Household energy storage and electricity sales

Are residential energy-storage installations worth it?

Residential energy-storage installations even exceeded utility-scale storage installations for the first time in 2018, reflecting the high value customers are placing on having their own storage systems. — Falling costs.

What is a residential energy storage system?

Residential energy storage systems integrate various components including battery cells, modules, power conversion systems (PCS), software i.e., battery management systems (BMS) and energy management systems (EMS), and other balance of plant items.

Could residential batteries be used to deliver energy-storage services?

Residential batteries could be linked together and dispatched to deliver grid support services, much as utilities use demand-response programs and ancillary services resources today. Since the batteries are already in place, the marginal cost of dispatching residential energy-storage resources could be quite low.

Can residential energy storage be integrated?

Annual installations of residential energy-storage capacity could exceed 2,900 MWh by 2023. The more residential energy-storage resources there are on the grid, the more valuable grid integration may become. So several states are experimenting with grid-integration programs targeted at residential energy storage.

Will residential energy-storage growth continue?

As a result, we expect continued strong residential energy-storage growth. Annual installations of residential energy-storage capacity could exceed 2,900 MWh by 2023. The more residential energy-storage resources there are on the grid, the more valuable grid integration may become.

Are energy-storage installations growing in the United States?

Residential energy-storage installations in the United States have increased dramatically—more than 200 percent annually—during the past four years, and rapid growth is expected to continue (Exhibit 1).