Some of this seems overly complicated. The price the consumer will see is the difference between what they paid for the car and what they sold the car for later, then add what the maintenance costs were, the taxes and insurance, and finally what it cost them in electricity (or gas). You don't need to know how much a piston costs on a gas or how much a battery costs on an electric. Plus 10 years ago somebody that knew their way around a high voltage battery pack was more like a rocket scientist in the fossil fuel world. Now rebuilding a Li-on battery may be more common DIY than rebuilding a small block Chevy is.
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