Negative additional costs

[jseppeli]

Hello,

I currently having a nordpool device which has an entity that is VAT 0%

I first tried making a sensor with yaml as in the instructions but that one is not refreshing at all, ever.

Then I've been trying to make one more with the integration but whenever I insert a negative additional cost it doesn't create a sensor, it just says that there is no device or entity.

Any suggestions?