PSEG Long Island vs Freeport, RVC, Greenport Electric — Solar Differences

Why the utility serving your address changes everything

Long Island Solar Installation Pros provides solar installation help — we are not a PSEG partner, not a NYSERDA-designated contractor, and not affiliated with any of the municipal electric utilities discussed here. This guide is meant to help homeowners understand which questions to ask before signing a solar proposal.

Most Long Island addresses are served by PSEG Long Island. A meaningful minority are not. The interconnection process, the net-metering math, the rate plan options, and the incentive eligibility can all be different — sometimes significantly. A solar proposal built on PSEG assumptions does not work for a Freeport address, and vice versa. This is the first thing we verify on every assessment.

PSEG Long Island — the default for most LI addresses

PSEG Long Island serves the bulk of Nassau and Suffolk County. According to PSEG Long Island, more than 70,000 Long Island homeowners have rooftop solar PV. Residential solar customers in PSEG territory get a net meter (Time-of-Day options exist) that tracks energy flowing in both directions, and excess generation can earn energy credits that reduce future bills. PSEG also runs a Battery Storage Rewards program that pairs with residential battery installations.

Because PSEG is the default, almost every solar installer on Long Island is set up for PSEG interconnection. Permitting still happens at the town or village level, but the utility side is uniform.

Freeport Electric — Village of Freeport addresses

The Village of Freeport runs its own municipal electric utility, Freeport Electric, separate from PSEG Long Island. Solar interconnection for Freeport addresses goes through Freeport Electric — not PSEG. The application process, program credits, and rate plans are different. We have seen quotes from out-of-area installers that assumed PSEG rules for a Freeport address; the math in those quotes did not survive contact with the actual Freeport Electric program rules.

For a Freeport solar planning conversation, the first sanity check is whether the installer has worked in Freeport before and understands the Village of Freeport permit + Freeport Electric interconnection sequence. The second is whether the proposal models the actual Freeport Electric program credits rather than copy-pasting PSEG net-metering language.

Rockville Centre Electric — Village of Rockville Centre addresses

The Incorporated Village of Rockville Centre operates its own electric utility, Rockville Centre Electric (often called Rockville Centre Electric Department or RVC Electric). It is municipal — separate from PSEG Long Island. Net-metering or program-credit equivalents follow Rockville Centre Electric's own rules, which should be verified for the specific address before relying on PSEG assumptions.

Practically, this means a Rockville Centre solar quote should explicitly reference Rockville Centre Electric and walk through the program rules for that municipal utility. If a quote mentions only "PSEG net metering" for a Rockville Centre address, that is a yellow flag worth surfacing during quote review.

Greenport Municipal Light — Village of Greenport addresses

The Village of Greenport on the North Fork operates Greenport Municipal Light, a separate municipal electric utility. As with Freeport and Rockville Centre, solar interconnection and program credits follow the municipal utility's rules rather than PSEG Long Island's. The relevant volume of solar installs in Greenport is lower than in PSEG territory, so fewer installers have direct Greenport experience — that is a real planning variable for an East End project.

Other LI jurisdictions where utility framework should be verified

Sea Cliff (Village in Nassau), Northport (Village in Suffolk), parts of Great Neck, Fishers Island (Fishers Island Electric Corporation, not PSEG), and several Town of Southold addresses sit in areas where the utility framework should be verified for the specific address before relying on PSEG assumptions. This is not a "gotcha" list — it is a list of places where a few extra minutes of verification at the start of the planning conversation prevents a quote built on the wrong utility framework.

How to verify which utility serves your address

The fastest verification is your most recent electric bill — the utility name is printed at the top. If you cannot find a recent bill, the village or town you live in is usually a strong signal: if you are inside the incorporated Village of Freeport, Freeport Electric. Village of Rockville Centre, Rockville Centre Electric. Village of Greenport, Greenport Municipal Light. Outside those village boundaries (and outside the other carve-outs noted above), PSEG Long Island is the default.

If utility framework is unclear, the planning review pauses on this question before any sizing or savings math. Incentives change and eligibility varies — confirm details with the program administrator and a qualified tax professional. None of this is tax advice.