The big question is why growing awareness of battery longevity is not translating immediately into lower lease prices for electric vehicles, which remain stubbornly expensive. The chief reason for this is the reluctance of banks, which sit behind these depreciation deals, to lower costs. With the small amount of data to work out future electric car values, or residual values, they have resisted dropping leasing rates.
....
However, a factor that could lead to greater depreciation of electric vehicles, Todd added, are constant advances in battery technology, which means older models may prove harder to sell.
...
Ultimately, it will take time — Todd reckons three to four years — for enough data to build up to convince financiers to take the jump and increase the residual values of EVs, which in turn will lower leasing rates. “Then, we will have enough insight to be confident of the [residual value] setting,” he said. Many of these “captive finance” companies that are owned by the carmaker, such as VW Financial Service or Ford Credit, are also large profit drivers for their parent companies. VW’s arm made €3bn profit in the first half of this year, while Ford made $1.7bn. This has led some in the industry to argue that the lenders have at least some incentive not to push the electric vehicle shift, which will lead to smaller short term profits, any faster than is necessary.