Green Mountain Power’s pilot program in which the utility controls Tesla Powerwall batteries in hundreds of customer homes to create a virtual statewide energy-storage system as gotten the official stamp of approval: Regulators have given it a “tariff,” or an amount that the utility can collect for using the system to regulate the grid.

Greentech Media has a good story about it here. New Hampshire is tiptoeing toward similar systems but hasn’t gotten beyond the small-pilot stage yet; Vermont is way ahead of us.

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