Long Island Solar Installation Pros
Solar Calculators for Long Island Homeowners
Five planning tools for the questions most installer proposals skip — system size, NY tax credit, payback period, battery sizing, and bill reduction. Built around PSEG Long Island and the municipal-utility carve-outs.
Why we built these
Most online solar calculators inflate the numbers. They assume a federal credit that no longer applies in 2026, they promise "100% bill offset" that ignores non-offsettable grid charges, they bake in optimistic rate-inflation assumptions, and they refuse to surface municipal-utility differences.
These calculators try the opposite. They surface what installers usually leave out — the federal credit sunset, the fixed-charge portion of your PSEG bill, the difference between Freeport Electric and PSEG net metering, the gap between sizing strategies. The output is a planning estimate, not a sales pitch.
For the math walked through against your real installer quote, request an itemized assessment.
Solar Savings Snapshot
Quick planning snapshot — system size range, monthly bill offset range, NY 25% credit estimate, battery and roof-readiness notes. Best starting point if you are early in the process.
Open calculator →IncentivesNY Solar Tax Credit Estimator
Model the New York State 25% residential solar credit ($5,000 cap) for a specific project cost. Year-one application + five-year carryforward. Federal sunset-aware.
Open calculator →PaybackSolar Payback Calculator
Simple payback range from system kW, project cost, utility, and shade. Surfaces municipal-utility caveats. No rate-inflation assumption baked in.
Open calculator →BatteryHome Battery Sizing Calculator
Plan critical-loads vs whole-home backup by selecting the loads you want to keep running (refrigerator, sump, well pump, lighting, internet) and the outage duration.
Open calculator →BillPSEG Bill Reduction Calculator
Honest split of monthly bill into usage portion (offsettable) and fixed grid charges (not offsettable). No "100% offset" headline numbers.
Open calculator →Want the calculators walked through with a real planning conversation?
We'll model your specific roof, your last 12 months of PSEG (or municipal utility) bills, and the financing structure you're considering — in writing.