Residents of the Park Slope area of Brooklyn are now able to sell power generated from rooftop solar panels via a microgrid enabled by a blockchain ledger that records every transaction made with a local utility.
The physical microgrid, set up by Siemens Digital Grid Division, includes network control systems, converters, lithium-ion battery storage and smart electric meters. In case of another hurricane like Sandy in 2012, residents on the microgrid would continue to have power for a time even during a blackout as they could switch over to battery reserves.
from Computerworld News http://www.computerworld.com/article/3191256/sustainable-it/blockchain-used-to-power-brooklyn-microgrid-for-solar-energy-re-sale.html#tk.rss_news
from Tumblr http://2375823.tumblr.com/post/159801330033