this may be uphill.
For the safety of yourself and others, don't ride an electric car as an artifact, but one person is already the limit. In the case of high-speed driving and long-distance driving, the electric car is actually not suitable for taking people, and it is only suitable for one person to ride. Because it exceeds the weight, its brakes will become very slow. In the past, 15 meters can stop, but now it can't stop at 20 meters, which must be a safety hazard.