  Global warming is endangering the earth's ecosystem. It is imperative for us
to limit green house gas emissions in order to combat rising global average
temperatures. One way to move forward is the integration of renewable energy
resources on all levels of the power system, i.e. from large-scale energy
producers to individual households. The future smart grid provides the
technology for this. In this paper, a novel demand-side management concept is
proposed. It is implemented by a utility company which focuses on renewable
energy. Through a specific billing mechanism, prosumers are encouraged to
balance load and supply. A game-theoretic approach models households as
self-determined rational energy users that want to reduce their individual
electricity costs. To achieve this, they selfishly share energy with their
neighbours and also schedule their energy storage systems. The scheme is
designed such that monetary transactions between households are not necessary.
Thus, it provides an alternative approach to energy trading schemes from the
literature.
