Name: Long Island Solar Farm: Infrastructure and Development
Address: US

Overview

The Long Island Solar Farm is a large-scale photovoltaic installation located in Upton, New York. Commissioned in November 2011, the facility was recognized as the largest photovoltaic array in the eastern United States at the time of its inauguration. The plant operates under the ownership of Long Island Solar Farm LLC, a joint venture co-owned by BP Solar and MetLife. The Long Island Power Authority (LIPA), the local municipal utility, serves as the primary off-taker for the facility's electricity output. The project represents a significant infrastructure investment in the region's renewable energy capacity, engineered by Blue Oak Energy with construction subcontracted to Hawkeye LLC, based in Hauppauge, New York.

Technical Specifications and Capacity

The solar farm has a rated capacity of 31.5 MW. The installation consists of 164,312 solar panels manufactured by BP Solar. These panels are mounted at a fixed tilt angle of 35 degrees, with rows spaced approximately 5.59 meters apart to optimize solar exposure. The facility generates an estimated 44 GWh of electricity annually. This output is sufficient to power roughly 4,500 households. The operational status of the plant is currently active, contributing to the regional grid stability and renewable energy mix of New York State.

Ownership and Commercial Structure

The commercial framework of the Long Island Solar Farm is defined by a 20-year power purchase agreement (PPA) between the owners and the Long Island Power Authority. Under this agreement, LIPA purchases the plant's output, with total payments over the contract period expected to reach $298 million. The project has demonstrated significant environmental impact, with an estimated annual abatement of more than 30,000 metric tons of carbon dioxide emissions. The facility received the Best Photovoltaic Project of Year Award from the New York Solar Energy Industries Association, highlighting its engineering and operational achievements within the regional energy sector.

History and Development

The Long Island Solar Farm was commissioned in 2011, establishing itself as the largest photovoltaic array in the eastern United States by November of that year. This development resulted in a 31.5 MW facility operated by the Long Island Power Authority (LIPA). The plant is co-owned by BP Solar and MetLife through the entity Long Island Solar Farm LLC.

The facility's output is purchased by the municipal utility Long Island Power Authority under a 20-year power purchase agreement (PPA). Payments over this 20-year period are expected to total $298 million. The project was recognized for its scale and execution, earning the Best Photovoltaic Project of Year Award from the New York Solar Energy Industries Association. In May 2013, the U.S. Department of Energy published a formal case study on the project, highlighting its significance in regional solar infrastructure (User Prompt).

Technical Specifications

The Long Island Solar Farm utilizes a fixed-tilt photovoltaic array configuration designed for optimal solar irradiance capture in the Upton, New York location. The system comprises 164,312 individual solar panels manufactured by BP Solar. These modules are mounted at a fixed tilt angle of 35° to maximize annual energy yield. The panel rows are spaced approximately 18 ft 4 in (5.59 m) apart to minimize shading losses between adjacent strings, particularly during winter months when the sun’s azimuth is lower. This layout supports the plant’s total installed capacity of 31.5 MW, with a 37-megawatt (49,600 hp) output rating under specific operational conditions.

Electrical Infrastructure

The electrical collection and transformation system is engineered to efficiently aggregate power from the extensive panel array and step it up for grid interconnection. The plant employs 25 inverters, each with a capacity of 1.25 MVA, converting the direct current (DC) generated by the panels into alternating current (AC) suitable for transmission. The collector system operates at 34.5 kV, facilitating the transport of electricity from the field to the main substation. This infrastructure supports the estimated annual generation of 44 GWh, which is purchased by the Long Island Power Authority (LIPA) under a 20-year power purchase agreement.

Technical Parameters Table

Parameter	Value
Panel Count	164,312
Panel Manufacturer	BP Solar
Tilt Angle	35° (fixed)
Row Spacing	18 ft 4 in (5.59 m)
Inverter Count	25 units
Inverter Capacity	1.25 MVA each
Collector Voltage	34.5 kV
Total Capacity	31.5 MW
Output Rating	37 MW (49,600 hp)
Annual Generation	44 GWh

Why it matters

The Long Island Solar Farm holds a distinct place in the history of North American renewable energy infrastructure. This distinction highlighted a significant shift in regional energy generation, moving beyond traditional fossil fuel dominance on the island. The project demonstrated the viability of utility-scale solar power in a densely populated, historically grid-reliant area. Its construction and subsequent operation served as a proof-of-concept for large-scale solar integration in the Northeast. The facility's success encouraged further investment in solar infrastructure across the region. It established a benchmark for capacity and operational efficiency that subsequent projects aimed to match or exceed. The scale of the installation challenged previous assumptions about land use and energy yield in the area.

Recognition and Industry Impact

The project received formal recognition from industry bodies for its execution and design. The New York Solar Energy Industries Association awarded the Long Island Solar Farm the "Best Photovoltaic Project of Year Award". This accolade underscored the technical quality of the installation. The award reflected the effective engineering and construction management involved in the project. Blue Oak Energy engineered the plant, while Hawkeye LLC from Hauppauge, New York, handled the construction subcontracting. The recognition helped elevate the profile of solar energy within the New York market. It signaled to investors and policymakers that solar projects could achieve both technical excellence and operational reliability. The award also highlighted the collaborative nature of the project, involving multiple stakeholders including BP Solar and MetLife. This model of public-private partnership became a reference point for future developments.

Environmental Significance

The environmental impact of the Long Island Solar Farm was a key component of its significance. The facility was projected to abate more than 30,000 metric tons of carbon dioxide emissions per year. This level of carbon abatement contributed substantially to regional climate goals. The project provided enough electricity for roughly 4,500 households, reducing reliance on the local grid's fossil fuel mix. The environmental benefits were quantified and communicated clearly to stakeholders. This transparency helped build public support for solar energy initiatives. The facility's role in carbon reduction aligned with broader state and national efforts to mitigate climate change. It demonstrated that large-scale solar could deliver measurable environmental returns. The project's success provided data and confidence for subsequent environmental impact assessments of similar facilities.

What are the financial terms of the Long Island Solar Farm?

The financial structure of the Long Island Solar Farm is defined by a long-term power purchase agreement (PPA) between the project owners and the municipal utility Long Island Power Authority (LIPA). According to the project documentation, LIPA purchases the plant's output under a 20-year contract. This agreement provides revenue stability for the co-owners, BP Solar and MetLife, through their entity Long Island Solar Farm LLC, while securing a predictable energy cost for the utility.

Power Purchase Agreement Terms

The PPA covers the entire 37-megawatt output of the facility. The annual energy production is estimated at 44 GWh. Over the 20-year term, the aggregate payment of $298 million reflects the cost of this solar energy supply. The agreement was a key factor in the project's development, engineered by Blue Oak Energy with construction subcontracted to Hawkeye LLC. The financial model supports the operation of the 164,312 solar panels from BP Solar, which are mounted at a fixed tilt angle of 35°.

Cost Analysis and Customer Impact

Based on the total payment of 298millionover20yearsandanannualproductionof44GWh,theaveragecostperkilowatt−hourcanbederived.Thetotalenergyproducedoverthecontractlifeis880GWh(44GWh/year×20years).Dividingthetotalcostbythetotalenergyyieldsanaveragepriceofapproximately338.64 per MWh, or $0.33864 per kWh. This rate includes the capital and operational costs passed through to LIPA.

For the end consumers, the cost is distributed across the utility's customer base. The plant provides enough electricity for roughly 4,500 households. However, the total cost of $298 million is spread across all LIPA customers, not just those directly offset by the solar farm. The monthly cost per customer depends on the total number of LIPA subscribers and the allocation of the PPA costs within the utility's rate structure.

Long Island Solar Farm: Infrastructure and Development