I have asked the following on Law, however, it has been closed as off-topic. Where can I find the answer?

Some companies sell their vehicles as "hybrid" vehicles, in that they take both an electric plug and fossil fuels to make them go. Some are referred to as "Self Charging Hybrids", as they do not have an external electrical connection to charge the battery.

Other companies sell their vehicles as "Electric Vehicles" with a "Diesel Range Extender". These take an external electrical connection to charge the battery, as well as diesel to fuel the range extender.

For example, when I was looking to purchase a fully electric vehicle recently, the salesperson for one manufacturer literally said to me, verbatim, that their vehicle "is not a hybrid, it's an EV with a range extender."

To the layperson, these could arguably seem like the same thing, as ultimately the "Diesel Range Extender" is, in reality, an Internal Combustion Engine. What is the legal definition that separates these two classifications? Is there a good reason for this, or is it just marketing shenanigans?

Does the law constrain the way that auto manufacturers can characterize their vehicles and, if so, how?

(Specific company names excluded to mitigate the risk of slander.)

This is not an engineering question as I, as do most, understand the difference between an internal combustion engine and a battery. It is also not a sustainability question as, again, there is little argument that fossil fuels are generally bad. As this surrounds the legal definitions of things, I thought "law" was the best place but evidently, I was mistaken. Where should I go?



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