Solar Cost for a Split-Level Home
Est. net savings
$24,900
Over 25 Years (Modeled) · no federal credit
Typical result:
- 20–25 panels
- 8.5 kW system
- $22,100–$29,750 before incentives
- ~11.7 year simple payback
25 years without solar vs with solar
Scenario: a 2,100 sq ft home. Assumes 3%/yr rate increases, 0.5%/yr panel degradation and no federal tax credit (the 30% §25D credit ended for systems installed after Dec 31, 2025). How we calculate
Without solar
25-year utility bills
$48,250
Rates rise ~3% per year
With solar
System cost + remaining bills
$23,375
Installed cost, no federal credit
Difference
Estimated 25-year net
+$24,875
Before any state or utility incentives
What Does Solar Cost for a Split-Level Home in 2026?
A split-level home typically needs an 8–10 kW system. At $2.60 per watt (EnergySage’s average marketplace quote) to $3.50 per watt (the 2024 median cash price in Lawrence Berkeley National Laboratory’s Tracking the Sun data), an 8.5 kW system costs about $22,100–$29,750 before incentives. This guide uses $2.75 per watt (~$23,400) as its reference case.
Why the gap between sources? EnergySage reports that its average quote runs well below LBNL’s median cash price, and the two datasets draw on different samples of buyers. Treat the low end as what a well-shopped job can cost, and the high end as what you may pay if you accept the first offer.
Split-level homes add one wrinkle that single-plane roofs don’t have: multiple roof sections at different heights. That can mean extra racking, longer wire runs between levels, and more labor, but the size of that extra cost varies by installer and roof. Ask for a line-item quote rather than assuming a standard premium.
Within one market, prices also vary. On EnergySage’s state pages, the “good price” and “high price” bands sit roughly 15% below and above the state average. In New York, for example, a typical 11.99 kW system averages about $33,033, with a range of $28,078–$37,988.
Chart summary: Among these five states, quoted prices span $2.25 to $2.75 per watt, a gap of 50 cents. On an 8.5 kW system, that is about $4,250 of difference before incentives. EnergySage’s averages reflect marketplace quotes, which its own data show run below LBNL’s national median, so your local installer may quote higher.
To get a figure for your own roof, enter your monthly kWh use into our solar system size calculator before you call any installer.
Solar vs utility company · 25-year comparison
25-year totals for a 2,100 sq ft home: 3%/yr rate increases, 0.5%/yr degradation, no federal credit. Methodology
Total utility payments
$48,250
Total solar cost (installed + remaining bills)
$23,375
Net savings
+$24,875
Avg. monthly difference
+$83/mo
Solar Panel Cost by System Size: What Size Do You Need?
Match system size to your annual electricity use and your local sun. The right size equals your yearly kWh divided by the kWh each kilowatt produces where you live. NREL’s PVWatts calculator shows that peak sun hours range from under 4 per day in parts of the Pacific Northwest to over 6 in the Desert Southwest, which can change the system size you need by 30% or more.
The table below uses 4.5 peak sun hours per day, a 20% system loss factor, $2.60–$3.50 per watt, and the 18.34¢/kWh U.S. average residential rate (EIA, June 2026).
Solar Panel Cost by System Size for a Split-Level Home (2026)
| System Size | Approx. Panels (400 W) | Est. Cost Before Incentives | Est. Annual Output | First-Year Bill Savings |
|---|---|---|---|---|
| 6 kW | 15 | $15,600–$21,000 | ~7,900 kWh | ~$1,450 |
| 8 kW | 20 | $20,800–$28,000 | ~10,500 kWh | ~$1,930 |
| 10 kW | 25 | $26,000–$35,000 | ~13,100 kWh | ~$2,410 |
| 12 kW | 30 | $31,200–$42,000 | ~15,800 kWh | ~$2,890 |
Savings assume every produced kWh offsets a retail-priced kWh. Real savings are lower if your utility pays less than retail for exported power.
Most split-level homeowners land between 8 and 10 kW, large enough to cover a two-level home’s heating, cooling, and appliance load but sized to the usable roof sections. If your upper roof faces south and a lower section faces east or west, a good installer will place panels to balance output across the day instead of simply filling every surface. For related sizing math, see our guide on how many solar panels an 1,800 sq ft home needs.
Panel output declines slowly over time. An NREL analysis of field data found a median degradation rate of about 0.5% per year, which this guide uses for its 25-year estimates.
Is There a Federal Solar Tax Credit in 2026?
No, not for homeowners who buy a system in 2026. The 30% Residential Clean Energy Credit (Section 25D) ended for expenditures made after December 31, 2025, under the One Big Beautiful Bill Act signed July 4, 2025. The IRS Residential Clean Energy Credit page is the authoritative source for the current rules.
What that means in practice:
- Buying with cash or a loan in 2026: no federal residential credit applies to your purchase. Installers who still advertise “30% off” for 2026 purchases are using outdated information.
- If you installed in 2025: you could claim the credit on your 2025 return. Unused credit from an eligible 2025 project can generally be carried forward to later tax years.
- Leases and power purchase agreements (PPAs): the company that owns the system may still qualify for the commercial Section 48E credit if the system is placed in service by the end of 2027 or met the July 4, 2026 start-of-construction rule. Whether any of that value reaches you depends on the provider’s pricing, so compare the contract terms carefully.
- State, local, and utility incentives: these still exist in many places and now matter more. The DSIRE database lists active programs by state. Some programs are first-come, first-served, so check availability before you sign.
Without the federal credit, your net cost equals the full installed price, so the quote itself is the number that matters. Our solar tax credit calculator can help you model state-level incentives that apply to your address.
Solar Savings and Payback Period by State
At the U.S. average residential rate of 18.34¢/kWh (EIA, June 2026), an 8.5 kW system producing about 11,200 kWh a year saves roughly $2,050 in year one. With 0.5% annual degradation and flat electricity rates, that adds up to about $48,250 of avoided power costs over 25 years, or about $24,900 after subtracting a $23,375 purchase price. Simple payback comes out near 11.7 years.
Your rate matters most. Using EIA’s Electric Power Monthly residential prices for June 2026, the same 8.5 kW system would save about $3,880 a year in California (34.74¢), $2,790 in New Jersey (24.95¢), $2,720 in Connecticut (24.32¢), $1,780 in Texas (15.94¢), and $1,690 in Florida (15.10¢).
Net metering decides how much of that you actually keep. Where utilities credit exported power at full retail rates, savings track the numbers above. Where they pay a lower export rate, as California has since its 2023 rule change, savings are lower unless you use more of your solar power at home or add a battery. Always read your utility’s current tariff before you sign.
Chart summary: Electricity price drives payback more than installed cost does. New York has the highest quoted price of the five states ($2.75 per watt) yet the shortest payback (about 7.1 years), because its residential rate is 29.49¢/kWh. Colorado’s payback is the longest (about 11.8 years). This is a simplified model: it uses the same 4.5 sun hours in every state, which overstates output in cloudier northern states, and it ignores rate increases, financing costs, and inverter replacement.
Chart summary: With flat electricity rates, cumulative cash flow turns positive in year 12 and reaches about +$24,900 by year 25 after the $23,375 purchase. If rates rise 3% a year (an assumption, not a forecast), break-even moves to year 11 and the 25-year total grows to about $46,500. The gap shows how much your utility’s future rate increases matter, so test both cases in your own quote.
Use our solar payback calculator to model your own system size, local rate, and incentives.
How to Get the Best Solar Price for a Split-Level Roof
Get at least three quotes for the same system size and compare them in dollars per watt. Installers price differently, and EnergySage’s own analysis finds its competitive marketplace averages about $1 per watt below the LBNL national median, which on an 8.5 kW system is a difference of roughly $8,500. The two datasets measure different things, so the exact gap for you will differ, but the direction is a good reason to shop around.
When you review proposals:
- Compare price per watt, not total price, because installers often quote different system sizes.
- Ask about the split-level layout: which roof sections get panels, what tilt and direction the design assumes, and whether the fixed price covers extra racking or wiring between levels.
- Confirm equipment and warranties: panel and inverter models, the product warranty, the output warranty, and the workmanship warranty.
- Ask about inverter type: microinverters or optimizers can help when panels face different directions or get partial shade, which is common on multi-level roofs.
Why do solar quotes differ so much? Labor rates, overhead, sales costs, warranty terms, and installation method account for most of the gap, while equipment prices vary less. Make sure competing quotes cover the same system size and equipment tier before you compare totals.
For financing, paying cash generally gives the lowest lifetime cost because there is no interest. Without the federal credit, loan costs matter more: compare the APR and ask whether a dealer fee is built into the loan’s price, since that raises what you actually pay. Use our solar loan calculator to compare terms.
Sources and Methodology
Last updated October 2, 2026. Prices per watt come from EnergySage state cost pages (September–October 2026) and Lawrence Berkeley National Laboratory’s Tracking the Sun report (2024 median cash price). Electricity rates come from the U.S. Energy Information Administration’s Electric Power Monthly, Table 5.6.A (June 2026). Tax credit status comes from the IRS Residential Clean Energy Credit page and the One Big Beautiful Bill Act. Panel degradation of 0.5% per year comes from NREL’s published review of field data.
Calculations use an 8.5 kW system, 4.5 peak sun hours per day, a 20% system loss factor (about 11,169 kWh in year one), 0.5% annual degradation, flat electricity rates, and full retail credit for all output. They exclude inverter replacement, maintenance, insurance, financing costs, and any state or local incentives. This guide is general information, not tax or financial advice, so confirm incentives with your installer and a tax professional.
Frequently asked questions
Direct answers for US homeowners — sized for a 2,100 sq ft home.
Same usage, bill-based guide
Your Split-Level Home target maps to roughly a $150/month electric bill nationally.
$150 $150/month electric bill guideHow these numbers were calculated
- Electricity rate
- 18.19¢/kWh — US average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
- Solar production
- 4.5 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
- Installed price
- $3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
- Federal tax credit
- $0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
- Net metering
- National blend — solar assumed to offset 75% of the bill (87% in full-retail net-metering states, 55–70% elsewhere).
- Square footage
- Used only as a rough usage proxy: 2,100 sq ft × 0.4495 kWh/sq ft/month. EIA: average US residential customer used about 899 kWh/month (2022). Site assumption: that usage corresponds to a ~2,000 sq ft home (0.45 kWh per sq ft per month). Square footage is only a rough proxy — size from your actual kWh.
- Model
- Version 2026.10 · 3%/yr electricity price escalation · 0.5%/yr panel degradation · simple payback = installed cost ÷ year-1 savings
- Policy checked
- · Full methodology · Report an error
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.