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Section 487 of the New York State Real Property Tax Law provides a 15-year real property tax exemption for solar, wind energy, and farm-waste energy systems constructed in New York State. As currently effective, the law is a ''local option'' exemption, meaning that local governments are permitted decide whether or not to allow it. The exemption was mandatory prior to a 1990 reenactment in which the local option clause was added.

Long Island Power Authority offers a variety of incentives for its non-residential customers to increase the energy efficiency of facilities through the Commercial Efficiency Program. Major renovations of existing buildings and new construction projects are both eligible for this program, with new construction incentives being slightly reduced compared to existing building incentives. There are several paths to choose from in the program, each one designed to fit the needs of a particular customer.

: 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.

LIPA offers its customers rebates for grid-connected photovoltaic (PV) systems as part of the Solar Pioneer and Solar Entrepreneur programs.

As a municipal utility, the Long Island Power Authority (LIPA) is not obligated to comply with the [http://www.dsireusa.org/library/includes/incentive2.cfm?Incentive_Code=N... New York Renewable Portfolio Standard (RPS)]. The LIPA Board of Trustees has nevertheless decided to make their own renewable energy commitment mirroring the requirements for New York’s investor owned utilities.

Long Island Power Authority offers a variety of incentive programs which help residential customers upgrade to more energy efficient equipment and appliances in their homes. The Cool Homes Program provides rebates for both homeowners and contractors for the installation of energy efficient central air conditioning systems and air-source heat pumps. Prescriptive rebates are also available a wide range of efficient appliances and products including:

The Long Island Power Authority (LIPA) is now offering homeowners rebates for the installation of solar water heaters. In order to qualify for a rebate, the customer must have an existing electric hot water heater and take electric service from LIPA under an eligible rate code. The FAQ on the program web site contains information on eligible rate codes and rate changes. The rebate level is set at $20 per kBTU as determined by the SRCC collector rating, up to a maximum of $1,500 or 50% of installed project costs.

The Long Island Power Authority's (LIPA) Solar Initiative Feed-in Tariff (FIT) program provides fixed payments for electricity produced by approved photovoltaic systems over a fixed period of time. The program operates under a sell-all arrangement, where the full amount of energy production from the facility is sold to the utility (i.e., no on-site use). Systems from 50 kilowatts (kW) to 20 megawatts (MW) that were not connected to the grid prior to July 16, 2012 are eligible to participate.

'''''Note: The program web site listed above is for the residential wind energy program; however, LIPA also offers [http://www.lipower.org/commercial/efficiency/wind.html incentives for non-residential wind energy installations].'''''

'''''Note: Under the American Recovery and Reinvestment Act (ARRA) of 2009, the U.S. Department of Energy (DOE) is providing a total of $300 million to U.S. states, U.S. territories and the District of Columbia to establish rebate programs for new energy-efficient appliances that replace existing appliances in homes. This program was established in order spend out funds remaining from the residential rebate program. The program will be available through February 1, 2013 or until funds are exhausted. '''''