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The U.S. Department of Energy and the North Carolina Clean Energy Technology Center are excited to announce that a new, modernized DSIRE is under construction. The new version of DSIRE will offer significant improvements over the current version, including expanded data accessibility and an array of new tools for site users. The new DSIRE site will be available in December 2014. Staff are currently working hard on the new version of DSIRE but are also maintaining the content of the current version of DSIRE. Thank you for your continued support and patience during this transition. We hope you are as excited for December as we are! The U.S. Department of Energy and the North Carolina Solar Center are excited to announce that a new, modernized DSIRE is under construction. The new version of DSIRE will offer significant improvements over the current version, including expanded data accessibility and an array of new tools for site users. The new DSIRE site will be available in the summer of 2014. Staff are currently working hard on the new DSIRE and are unfortunately only able to make minimal updates to the DSIRE website at this time. We apologize for any inconvenience and thank you for using DSIRE.

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New York

New York

Incentives/Policies for Renewables & Efficiency

Printable Version
Long Island Power Authority - Net Metering   

Last DSIRE Review: 11/08/2012
Program Overview:
State: New York
Incentive Type: Net Metering
Eligible Renewable/Other Technologies: Photovoltaics, Wind, Fuel Cells, CHP/Cogeneration, Anaerobic Digestion, Fuel Cells using Renewable Fuels, Microturbines
Applicable Sectors: Commercial, Industrial, Residential, Nonprofit, Schools, Local Government, State Government, Agricultural, Institutional
Applicable Utilities:LIPA
System Capacity Limit:2 MW for non-residential solar or wind; 500 kW for agricultural wind and 1 MW for agricultural biogas; 25 kW for residential solar or wind; 10 kW for residential micro-CHP and fuel cells
Aggregate Capacity Limit:150 MW for solar, agricultural biogas, residential micro-CHP and fuel cells; 0.3% (15.3 MW) of utility's 2005 demand for wind
Net Excess Generation:Credited to customer's next bill at retail rate, except seasonal avoided for micro-CHP and fuel cells; excess generally reconciled annually at seasonal avoided-cost rate, except annual excess for micro-CHP and fuel cells carries forward indefinitely
REC Ownership:Not addressed
Meter Aggregation:Allowed for non-residential and farm-based customers with solar, wind, and farm-based biogas systems
Web Site:
Authority 1:
Date Effective:
LIPA Tariff Leaf No. 34 et seq.
10/03/2012 (most recent revisions)
Authority 2:
Date Enacted:
Date Effective:
A.B. 5525

Note: In October 2012 the LIPA Board of Trustees adopted changes to the utility's net metering tariff that permit remote net metering for non-residential solar and wind energy systems, and farm-based biogas and wind energy systems. It also adopted a measure to increase the aggregate net metering cap for solar, agricultural biogas, residential micro-CHP and fuel cells from 51.2 MW to 150 MW. The change in the general aggregate net metering cap does not affect the 15.3 MW cap specific to wind energy systems. Please see the full tariff change proposal for further details.

In August 2012 New York enacted legislation (A.B. 9560) expanding remote net metering to include agricultural and non-residential micro-hydroelectric systems. Though LIPA's net metering policy is not governed by the state net metering law, the provisions are designed to mimic state law. Amendments to state law typically result in equivalent amendments to LIPA's net metering tariff.  

In January 2009, the Long Island Power Authority (LIPA) made significant changes to its net metering policy that extended net metering to non-residential customers; expanded system size limits for residential and farm-service customers; and dramatically increased the capacity limit on overall enrollment. Prior to these revisions, net metering was only available for residential photovoltaic (PV) systems of 11 kW or less, residential wind systems of 27.5 kW or less, and farm-service wind systems of 137.5 kW or less. The rules have been updated multiple times, most recently in October 2012, to remain consistent with the evolving terms of the New York State net metering law

Under the most recent revisions, net metering is available for residential, non-residential, and farm-service PV and wind energy systems, farm-service, and residential micro-CHP and fuel cell systems. Eligible systems are subject to the following system capacity limits:

  • Residential: Solar and wind systems up to 25 kW, micro-CHP and fuel cell systems from 1 - 10 kW
  • Farm-Service: Solar systems up to 25 kW, wind systems up to 500 kW, and anaerobic digester systems up to 1 MW
  • Non-residential: Solar and wind energy systems up to 2 MW

Net metering will be made available until overall solar, agricultural biogas, residential micro-CHP and fuel cell system enrollment reaches 150 MW and overall wind enrollment reaches 15.3 MW (0.3% of 2005 peak electric demand) although the utility may expand this limit at its discretion. The 150 MW limit for non-wind systems represents such a change, as the former limit was set at 51.2 MW, or 1% of utility's 2005 peak demand.

Net metering is generally accomplished using a single bi-directional meter, although other arrangements are possible for hybrid systems that combine a solar or wind energy system with an agricultural biogas, micro-CHP, or fuel cell system. For solar, wind, and anaerobic digester systems, net excess generation (NEG) is carried forward from month to month at the customer's retail electricity rate. Excess NEG left over at the end of a 12-month period is purchased by LIPA at the seasonal (winter/summer) avoided cost rates. For residential micro-CHP and fuel cells, NEG is purchased on a monthly basis at the avoided cost rate and any resulting credits carry forward indefinitely.

In October 2012 LIPA adopted tariff changes allowing eligible farm-based and non-residential customer-generators to engage in "remote" net metering of solar, wind, and farm-based biogas systems. The law permits eligible customer-generators to designate net metering credits from equipment located on property which they own or lease to any other meter that is located on property owned or leased by the customer that is within the LIPA service territory and same load zone as the net metered facility. Credits will accrue to the highest use meter first, and as with standard net metering, excess credits may be carried forward from month to month. A change in New York state law enacted in August 2012 extends remote net metering to micro-hydroelectric customer-generators. As LIPA's net metering rules typically replicate state law, further tariff changes reflecting this change may be forthcoming.

Customers on tariffs that include demand charges will only be billed for the measured maximum kW demand actually supplied by LIPA during the billing period. Ownership of renewable energy credits (RECs) is not addressed in the net metering tariff; however, LIPA retains ownership of any RECs produced by systems that participate in the LIPA solar and wind energy rebate programs.

Residential and farm-service customers that install systems of 27.5 kW or less are not required to pay any interconnection charges. Farm-service customers that install larger systems are responsible for paying 50% of the applicable interconnection expenses, and non-residential customers are responsible for 100% of the cost of interconnection. Additional charges may apply in situations where the interconnection requires a dedicated transformer or additional safety equipment. Such charges are limited to $350 - $5,000 for most systems, but are based on actual costs without a limit for non-residential PV systems.

All net metered systems must comply with the equipment and installation specifications contained in LIPA's Interconnection Guide for Independent Power Producers. These guidelines historically required the installation of a utility accessible external disconnect switch (EDS) for all systems. This contrasts with the New York Standard Interconnection Requirements (SIR) for the state's investor-owned utilities, which exempt inverter-based facilities of 25 kW or less from the EDS requirement. In August 2011 New York enacted legislation (A.B. 5525) directing LIPA to conform to this portion of state SIR. LIPA's requirements were subsequently revised. Notably LIPA does not generally require customer-generators to obtain liability insurance for their systems (although they do encourage it). Under certain circumstances, LIPA may require customer-generators to meet additional performance and safety standards, perform additional system tests, or purchase liability insurance beyond that specified in the guide.

  Customer Service - LIPA
Long Island Power Authority
25 Hub Drive
Melville, NY 11747
Phone: (800) 692-2626
Fax: (631) 755-5375
Web Site:
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Disclaimer: The information presented on the DSIRE web site provides an unofficial overview of financial incentives and other policies. It does not constitute professional tax advice or other professional financial guidance, and it should not be used as the only source of information when making purchasing decisions, investment decisions or tax decisions, or when executing other binding agreements. Please refer to the individual contact provided below each summary to verify that a specific financial incentive or other policy applies to your project.

While the DSIRE staff strives to provide the best information possible, the DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. make no representations or warranties, either express or implied, concerning the accuracy, completeness, reliability or suitability of the information. The DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. disclaim all liability of any kind arising out of your use or misuse of the information contained or referenced on DSIRE Web pages.

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