How Long Island homeowners actually pay for solar.

The four financing paths on Long Island, ranked by payback

Solar pays for itself in 5–7 years on current LIPA rates regardless of how you pay for it. But the financing structure changes how MUCH money you keep over the 25-year system life. Here's how each option actually works for a typical Huntington household.

1. Cash purchase — best 25-year return

You pay the full system cost upfront ($24,000–$28,000 for a typical 8 kW residential install). You collect every incentive: 30% federal credit, 25% NY State credit, NYSERDA rebate. Net out-of-pocket lands around $12,000–$15,000. Payback in 5–7 years; the remaining 18–20 years are pure savings.

Best for: homeowners with the cash sitting in a checking or savings account earning near-zero interest. The "yield" on a solar purchase (annual LIPA savings ÷ net cost) typically beats 12-15% — better than the broad stock market average and dramatically better than any savings account.

2. Solar loan — best for most LI homeowners

You borrow the system cost, typically over 20 or 25 years at 5.99–8.99% APR (current LI market). You own the system from day one, so you keep all the tax credits and incentives. Monthly loan payment usually lands under the PSEG bill it replaces — you're net positive from month 1.

The math sweet spot: take the federal + NY State tax refunds (typically $9,000– $12,000 combined) and pay down the loan principal in year 2. That cuts the loan term roughly in half. After payoff, every kWh the panels produce is pure savings for the remaining 18–20 years.

3. Lease — fixed-monthly hands-off

A third-party (typically Sunrun, Sunnova, or a local financier) owns the system on your roof. You sign a 20-to-25-year lease and pay them a fixed monthly rate to use the solar electricity. They keep the federal + NY State tax credits because they own the equipment.

Best for: homeowners who don't owe enough federal tax to use the 30% credit (low AGI, retirees, non-profits, some self-employed), or who simply want the hands-off experience. Lease lifetime savings are typically 15-25% less than owning, but you avoid all upfront cost and maintenance liability.

4. PPA (Power Purchase Agreement) — pay per kWh

Like a lease but instead of a fixed monthly, you pay per kWh of solar production at a rate below your current PSEG rate. The third-party owns the system + takes the incentives. Your payment varies with sun (high in summer, lower in winter), which can be appealing or annoying depending on your temperament.

PPAs are more common on commercial installs than residential on LI. For homes they're roughly equivalent to leases in total savings.

The hidden cost: locked-in rate vs PSEG escalation

PSEG Long Island electricity rates have risen 4-6% annually for the last decade. That compounds: a $200/month bill today is realistically a $400/month bill in 12 years. Solar locks in your effective rate at $0.04-$0.07/kWh (the financed equivalent of net-of-incentives cost spread over the system life) versus PSEG's $0.24/kWh and climbing.

That's why "payback period" undersells the value. A 5-7 year payback today is actually a 3-5 year payback if you model realistic PSEG rate increases over the system life.