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Companies Are Using California Homes As Batteries To Power the Grid (qz.com)
"Companies like Tesla and SunRun are starting to bid on utility contracts that would allow them to string together dozens or hundreds of systems that act as an enormous reserve to balance the flow of electricity on the grid," reports Quartz. "Doing so would accelerate the grid's transformation from 20th century hub-and-spoke architecture to a transmission network moving electricity among thousands or millions of customers who generate and store their own power." From the report: In theory, networked home-solar-and-battery systems, acting in coordination over a single geographical area, could replace things like natural gas "peaker" plants need to help support the grid on a moment's notice. But it's an open question whether it makes financial sense. Kamath says renewable mandates could keep home solar-storage solutions for the grid going for a while, but the idea will have to prove itself on the market, perhaps by aggregating large areas, if it wants to seriously compete with existing energy assets.
SunRun told investors in 2017 that its pilot programs suggest it could competitively generate $2,000 worth of services by managing electricity flow back to the grid. The company has recently dropped its combative stance with utilities dragging their feet on accepting home solar. Instead, it's pursuing cooperation with the utilities now, in hopes of selling them home-based power. That would allow it grab a chunk of the billions being spent on modernizing the grid. "We don't want to be in a position of building two competing infrastructures," SunRun's Jurich said.
SunRun told investors in 2017 that its pilot programs suggest it could competitively generate $2,000 worth of services by managing electricity flow back to the grid. The company has recently dropped its combative stance with utilities dragging their feet on accepting home solar. Instead, it's pursuing cooperation with the utilities now, in hopes of selling them home-based power. That would allow it grab a chunk of the billions being spent on modernizing the grid. "We don't want to be in a position of building two competing infrastructures," SunRun's Jurich said.
Perhaps one day. Right now, fully off-grid solar is very expensive. You need to have sufficient generation capacity for the winter when daylight hours are short, which means you are greatly over-capacity in summer. You could set up a system for selling this excess, but then you are back to the need for a distribution network - which remains as much a natural monopoly as before. Plus generating is simply cheaper in bulk, when you have economy of scale. Which do you think is cheaper: Sixty thousand little 100W rooftop wind turbines, or one 6MW monster of a commercial-scale turbine?