The NY-Sun block here closed a decade ago
NY-Sun pays a declining per-watt incentive through regional megawatt blocks that close permanently once their allocation fills. Long Island was the first region to close its standard residential block, in April 2016.
So a Long Beach household above the affordable-solar threshold receives no NY-Sun per-watt incentive. Any quote including one is describing a programme that closed here before most current solar guidance was written.
The low-to-moderate income track does remain, for households under 80 percent of area median income, reported at $0.40 per watt on Long Island against $0.80 in the Con Edison and Upstate regions. If you might qualify, that is worth establishing early rather than assuming away.
What is left for everyone else is the New York State Solar Energy System Equipment Credit: 25 percent of qualified expenditure capped at $5,000, claimed on Form IT-255, with unused credit carrying forward up to five years. Since Section 25D ended, that is effectively the only tax credit in a New York purchase.
How PSEG Long Island credits what you send back
Net excess generation is carried forward month to month at your retail electricity rate, which is favourable and is the arrangement most homeowners assume they are getting.
The part to understand is the year end. Excess left over after a twelve month period is purchased by PSEG Long Island at avoided cost rates, which sit well below retail.
That asymmetry sets the sizing ceiling. Within the year a credit offsets a purchase at full value, but a surplus surviving to the annual reconciliation converts to cash at a fraction of it, so building well beyond your annual consumption gives value away once a year.
Ask what percentage of your annual usage the proposed system covers and how the annual reconciliation was treated in the savings model. A projection carrying surplus forward at retail indefinitely has made an assumption worth seeing stated.
Flood elevation is an equipment question, not just a building one
Panels sit on the roof, but inverters, disconnects, batteries and metering equipment do not necessarily. On a low-lying barrier island, where that hardware is mounted matters.
Ask your installer where each component will go and at what height, and ask them to relate that to the flood elevation for your address rather than to a general sense that the equipment is high enough.
This is the detail that turns a repairable storm into an expensive one. Roof-mounted panels are engineered for wind; ground-level electrical equipment in a surge zone is a different exposure entirely.
If storage is in the design, ask specifically where the battery goes. A battery in a garage or basement on a barrier island is a decision to make deliberately rather than by default.
Wind engineering, and telling your insurer
Coastal Nassau County carries high wind design requirements, which drive the racking, the number of attachment points and which products can be used. That is a real cost difference and it is why two quotes for the same roof can diverge.
Ask what wind speed the system is designed for and what product approvals the components carry, and ask to see the engineering documentation the permit process requires rather than accepting a verbal assurance.
Speak to your insurer before signing, not at renewal. Ask whether the array is covered under your existing policy or must be scheduled, whether the premium changes, and whether the insurer has requirements about attachment.
Settle the roof first if it is near the end of its life. Removing and reinstalling an array to replace the roof beneath it is an avoidable cost, and on a coastal roof it is not a job you want to do twice.