Value Far Beyond Demand Charge Reduction
Peak demand reduction is only one of many value streams for behind-the-meter storage, a new study finds. by Katherine Tweed October 07, 2015 In the U.S., behind-the-meter energy storage is mostly sold to offset commercial peak demand charges. The business case works today in states such as California and New York, but it also leaves most of the battery’s value on the table, according to a new report from Rocky Mountain Institute. RMI’s meta review of the value of energy storage, pulling from many previous studies, found that batteries dispatched solely for demand reduction are only used for about 5 percent to 20 percent of their useful life. RMI identified 13 distinct services for customers and grid operators, but when it comes to stacking those, there is immense variation in the final cost-benefit depending on assumptions and inputs such as local utility regulations and wholesale market mechanisms. The report was written not just to validate what progressive states like New York, California and Hawaii are doing, but also to show what’s possible in other states. “Valuing batteries is not as simple as looking at just [the levelized cost of] solar or looking at retail or wholesale grid costs,” said Jesse Morris, manager of the electricity practice at RMI. “A lot of regulatory changes need to happen.” To better capture the complexity, the RMI study modeled four primary use cases for batteries: commercial demand-charge management in San Francisco; distribution upgrade deferral in New York; residential bill management in Phoenix; and solar self-consumption in San Francisco. Three of those use cases, which were paired with secondary services such as ancillary services, resource adequacy or time-of-use optimization, were revenue-positive by a small margin. The New York use case [...]