It's because when bought new the car had many subsidies available that brought the original MSRP down to low levels. So an electric car that has a MSRP of $30000 after subsidies may only cost the buyer $20000. Now factor in normal depreciation for a 3 year car that was bought for $20000 and not for $30000 thus the seemingly high depreciation.
Good question! I recommend you contact the Dealer directly.
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