Long Island’s first large-scale energy-storage battery would be placed on a parcel of land owned by National Grid in East Hampton that will also serve as the receiving station for the South Fork wind farm, a project designed to help meet rising power demand on the South Fork.

In papers filed this week with the state Public Service Commission, National Grid said it will lease out space for the big battery on a section of undeveloped land it already owns at 3 Cove Hollow Rd. in East Hampton. The property also houses four small peak-power generators owned by National Grid, and a LIPA substation.

The battery and a second planned for Navy Road in Montauk will be owned and operated by a 50-50 National Grid and NextEra Energy joint venture called LI Energy Storage System LLC. National Grid and NextEra are working together on other energy projects, including the largest proposed solar farm in the state near the never-opened Shoreham nuclear plant and a proposed overhaul of the E.F. Barrett plant in Island Park.

The East Hampton battery, which LIPA selected last year, will have a 5-megawatt capacity and provide as much as 40 megawatt hours of energy to the grid and will be placed at the substation. Substations step down high voltage from energy sources to lower voltages used in homes and businesses.

The battery systems will be housed in 4,000-square-foot buildings, according to Ross Groffman, executive director of LI Energy Storage System. Both National Grid and NextEra have previously installed battery storage systems across the Northeast, the country and in Canada.

They’ll draw energy from the grid to fully charge and provide eight hours of peak power, Groffman said. They are not expected to require zoning changes in East Hampton Town because they are considered “allowable uses,” he said.

National Grid, which acquired the property in 1998 as part of the Long Island Lighting Co.’s acquisition by its predecessor, KeySpan, said the vacant, undeveloped property “is not needed” for its power generation operations at the site.

The systems allow the utility to “balance electricity supply and demand instantaneously, while accounting for the intermittency of renewable energy,” the company says. When the wind isn’t blowing, for instance, the system can provide steady power for the grid without the sometimes extended startup times of older power plants.

National Grid said it expects to have the battery ready for LIPA by 2018.

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