Long Island Solar Installation Pros — Calculator
PSEG Bill Reduction Calculator
Honest estimate of monthly PSEG Long Island bill reduction from solar — split between the usage portion (offsettable) and the daily fixed grid charges (not offsettable). No '100% offset' promises.
How this calculator works
The estimator splits your monthly electric bill into two pieces: the usage portion (which solar offsets) and the daily fixed charges (which solar does NOT offset). It then models monthly savings against your selected sizing strategy and surfaces the realistic remaining bill — not a "100% offset" headline number.
For the full PSEG Long Island net-metering breakdown, see our PSEG net-metering resource.
Inputs
Use a 12-month average if possible. Summer months on Long Island are typically higher due to AC; winter months on heat pumps are also higher. Average smooths the swing.
Most LI homeowners size for annual usage. Conservative sizing keeps the system smaller; oversized systems generate more credits but those credits are typically valued less than avoided consumption.
Important: solar does NOT eliminate the bill
Solar offsets the USAGE portion of your bill — not the daily service charges, customer charges, or grid-connection fees. Even with a properly-sized solar system, you still receive a monthly bill from PSEG Long Island (or your municipal utility) for those non-offsettable fees. Anyone telling you solar will eliminate your bill entirely is misrepresenting how the math works.
Estimated monthly impact
Estimated monthly savings range
$212–$261
From a $280 starting bill. Annual range: $2,539–$3,136.
Remaining monthly bill (estimated)
$19–$68
Includes ~$18 of daily service charges + grid-connection fees that solar does not offset.
Bill breakdown (estimate)
Fixed-charge estimates are typical residential values for the selected utility. Your actual bill detail varies by rate plan, account type, and billing month.
Want bill-reduction calculated against your real 12 months of PSEG (or municipal) usage?
We'll read your last 12 months of actual bill data, model the seasonal swing, and walk through what solar realistically replaces and what stays on your bill. Plus the rate-plan question — Time-of-Day vs flat — that most proposals skip.
Request a 12-month bill reviewCommon questions
Does solar eliminate my PSEG Long Island bill?
No. Solar offsets the usage portion of your bill — it does not eliminate the daily service charges, customer charges, or other grid-connection fees. Even with a properly-sized solar system, you still receive a monthly bill from PSEG Long Island for those non-offsettable fees. Anyone telling you solar will eliminate your bill entirely is misrepresenting how the math works.
What is a typical PSEG bill reduction from solar?
For a properly-sized solar system on a Long Island home in PSEG service territory, monthly savings typically run 60–85% of the usage portion of the bill, leaving the daily service charges and grid-connection fees. The exact percentage depends on system size, roof exposure, your usage pattern, and your rate plan (Time-of-Day vs flat).
Why does the calculator show a remaining bill even with solar?
Two reasons: (1) PSEG Long Island and the municipal utilities charge daily service fees and customer charges that solar does not offset — even with a 100% production system, those fees remain. (2) Most homeowners do not size for 100% offset; a matched system targets 95% and a conservative system targets 75%. The remaining bill is the sum of fixed fees plus any uncovered usage.
Is it better to oversize the system?
Usually not. An oversized solar system generates more credits, but those credits are typically valued at the wholesale rate (or by net-metering program rules) rather than the retail rate you would have paid for that consumption. The math usually favors a system sized to your actual annual usage — not larger.
How do Freeport Electric, RVC, and Greenport differ from PSEG?
Freeport Electric, Rockville Centre Electric, and Greenport Municipal Light are separate municipal utilities with their own rate structures and program credit rules. Their fixed-charge structures and per-kWh rates differ from PSEG Long Island. A bill-reduction estimate built on PSEG assumptions does not transfer cleanly to municipal-utility addresses.
Want bill reduction modeled against your actual 12 months of PSEG usage?
We'll read your real bill data, model the seasonal swing, and walk through the rate-plan choice — Time-of-Day vs flat — that most proposals skip.