Hi @Simon_Bunn. That confirms it thanks. I assume Tibber has blocked access to the NZ Polestar VIN database or similar. You may be able to use the customer integration in this post though:
Integration of Polestar 2 - #165 by leeyuentuen.
Unfortunately, I can not as it requires your car to be identified and owned by you under your Polestar ID, which being a lease car mine is not.