Massachusetts is a leader in the deployment of distributed energy storage in America, due to forward-thinking legislative approaches and other measures aimed at unlocking the full potential of the resource, analysts told Utility Dive.
The state, which is part of ISO New England (ISO-NE), recently became the first in the nation to allow behind-the-meter (BTM) energy storage to qualify for energy efficiency incentives. But the biggest boost to storage deployment in the state came when regulators decided to include storage resources in a new solar incentive program, Solar Massachusetts Renewable Target (SMART).
“Solar projects that participate under our SMART program are eligible to get an additional compensation rate if they pair with energy storage. You get more money if you pair with storage. The bigger the storage is and the longer duration it is, the more money you get,” Michael Judge, renewable energy division director of the state’s Department of Energy Resources (DOER), told Utility Dive.
The policy allowed Sunrun to bid into ISO-NE’s capacity market with 20 MW of aggregated BTM solar-plus-storage.
First of its kind
As a developer, Sunrun has reaped the benefits of Massachusetts’ aggressive push to expand energy storage deployment. The California-based renewable energy developer earlier this year set a new benchmark when ISO-NE accepted its bid for the 2022-2023 capacity market auction.
The success of Sunrun’s bid was a combination of strong state level policies and favorable wholesale market pathways, Christopher Rauscher, the company’s director for policy and storage market strategy, told Utility Dive.
“If we didn’t have that rock solid foundation for residential solar, we would not have been able to add on the storage in aggregate and fit into the market. That’s really what unlocked this at the state level,” he said. “The New England system operator, they have market access rules that are much more conducive to residential demand side resources than any other market in the country.”
Similar to Massachusetts, other ISO-NE markets, including Vermont, New Hampshire and Rhode Island have policies to encourage the development of residential solar and energy storage. Sunrun anticipates that the contract’s 20 MWs of capacity will be met with roughly 5,000 homes featuring onsite solar-plus-storage, which will be tied together through software to create a dispatchable resource for the system operator.
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