I was wondering why SoH gets reported haphazardly, knowing how it affects value so much. Any thoughts?
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There’s a few companies trying to standardize battery health ratings, sort of like Carfax, but for the batteries specifically.
There are quite a few companies that provide this service in Europe. Usually it works by putting a device in the OBD port and then measuring the amount of energy which is used as the car is driven over time. There are also second hand EV dealers that provide this information as standard, for instance DriveGreen in the UK provides Moba battery reports for all the cars it sells: