Example builds · Illustrative scenarios

What a typical Long Island solar build looks like.

Every roof is different — orientation, usage, shade, budget. Below are five worked examples showing how a north-shore home gets sized, what hardware goes on it, and how the payback math comes out.

Get your own numbers Call (631) 759-8716

Please read this first

These are illustrative examples, not records of specific completed projects. Each one is modelled on typical Long Island home types, system sizes, PSEG Long Island rates, and the New York State credit available in 2026 (the federal residential credit ended December 31, 2025 and is not counted). The numbers are projections built from that math — they are not measured results from a particular customer's home, and no customer is being quoted or identified anywhere on this page.

Your own numbers will differ. Send us your actual LIPA bill and we will model your roof specifically.

Rooftop solar array of the kind described in this Greenlawn, NY example

Greenlawn, NY · example scenario

Greenlawn ranch · 8 kW system + Powerwall

Starting point

  • 3-bed ranch, 1,900 sqft, electric heat pump + central AC
  • LIPA bill averages $280/mo, peaking $420 in August
  • South-facing roof, 8-year-old shingles, no tree shading

System spec

  • 8.4 kW system — 22 × Q Cells Q.PEAK DUO 380W panels
  • Enphase IQ8+ microinverters (panel-level monitoring)
  • Tesla Powerwall 3 (13.5 kWh) added for outage backup

Projected result

  • PSEG bill projects to $18/mo (minimum delivery charge only)
  • Powerwall covers fridge, lights, internet, central AC during outages
  • Annual savings $3,150 — the solar pays back in about year 7 after the NY State credit; the Powerwall is an outage-coverage cost, not a payback item
Rooftop solar array of the kind described in this Northport, NY example

Northport, NY · example scenario

Northport Village · 6.6 kW low-profile install

Starting point

  • 1920s village home, 1,400 sqft, oil heat + window AC
  • LIPA bill averages $145/mo year-round
  • Historic district — Village Building Department review required

System spec

  • 6.6 kW system — 18 × all-black SunPower M-series panels
  • SolarEdge string inverter with optimizers
  • Low-profile black-on-black panels for aesthetic compliance

Projected result

  • PSEG bill projects to ~$22/mo on average across the year
  • Annual savings $1,475 — payback in about year 10 after the NY State credit (a small system on a low bill pays back slowest)
  • Historic-district review adds roughly 3 weeks to the permit timeline
Rooftop solar array of the kind described in this Huntington Station, NY example

Huntington Station, NY · example scenario

Huntington Station · 10 kW + storm-backup Powerwall

Starting point

  • 4-bed split-level, 2,400 sqft, gas heat + central AC
  • LIPA bill averages $340/mo, frequent storm outages
  • Repeat multi-hour outages — fridge + freezer loss each time

System spec

  • 10.2 kW system — 27 × REC Alpha Pure-R 380W panels
  • Tesla Powerwall 3 paired (13.5 kWh)
  • Enphase IQ8M microinverters

Projected result

  • PSEG bill projects to ~$24/mo on average; battery picks up the load within ~1 second of an outage
  • Annual savings $3,750; the solar pays back in about year 7 after the NY State credit, the battery is priced for outage coverage
  • Battery sized to carry lights plus heat-pump auxiliary through a multi-hour nor'easter outage
Rooftop solar array of the kind described in this Cold Spring Harbor, NY example

Cold Spring Harbor, NY · example scenario

Cold Spring Harbor estate · 14 kW, multi-string

Starting point

  • 5-bed colonial, 4,200 sqft, geothermal + pool heater
  • LIPA bill averages $580/mo, peak $890 in summer
  • Lloyd Harbor Architectural Review Board approval needed

System spec

  • 14.4 kW system — 36 × SunPower X-series 405W (industry-best efficiency)
  • SolarEdge HD-Wave inverter with module-level power electronics
  • Two-roof-plane install (south + west) maximized output

Projected result

  • PSEG bill projects to drop 78% — average $128/mo
  • Annual savings $5,420; payback in about year 7 after the NY State credit
  • Low-profile black-on-black panels specified for Lloyd Harbor ARB review
Rooftop solar array of the kind described in this Centerport, NY example

Centerport, NY · example scenario

Centerport service rescue · failed inverter recovery

Starting point

  • Existing 7 kW system from 2017 — original installer out of business
  • System producing zero for 4 months, monitoring app showing "offline"
  • PSEG bill back to pre-solar levels: ~$220/mo

System spec

  • Diagnostic: failed SMA string inverter (out of warranty)
  • Replaced with Enphase IQ Combiner + IQ8 microinverters
  • Brought monitoring back online; added Enphase IQ Battery 5P (5 kWh)

Projected result

  • System projects to produce at 102% of original spec (microinverters more efficient than the old string setup)
  • PSEG bill projects back to ~$28/mo; battery handles outage backup
  • Total repair + battery upgrade: about $11,400 — recovered in about year 5 from the restored production, vs replacing the system entirely (~$22k)

Your roof, your math

The examples above are generic. Your quote won't be.

We use your actual LIPA bill, your actual roof, your actual usage to size the system and project the payback. No two quotes look the same — and that's the point. Send us your numbers and we'll send back yours.

Want to talk first? Call (631) 759-8716

Solar across NY north-shore towns

Huntington Solar in Huntington Huntington Station Solar in Huntington Station Greenlawn Solar in Greenlawn Northport Solar in Northport Cold Spring Harbor Solar in Cold Spring Harbor Centerport Solar in Centerport

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