What are the general specifications of generators? I want to use the generator to supply power to the electric tricycle. The motor of electric tricycle is 48V, 800W, which I should choose.

What you want to buy is a special kind of generator, named extended-range generator, which is specially designed for electric vehicles. Choose a 48V generator with a larger power, 2 kW or 3 kW. When you are big, you can run and charge. It is sold in Dezhou, Linyi and Liaocheng, Shandong. Weifang is not clear, but it is estimated. The price is between 1000 and 2000.