Every car manufacturer must produce a certain percentage of electric cars. If their actual EV sales aren’t enough to cover that requirement, they can purchase “EV credits” from companies that exceeded their regulatory requirements to avoid a fine.
Essentially this policy gets car companies that aren’t producing EVs to subsidize the ones that are.
You might argue that the company receiving money for "EV credits" would invest them in increasing the production, but that's often not the case - since they have already met their quotas and are off the hook, they are free to simply hand this money out to shareholders in form of a dividend.
"California, and nine other U.S. states that have adopted its ZEV regime, require automakers that sell internal combustion engine-based vehicles to earn a certain number of ZEV credits every year by selling zero-emission vehicles. The credit requirement is typically determined by the number of vehicles that the manufacturer sells in the state. If an automaker doesn’t produce enough electric cars to meet its quota, it can choose to buy credits from other manufacturers who do or pay a $5,000 fine for each credit it is short."
https://www.forbes.com/sites/greatspeculations/2017/09/01/te...
I also don't know if they selling carbon credits in this category or not.