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COVER STOR
COVER STORY: US STATES TO WATCHY: US STATES TO WATCH

Trumping the president

The US states

forging a path to a

decarbonized future

In real terms, California-based residen- In 2010, California
tial PV supplier Sunrun predicts that if the established the nation’s
percentage of new single and multifamily first energy storage tar-
solar installations that include a battery in get with the passage of
Los Angeles increases to 80% by 2025, the AB 2514, which estab-
cumulative amount of solar-charged resi- lished a goal of 1.3GW
dential battery capacity available to util- of energy storage by 2020
ity Los Angeles Department of Water and for the state’s three inves-
Power as a dispatchable resource could tor-owned utilities: Pacific
grow to more than 1GWh by 2030. Gas & Electric (580MW),
“The adoption of residential batteries Southern California Edison
is growing nationwide, predominantly in (580MW), and San Diego
tandem with home solar,” stated Sunrun Gas & Electric (165MW). In
in its 2019-2030 Repowering Clean Giga- 2016 the state added a new tar-
watt-Scale Potential for Residential Solar get with the passage of AB 2868,
& Battery Storage in Los Angeles report. which called for 500MW of
It went on: “In response to utility pro- storage, or 167MW for each
grams, incentives and ‘Time of Use’ rates, IOU.
customers are embracing storage to man- In February, 2018, SDGE
age their electricity bills and store energy announced plans to add
to have backup power in outages.” 166MW of storage in San
The report states that through Q3 2018, Diego County to ensure the
residential battery deployment increased region’s security of supply in
526% year-over-year, with residential case of another major emer-
ESSs constituting 35% of all energy stor- gency like the 2015 Aliso
age deployed in the first three quarters of Canyon gas leak which led
2018. to Tesla (20MW), Greensmith
As utilities across the US invest in energy Energy (20MW) and AES En-
storage, including replacing gas peaker ergy Storage (30MW) deploying
plants, the first three quarters of 2018 saw lithium ion battery projects in
more residential storage installed than the area to replace the gas plant.
EESs deployed by utility companies. The utility’s seven proposed
As more and more utilities pair storage projects were in response to AB
with renewables the question remains how 2868, which was signed into
can they aggressively move into the vari- law in 2016 and allows compa-
ous grid-scale service markets? nies to add distributed energy
storage.
Leading the way Lessons learnt by the Gold-
In terms of public policy, California, New en State are informing the
York, Massachusetts and Hawaii are like- mandates of other states.
ly to continue to lead the nation’s other 46 “They threw the gauntlet
states in terms of energy storage deploy- down and that’s a really
ment. good thing because the folks

Energy Storage Journal • Summer 2019 • 21nal • Summer 2019 • 21
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