Installing solar panels on a 1,700 sq ft home costs $14,000 to $20,000 before incentives in 2026, or roughly $2.80 to $3.20 per watt installed. After applying the federal 30% Investment Tax Credit (ITC), that range drops to approximately $9,800 to $14,000 — and many homeowners in high-sun states see total out-of-pocket costs even lower once state rebates stack on top. For a home this size, most households in the US need a 6 kW to 9 kW system, depending on local electricity rates, appliance loads, and roof orientation.
Three variables move that number more than anything else: your average monthly kWh consumption, your state’s peak sun hours, and whether you add battery storage. A home in Phoenix averaging 1,100 kWh/month needs a meaningfully different system than the same-sized home in Seattle averaging 800 kWh/month. The sections below walk through each driver so you can estimate your real cost — not just the national average.
⚡ System Size
How Much Do Solar Panels Cost for a 1,700 sq ft Home?
For a 1,700 sq ft house with average US energy consumption, the most common system size is 7 kW to 8 kW. At the national average installed price of $3.00 per watt reported by NREL’s 2025 Residential Solar Cost Benchmark, that puts the gross cost at $21,000 to $24,000 for an 8 kW system — though competitive quotes in 2026 often land closer to $2.70–$2.90 per watt, bringing a 7 kW system to roughly $18,900 to $20,300.
The federal Solar Investment Tax Credit cuts 30% off your federal tax liability in the year you install. On a $19,000 system, that’s a $5,700 credit, reducing your effective cost to $13,300. This is a tax credit, not a rebate — you need sufficient federal tax liability to capture it in a single year, though it can be carried forward to the following tax year.
A common question is why solar quotes vary so widely between installers. The answer lies in component specs: a quote using tier-1 monocrystalline panels with microinverters will run $2,000–$4,000 more than one using budget panels with a string inverter, even at identical system size. Here’s what goes into the installed price:
Solar Panel Cost Breakdown — 7 kW Residential System (2026)
Cost Component
Typical Share
Dollar Range (7 kW)
Solar panels
30–35%
$5,700–$6,650
Inverter(s)
10–12%
$1,900–$2,280
Labor & installation
25–30%
$4,750–$5,700
Permits & inspections
5–8%
$950–$1,520
Wiring, racking, misc.
10–15%
$1,900–$2,850
Total (before ITC)
$19,000–$21,000
Monocrystalline panels — the dominant residential choice in 2026 — carry higher efficiency (20–23%) and longer warranties (25 years) than older polycrystalline options. String inverters are cheapest; microinverters add $800–$1,500 but give panel-level monitoring and shade tolerance. Use our solar system size calculator to model the exact kilowatt capacity your home needs before you request quotes.
Solar panel cost breakdown for a 7 kW residential system (2026). Labor and panels together account for more than 55% of installed price. Source: NREL 2025 Residential Solar Cost Benchmark.
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Solar vs utility company · 25-year comparison
Total cost of staying on the grid vs owning solar for a $300/month bill (national average assumptions).
Solar Panel Cost by System Size for a 1,700 sq ft House
The right system size depends on how much electricity your home actually uses — not just square footage. According to the U.S. Energy Information Administration, the average US home uses about 10,500 kWh per year, but a 1,700 sq ft home with efficient appliances might use 8,000–9,500 kWh, while one with electric heat or a pool could exceed 14,000 kWh.
Use this formula as a starting point:
System size (kW) = Annual kWh ÷ (Peak Sun Hours × 365)
For a home using 9,500 kWh/year in a state with 4.5 peak sun hours daily: 9,500 ÷ (4.5 × 365) = 5.8 kW — round up to a 6 kW system.
Solar System Size vs. Cost After 30% ITC (2026)
System Size
Gross Cost
After 30% ITC
Best For
5 kW
$13,500–$16,000
$9,450–$11,200
Low-use home, high-sun state
6 kW
$16,200–$18,600
$11,340–$13,020
Average US home, South/Southwest
7 kW
$18,900–$21,700
$13,230–$15,190
Average US home, Midwest/Mid-Atlantic
8 kW
$21,600–$24,800
$15,120–$17,360
Higher use, Northeast, or EV charging
9 kW
$24,300–$27,900
$17,010–$19,530
High use, cold climate, battery prep
Homeowners adding an EV charger or planning to electrify heating should size up by at least 15–20% to avoid under-producing. Panel degradation also matters at sizing time: at 0.5–0.7% annual output loss per NREL data, a system producing 10,000 kWh in year 1 will produce roughly 8,700 kWh in year 25 — so slightly oversizing recovers for that loss over the warranty period. Our solar savings calculator lets you enter your actual utility bill and location to estimate the right capacity and first-year savings.
⚡ System Size
Solar Panel Cost After the 2026 Federal Tax Credit and State Incentives
The federal ITC remains at 30% through 2032 under the Inflation Reduction Act. On a $20,000 system, that’s a $6,000 reduction in federal taxes owed. SEIA projects this credit will continue to drive installations through the decade, with residential solar capacity growing 14% year-over-year in 2025.
Beyond the federal credit, state and utility incentives vary widely and can reduce net cost by an additional 5–20%:
California (/states/ca/): Net Energy Metering 3.0 now exports energy at reduced rates, making self-consumption more valuable. Select CPUC-regulated utility programs add $500–$1,000 in upfront rebates.
New York (/states/ny/): The NY-Sun Megawatt Block incentive pays $0.20–$0.40/W; combined with the federal ITC, effective cost can drop 40–45% below gross price.
Texas (/states/tx/): No state income tax means the ITC applies only to federal liability, but many utilities offer property tax exemptions on solar equipment and net metering programs.
Florida (/states/fl/): Solar equipment is exempt from the state’s 6% sales tax, saving $840–$1,200 on an average system.
Massachusetts (/states/ma/): The SMART program pays a per-kWh incentive for 10 years, often worth $2,000–$4,000 over the program term.
A question homeowners frequently ask is whether solar is worth it without net metering. In states where net metering has been reduced — like California under NEM 3.0 — the answer shifts toward self-consumption: pairing solar with a battery storage system or time-shifting loads to daytime hours recovers much of the lost export value. DSIRE tracks all active state incentive programs and is updated regularly — always verify current availability before signing a contract. Use our solar tax credit calculator to model the combined federal and state impact on your net cost.
📈 Payback Period
How Long Does Solar Payback Take for a 1,700 sq ft Home?
Payback period is the number of years before cumulative savings equal your net system cost. For a 7 kW system at $19,000 gross ($13,300 after ITC), saving $1,400/year in electricity at $0.14/kWh average retail rate, payback takes roughly 9.5 years. In high-rate states like California or Massachusetts — where retail electricity averages $0.25–$0.32/kWh — the same system pays back in 6–7 years.
After payback, a well-maintained system generates effectively free electricity for its remaining life. Most tier-1 panels carry a 25-year performance warranty and degrade only 0.5–0.7% per year. A solar loan changes the math: a $13,300 loan at 6.99% over 12 years adds roughly $3,100 in interest, extending true payback to about 12 years and reducing 25-year net savings by the same amount.
25-year cumulative cash flow for a 7 kW solar system after the 30% ITC. Break-even occurs around year 10 at average US electricity rates. Source: NREL, EIA 2026.
A cash purchase maximizes long-term return by eliminating interest entirely. Our solar payback calculator models your specific break-even year based on your utility rate, location, and financing choice.
💰 System Cost
Is Solar Worth the Cost in Your State in 2026?
Whether solar is financially worth it depends primarily on your utility electricity rate. The national average was $0.164/kWh in late 2025 per EIA data, but rates range from $0.10/kWh in Louisiana to over $0.30/kWh in Hawaii and parts of New England. Every additional cent per kWh shortens payback by roughly 6–8 months on a typical 7 kW system.
States With the Strongest Solar Financial Case (2026)
States with lower utility rates — Louisiana, West Virginia, Oklahoma — typically see 12–16 year payback periods. Solar still delivers lifetime positive returns in those states, but the financial urgency is lower. Roof condition, shading, and remaining roof life also affect whether installation makes sense now versus at your next re-roof. For homeowners on the fence, a strong net metering policy is the single biggest factor in whether residential solar pencils out. Getting three or more competing quotes reduces your installed cost by an average of 10–15% according to SEIA research — that step alone can shave a full year off payback.
Use our solar ROI calculator to model your lifetime return before you start reaching out to installers.
Related calculators
Free tools for US homeowners — instant results, all 50 states.
Direct answers for US homeowners — sized for a 1,700 sq ft home.
A 7 kW solar system on a 1,700 sq ft home typically produces 700–1,050 kWh per month depending on location. At the average US retail rate of $0.164/kWh, that equals **$115–$172 in monthly savings**. In high-rate states like California or Massachusetts, monthly savings can exceed $250. EIA projects retail electricity rates will rise an average of 2.5% annually through 2030, so savings grow modestly each year. ### What is the solar panel cost per watt installed in 2026? The national average installed cost in 2026 is approximately **$2.70 to $3.20 per watt** for residential systems, based on NREL benchmarks and quote data from SEIA member installers. Smaller systems (under 5 kW) tend to cost more per watt; larger systems (9 kW+) often come in at the lower end of the range. Per-watt cost includes panels, inverter, racking, labor, and permits. ### Are solar panels worth it if I plan to move in 5 years? Possibly — research has found solar homes sell for 3–4% more on average than comparable non-solar homes, representing roughly **$9,000–$15,000 in added resale value** on a mid-sized system. If you sell before payback, that premium can recover a significant share of your net investment. The effect is strongest in markets like California, Arizona, and the Northeast where buyers are already familiar with solar ownership. ### Which is cheaper — a solar loan, solar lease, or cash purchase?
### How long until solar panels pay for themselves on a 1,700 sq ft home? At average US electricity rates and system costs, expect a **payback period of 8–12 years** after the federal ITC. In high-rate states (California, Massachusetts, Hawaii, New Jersey), payback shortens to 6–8 years. In low-rate states, it runs 12–16 years. After payback, panels typically generate free electricity for another 10–15 years before output drops below 80% of original rated capacity. Use our [solar payback calculator](/calculators/solar-payback/) to enter your exact utility rate, system size, and location and get your personalized break-even year within seconds. *Data sources: U.S. Energy Information Administration (EIA) — Average Retail Price of Electricity, Residential, 2025; National Renewable Energy Laboratory (NREL) — U.S. Solar Photovoltaic System and Energy Storage Cost Benchmarks, Q1 2025; Solar Energy Industries Association (SEIA) — Solar Market Insight Report Q4 2025; IRS — Form 5695, Residential Energy Credits; DSIRE — Database of State Incentives for Renewables & Efficiency, 2026.*
Same usage, bill-based guide
Your 1,700 sq ft Home target maps to roughly a $125/month electric bill nationally.