You can get lucky and find deals where the money down is even lower. I missed one where it was $1500 down so CA was basically paying you $1000 to take the car (or if you factor in the monthly fee cost around $60 a month).
Part of the reason for this is that it's a compliance car. I think the way it works is CA requires the MPG of your fleet to meet some very high standard. In order to meet this manufacturers that want to sell in the state make an EV with a very high MPGe that helps the average. Then they have to sell a certain number of them (it can't exist in name only). You can end up getting lucky.
[Edit] Looks like my understanding of the compliance car bit was wrong, seems to be just a hard requirement to sell some amount of zero emissions vehicles: https://www.thoughtco.com/what-is-a-compliance-car-85648