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East Hampton Microgrid Feasibility Study

Current status, energy mix, organizations, suppliers, equipment, controls, reported specifications, and project updates—with source-level citations.

CoverageDetailed public record
Named organizations10
System facts21
Sources reviewed6
Evidence reviewed2026-07-20

The Long Island Community Microgrid Project was a 2015–16 NY Prize Stage 1 feasibility study, not a constructed microgrid. Its preferred concept would have coordinated up to 15 MW of solar, a central 5 MW/25 MWh battery, three smaller facility batteries, existing 6 MW substation peakers and critical-site generators across two East Hampton feeders. The resilient boundary included water pumping and fire protection plus thousands of customers, far beyond the police-substation address in the legacy record.

Research status
Feasibility completed; proposed system not built. East Hampton was absent from the eleven NY Prize Stage 2 awardees, and the Town's current renewable-energy roadmap still describes LICMP as a 2016 study while recommending that the Town develop future large-scale microgrid partnerships. A separate NextEra 5 MW/40 MWh utility battery entered service in East Hampton in 2018, but it is not the proposed 5 MW/25 MWh LICMP community microgrid and must remain a separate record.
Historical classification
Building
Reported capacity
See component specifications
Coordinates
40.96921, -72.17218
Evidence note: “Every company” cannot be proven from public material alone. This page lists every organization found in the recovered record and reviewed sources, preserves unknown roles, and explicitly marks undisclosed controller or equipment details.
Report missing evidenceResearch methodology

Project delivery

Who was involved in East Hampton Microgrid Feasibility Study?

10 publicly identified organizations. Where a recovered source named a participant without explaining its work, the role remains explicitly unspecified.

Organization

Clean Coalition

Lead technical/project-development consultant for the LICMP feasibility study. [2]

Organization

New York State Energy Research and Development Authority

NY Prize Stage 1 study funder and administrator. [2][3]

Organization

NextEra Energy Resources

Developer of the separate 5 MW/40 MWh East Hampton Energy Storage Center commissioned in 2018. [5]

Organization

NYSERDA

Publicly named participant; role not specified in the recovered record [1]

Organization

PSEG

Publicly named participant; role not specified in the recovered record [1]

Organization

PSEG Long Island / Long Island Power Authority

Serving utility, distribution/SCADA partner and owner/operator context for proposed substation resources. [2]

Organization

Renewable Energy Long Island

Publicly named participant; role not specified in the recovered record [1]

Organization

Springs Fire District

Critical-facility/first-responder partner in the proposed resilient boundary. [2]

Organization

Suffolk County Water Authority

Critical-facility partner for Bridgehampton and Oak View pumping stations. [2]

Organization

Town of East Hampton

NY Prize applicant, community sponsor and current energy-roadmap owner. [2][4]

System evidence

Energy mix, capacity, and specifications

Values can describe different project phases, generation sources, storage systems, or other components. Source citations are attached to each figure so discrepancies remain visible.

Storage
NA [1]
Proposed solar
Up to 15 MW: 10 MW of separately planned third-party PV plus 5 MW additional PV enabled/optimized by the microgrid. None is verified as built under LICMP. [2][4]
Proposed central storage
5 MW/25 MWh at the East Hampton gas-turbine substation, five-hour nameplate duration, plus three smaller local facility batteries whose final ratings were not selected for construction. [2]
Existing backup generation in study
Three 2 MW distillate-fueled substation generators (6 MW aggregate) plus site emergency generators with roughly two days' fuel. These were existing/secondary backup, not new renewable capacity. [2]
Proposed customer/critical-load boundary
Two feeders serving two water-pumping stations, Springs Fire District, about 100 commercial/industrial customers and approximately 3,200 residential customers; study context cites water service for roughly 40,000 people. [2]
Modeled solar energy
Approximately 17.8 MWh/day from 5 MW new PV, 35.6 MWh/day from the 10 MW portfolio and 53.4 MWh/day at 15 MW, compared with about 27.3 MWh/day of secondary-priority demand. [2]
Independent BCA cost
Approximately US$40.4 million lifecycle cost: US$34.9 million capital, US$60,000 planning and US$5.47 million present-value fixed O&M; the central 5 MW/25 MWh battery accounted for roughly US$20 million installed/service cost over 20 years. [2]
Benefit-cost result
Without a specific avoided transmission upgrade, BCR 0.4 and NPV -US$24.7 million; with that deferral credited, BCR 1.1, NPV +US$4.04 million and IRR 8.2%. The no-deferral case needed about 6.6 outage days/year to break even. [2]
Separate operating BESS
East Hampton Energy Storage Center: 5 MW/40 MWh lithium-ion, commercial operation August 2018. It is a utility peak/resilience asset from a separate South Fork procurement, not LICMP's 25 MWh conceptual battery. [5][6]

Controls and hardware

Equipment and controller details

Manufacturer and model are shown only when a source names them. Generic descriptions are not converted into guessed product assignments.

01

Central BESS (proposed only)

Model not publicly disclosed

5 MW/25 MWh at the East Hampton substation, with battery/inverter OEM and chemistry to be selected in a later stage that did not occur. [2]

02

Facility DER (proposed only)

Model not publicly disclosed

Local PV, storage and controllers at three critical sites, capable of local autonomous operation if communications failed; final vendors and ratings were not procured. [2]

03

Existing peakers

Model not publicly disclosed

Three 2 MW distillate generator units at the substation, retained as secondary/emergency supply in the study; exact engine models are not disclosed. [2]

04

Separate East Hampton BESS

NextEra Energy Resources

5 MW/40 MWh lithium-ion East Hampton Energy Storage Center commissioned in 2018; listed here only to prevent conflation, not as LICMP equipment. [5]

Technical record

Architecture, performance, and project updates

Concise technical facts, milestones, operating results, and later developments. Dated notes distinguish historical design claims from current evidence.

  • General

    The proposed microgrid would include a mix of solar, wind, advanced battery storage, and intelligent load and grid management, in addition to existing back-up generators. [1]

  • Storage

    Advanced battery storage [1]

  • Generation

    The proposed microgrid would include a mix of solar, wind, in addition to existing back-up generators [1]

  • Control architecture

    A central substation controller would coordinate utility-owned/front-of-meter DER through PSEG Long Island SCADA and hardwired/leased telecommunications, with facility controllers able to island locally on communications loss. [2]

  • Emergency operation

    The central battery was modeled near 50% state of charge before an event, and conservative P10 solar production was used for resilience planning rather than average-weather output. [2]

  • Hardening assumptions

    Critical installations were to be designed around 130 mph wind and one-in-500-year flood criteria. [2]

  • Stage outcome

    The project did not appear among the eleven NY Prize Stage 2 winners. The current Town roadmap's future-tense recommendation to develop large microgrids corroborates that LICMP remained a study. [3][4]

  • Technology-boundary warning

    The legacy text mentions wind, but the final quantified study configuration centers on solar, batteries and existing backup generation. South Fork Wind and the 2018 5 MW/40 MWh battery are separate projects. [2][5][6]

Provenance

6 sources

Primary owner, government, university, supplier, and engineering sources are preferred. Archived references preserve claims whose original pages moved or disappeared.

  1. [1]
    Recovered Microgrid Projects record

    Internet Archive · Archived source · captured 2021-04-20

  2. [2]
    Long Island Community Microgrid Project — NY Prize Stage 1 Feasibility Study

    Town of East Hampton / Clean Coalition / NYSERDA · Primary source

  3. [3]
  4. [4]
    Town of East Hampton 100% Renewable Energy Roadmap

    Town of East Hampton · Primary source

  5. [5]
    East Hampton Energy Storage Center

    NYSERDA Distributed Energy Resources database · Primary source

  6. [6]

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