  For the purpose of enabling, democratizing, and reducing the fees of
peer-to-peer energy trading for battery-powered devices, we propose ANKA as a
fully decentralized energy marketplace for peers with battery-powered devices.
ANKA utilizes state-of-the-art technologies, namely blockchain, smart
contracts, and decentralized applications. Within this marketplace, users who
possess surplus energy actively offer their excess energy for trading.
Concurrently, consumers can readily explore the energy options available and
make purchases according to their individual preferences while taking into
consideration the location of the offered energy and voltage compatibility. In
addition, we provide a comparison between a centralized traditional market and
our proposed solution, identifying that the cost of deploying and operating
ANKA is less than the centralized approach. We also position ANKA in comparison
to the recent blockchain-based decentralized energy marketplaces by considering
the metrics of blockchain type, scope, trading entities and the presence of
third parties.
