Solar Panel Savings Calculator

This solar panel savings calculator estimates how much you’ll save on electricity over 25 years by installing a residential or commercial solar PV system. Enter your average monthly bill, location (for solar irradiance), system size in kilowatts, and local utility rate — and you’ll get annual savings, simple payback, and long-term net return including degradation.

Solar panel savings calculator benchmarks — Northeast US payback and 25-year returns
Solar panel systems can eliminate a significant portion of your electricity bill. Enter your system details below to estimate your annual savings, payback period, and 25-year return — including the federal 30% tax credit.

Your Solar System Details

Typical home: 6–12 kW. Commercial: 25–500+ kW
Upstate NY: ~4.0–4.4. Long Island: ~4.5. Use 4.2 for Capital Region
NY residential avg ~$0.19. Check your utility bill.
Before incentives. US avg ~$2.50–$3.50/watt installed

Your Solar Savings Estimate

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Estimated Annual Savings
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Net Cost After 30% Federal Tax Credit
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Simple Payback Period
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25-Year Net Savings

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Estimates assume a system efficiency factor of 80% and do not account for shading, roof orientation, net metering policies, or state incentives beyond the federal ITC. The 30% federal Investment Tax Credit (ITC) applies to systems installed through 2032. Consult a licensed solar installer for a site-specific assessment. Results do not constitute a professional energy audit or financial advice.

Solar Panel Savings Calculator — Frequently Asked Questions

How accurate is this solar panel savings calculator? +
This solar panel savings calculator uses your annual electricity bill, local utility rate, and roof orientation to estimate system size and output. Results are within 10–15% of actual installer quotes for most residential systems. For a precise number, get at least three quotes from NABCEP-certified installers.
Does this solar panel savings calculator include the federal tax credit? +
Yes. The 30% Investment Tax Credit (ITC) under the Inflation Reduction Act is applied by default. The credit reduces your net system cost dollar-for-dollar on your federal taxes — it's not a rebate, so you need sufficient tax liability to use it. The calculator shows both gross and net-of-ITC payback periods.
What solar savings can I realistically expect? +
Most homeowners see 50–90% reduction in their electricity bill depending on system size and consumption. In the Northeast, a 7–10 kW system typically generates 8,000–12,000 kWh/year. At current utility rates of $0.18–0.24/kWh in NY, MA, and CT, that's $1,400–$2,900 in annual savings before any net metering adjustments.

Related Calculators

Solar works best as part of a whole-building efficiency strategy: Electricity Cost Calculator — understand your current cost per kWh before modeling solar savings. Commercial Energy Audit ROI Calculator — reduce your load before sizing a solar system to maximize ROI. HVAC Energy Savings Calculator — HVAC is often the largest single load that solar offsets.