aWATTar binding: Beta and discussion

Please add a parameter for basePrice to the Entso-E Bridge (aWATTar - Bindings | openHAB, aWATTar binding: Beta and discussion - #17 by Wolfgang1966).

If you don’t trust your energy supplier to calculate the base price correctly, it gets quite complicated to calculate the base price per kWh in Germany :slight_smile: : Understanding the Tibber price model (Germany)