With the proliferation of lithium ion-batteries for small-scale energy storage projects, non-commercial transportation of significantly large batteries (in the few kWh range, much larger than the few hundred Wh limits currently set for non-regulated batteries) will become much more common. What regulations pertain to this type of non-commercial transport in the U.S.? How does this change once the batteries are installed in a trailer, RV, boat, or other transportable vehicle?
My specific situation is that a repair shop is requiring HAZMAT certification for whoever picks up a replaced Tesla battery pack that I wish to (personally) transport elsewhere. Is this a governmental regulation in general if, say, I was to (personally) transport the pack or its components in the future?