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Tesla battery last year in Hornsdale,]South Australia, cost
. . . $66 million, and
. . . it just earned 1/3 of it's cost back,
. . . in the first year.

A return on investment of 3 years is remarkable, and
. . . something that should make other utility companies sit up and take notice.
The payback time for most of their generating plants, and infrastructure,
. . . is usually measured in decades,
. . . not a few years.

9-28-2018 Source:  #Tesla #Battery In South Australia