The prius has a dc to ac inverter/controller that controls 2 motors, which I think automatically switches to accept power for regen. braking. I bought one but didnt purchase the wiring harness or cpu so I am having trouble locating wiring diagrams for the actual ins and outs. You may look into that or find a salvaged Prius and it would already have everything you would need: controller/inverter,lithium batteries, 2 ac 3 phase motors, the computer, and all the wiring, switches, and lights. Toyota already did the hard work for us..... maybe.
The inverter I purchased,
Thanks for your time.
Brian