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Omar Marrero, the director of Puerto Rico’s public-private partnerships agency, said that
. . . 10 substations would receive
. . . 20 megawatt-hours (or larger) battery systems, at a cost of
. . . $3.8 million each.

If successful, the proposal could scale up to
. . . 1,600 MWh over 3 phases.
Set to come online in mid-2019, these systems will replace oil, or diesel power plants,
. . . with solar power, and batteries.

Energy analysts expect net savings of
. . . $8 million to $12 million per substation.

6-28-2018 Source:  Puerto Rico: 200 megawatt hours (MWh) of #batteries