Hello, can someone help me with my group project. My group was given a Go-Kart to improve on (built by previous students). The kart is a hybrid that can only run on one power source at a time. Our goal is to be able to switch between the gas and electric power with a switch of some sort and to charge the batteries while it's running on gas power (or electric if possible). How do you think we should go about on doing this? We have 4 batteries and each contains 12 volts so 48 in total.
The pictures is what my go-kart has.
I've been thinking of using this generator to provide juice for the batteries. I'm going to attach the generator with a 4:1 gear ratio on the wheel axle so it can generate.