The German electricity provider Kleiner Racker uses the blockchain for the identification of green power. The association of municipal utilities behind the power provider is making efforts to have new measurements and controls for the shares of green power. The solution developed for this is a digital parallel currency named "GrünStromJetons". This solution works with the consumers and not with the generation process. A green power index shows consumers how much green power is available in certain postcode districts. The more the power consumption shifts towards green power, the more jetons it will be credited with.