There has been no talk so far about EV incentives going away anytime soon as far as I know.
Last we heard was 2020 I think.To early to say anything about it the latest election results will have any effect on the incentives. (added vat is the biggest one I think).
We have to wait until we see which new government constallation we end up with.. but from the last one, which will mostly continue, they concluded with keeping current incentives until 2020 or so I think.
Edit: Found this one,
Regjeringen vil øke avgiften på elbiler fra 2018
They plan to slowly add road-tax to EVs also. But this will still be lower/similar to fossile fuel cars, so no effect on EV demand IMO. No talk about adding VAT?
Yggdrasil- do you have other info/details?