How fast can a 400W motor run?
2 Answers
A 400W motor paired with a 48V 350W controller has a maximum speed of only 25km/h. Additional information: If equipped with a 60V battery and a (600W) 9-tube controller, the maximum speed can reach 32km/h. When using an 800W controller, the top speed increases to 35-38km/h. Below are relevant details: 1. 600W motor: With a 60V battery and 9-tube controller, the maximum speed reaches 35-38km/h. If upgraded to a 72V battery and 12-tube controller with 800W output power, the top speed can achieve 42-45km/h. 2. 800W motor: Paired with a 60V battery and 9-tube controller, the maximum speed is 45km/h. When using a 72V battery and 12-tube controller with 1000W output power, the top speed increases to 51km/h. With current further boosted to 33A and peak power reaching 1500W, the fastest speed attainable is 60km/h.
I've always been curious about the performance of electric motors. I've tried a 400-watt electric bicycle, which usually reaches about 25 km/h on flat ground. Weight has a significant impact—it worked well for me at 70 kg; with extra load or uphill, the speed drops below 15 km/h. Battery voltage also matters—for example, 48 volts is faster than 36 volts. Under-inflated tires increase friction and slow you down. It's great for daily commuting—safe and economical, and I often use it to save fuel going to work. But be mindful of the weather, as it can get slippery in the rain; regular maintenance like cleaning the chain helps maintain steady speed. City riding is super convenient, especially when zipping through traffic jams—just don’t forget to wear a helmet for safety. Overall, a 400-watt motor is suitable for short distances without high-speed demands.
