ELCA has developed a proof of concept using Ethereum smart contracts. The aim of this POC is twofold: 1) to reduce administrative costs that burdens solar energy community managers, 2) increase trust and transparency in the billing(invoicing) process. It is our intent to motivate interested building owners to create a new revenue stream while benefitting from the incentives of a national strategy to reduce carbon emissions and dependence on foreign sources of energy. Traditional utility companies are also welcomed to see how the same concept can be applied in the respective market conditions. We plan to go live with this PoC during this summer 2017.