My EV Trike
How did I build my EV Trike? Take these parts:
48v 1000w motor from tncscooters.com $110
48v Controller also from tncscooters.com $45
Soneil 48 Volt 3.5 Amp Battery Charger (** there are cheaper options) from batterystuff.com $150
4 12v 35AH Lead Acid Batteries from powerstridebattery.com $280
Add some bits of odd hardware from your local hardware store maybe $100 and a couple of weekends and skinned knuckles.
This adds up to $935 and it’s just to give you an idea you could easily do more or less. You might be able to find some of these parts used and there are always coming up with new products, better batteries which I encourage you to investigate. One thing I’d certainly look at if I were doing this again from scratch is the hub motor – it looks easier than all effort I put into placing the motor.