Long Island Solar Farm

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Long Island Solar Farm
Long Island Solar Farm is located in New York
Long Island Solar Farm
Location of Long Island Solar Farm in New York
Country United States
Coordinates 40°52′N 72°51′W / 40.867°N 72.850°W / 40.867; -72.850Coordinates: 40°52′N 72°51′W / 40.867°N 72.850°W / 40.867; -72.850
Status Operational
Construction began 2010
Commission date November 2011
Owner(s) BP Solar & MetLife
Solar farm
Type Flat-panel PV
Site area 200 acres (80.9 ha)
Power generation
Units operational 164,312
Nameplate capacity 37 MWp
Annual generation 44 GWh (5 MW avg)

The 32 MW AC[1] Long Island Solar Farm (LISF), located in Upton, New York, is the largest photovoltaic array in the eastern U.S. The LISF is made up of 164,312 solar panels from BP Solar which provide enough electricity for roughly 4,500 households. The project will cause the abatement of more than 30,000 metric tons of carbon dioxide emissions per year. LISF is co-owned by BP Solar and MetLife through Long Island Solar Farm LLC. Municipal utility Long Island Power Authority (LIPA) buys the 37-megawatt (MW, 49,600 hp)[2] power plant's output, which is estimated at 44 GWh annually, under a 20-year power purchase agreement (PPA). Payments over that time are expected to total $298 million (34¢/kWh, 60¢/LIPA customer/month).[3][4] The project was engineered by Blue Oak Energy and construction subcontracted to Hawkeye LLC from Hauppauge, New York.[5] The plant earned the Best Photovoltaic Project of Year Award from the New York Solar Energy Industries Association.[6][7] The panels are mounted at a fixed tilt angle of 35°, with the rows spaced approximately 18 ft 4 in (5.59 m) apart.[2]:p.12

The solar farm uses 25 of the 1.25 MVA inverters and a 34.5 kV collector system. Since the connection to the grid is at 69 kV, and acquiring a spare step-up transformer of that capacity has a long lead time, a spare transformer is maintained onsite.[8] Each inverter has an associated meteorological station to help researchers correlate plant output with observed and predicted weather, to help learn how to integrate photovoltaics into the power grid.

A formal case study[9] of the development of the Long Island Solar Farm was published by the U.S. Department of Energy in May 2013.

Generation (MWh)[2]:p.30
Year Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Total
2011 3,435 3,008 6,443
2012 3,435 4,056 4,837 5,910 4,693 5,611 5,447 5,433 4,672 3,402 3,370 2,101 53,128
2013 2,846 2,935 4,477 6,057 5,421 5,582 27,319

Eastern Long Island Solar Project[edit]

The 17 MW (AC) Eastern Long Island Solar Project consists of a group of projects, three at LIRR carparks. $124 million has been allocated to pay for the electricity generated, over 20 years, from the project (approximately 27¢/kWh).[10]

Project Locations[11]
Location Town Output (MW AC) Modules Number of arrays
H. Lee Dennison Building Hauppauge 1.75 7,737 24
North County Complex Hauppauge 0.5 3,431 9
Cohalan Court Complex Central Islip 3.5 15,113 27
Riverhead County Center Riverside 3 11,536 31
Brentwood LIRR Parking Lot Brentwood 1 3,924 11
Deer Park LIRR Parking Lot Deer Park 2.25 3,924 39
Ronkonkoma LIRR Parking Lot (south) Ronkonkoma 5 20,110 44

Clean Solar Initiative[edit]

LIPA has a Clean Solar Initiative which will install an additional 50 MW of solar photovoltaics, to be paid $0.22/kWh over a 20-year period. 5 MW is reserved for small systems of from 50 kW to 150 kW, 10 MW for systems from 150 kW to 500 kW, and the remaining 35 MW is for systems of any size, up to 20 MW. All systems must be connected to the grid at the 13.2 kV level. Systems connected before July 2012 are not eligible.[12][13]


  1. ^ Long Island Solar Farm
  2. ^ a b c Site Data pg. 8
  3. ^ Power's on at BP's Long Island Solar Farm
  4. ^ LIPA flips switch on Long Island Solar Farm
  5. ^ "Utility Scale Solar Projects", BlueOakEnergy.com.
  6. ^ "Long Island Solar Farm Opens in Upton". Long Island Press. November 21, 2011. 
  7. ^ Hering, Garrett. "BP Solar completes 37 MW project in New York – largest PV system on East Coast". PHOTON - The Solar Power Magazine. November 2011: 31. 
  8. ^ "Long Island Solar Farm Goes Live!", BlueOakEnergy.com.
  9. ^ http://www.nrel.gov/docs/fy13osti/58088.pdf
  10. ^ "LIPA Procurement Report", pg. 38, lipower.org.
  11. ^ enXco Eastern Long Island Solar Project
  12. ^ "Long Island Power Authority announces Feed-In Tariff", NixonPeabody.com.
  13. ^ "Clean Solar Initiative Feed-In Tariff", lipower.org.

External links[edit]