This week, two startups have shown how blockchain technology can be used to trade electricity between users at the network edge, using rooftop solar panels. The demo is a glimpse of a potentially huge shift in the energy markets, which threatens to displace the role of utilities in the lives of the average consumer. Distributed power generation is both an asset and a liability for power utilities, which will need to carefully balance its adoption and benefits to their existing operations with the dawning realization that utilities will eventually act as middlemen for all but the largest energy users. This places them in a precarious position, and one that is ripe for disruption. LO3 is a startup with a focus…