Home Solar Panels in 2026: The Complete Guide (After the Tax Credit Expired)

The federal homeowner solar tax credit — Section 25D — expired December 31, 2025. Every cost estimate on most solar websites still assumes a 30% federal credit that no longer applies to homeowners. This guide uses real 2026 numbers: what solar panels actually cost, what incentives still exist, and how to calculate whether going solar makes financial sense for your home.

Disclaimer: Cost estimates are based on Lawrence Berkeley National Laboratory's Tracking the Sun 2024 report and EIA Electric Power Monthly 2025 rate data. Solar production figures use NREL PVWatts v8 methodology. Actual quotes vary by installer, roof type, and local labor markets. Get at least three quotes before committing to a system.

Key Takeaways

• Solar costs $2.50–$3.40/watt installed nationally in 2026 (LBNL Tracking the Sun 2024) — a 9 kW system runs $22,500–$30,600 with no federal credit
• Section 25D expired December 31, 2025 — but state programs in NY, MA, AZ, OR, and others cut net cost by 10–40%
• EIA data shows the national average electricity rate rose to $0.168/kWh in 2025 — every rate increase improves solar ROI retroactively
• Microinverter systems cost 10–15% more upfront but eliminate the "one bad panel kills the string" problem common with string inverters
• Solar panels degrade just 0.5%/year on average (NREL) — a 9 kW system still produces 88% of original output after 25 years

How Solar Panels Actually Work

Solar panels convert sunlight directly into DC electricity through the photovoltaic effect — photons dislodge electrons in silicon cells, creating electrical current. A typical residential panel (400–440 watts) is about 20–23% efficient, meaning it converts that percentage of incoming sunlight into electricity. The rest is reflected or lost as heat.

Your inverter converts DC electricity from the panels into AC electricity that your home uses. Three main inverter architectures exist — more on that later. After the inverter, electricity flows to your main panel, where it powers your home first and any surplus flows to the utility grid (or to a battery if you have one).

According to NREL's PVWatts tool, residential systems typically operate at 80–86% efficiency accounting for real-world losses: shading, wiring resistance, temperature effects, inverter conversion losses, and soiling. These losses add up to roughly 14–20% below theoretical maximum output.

The peak sun hours concept is critical: one peak sun hour equals 1,000 W/m² of solar irradiance. Phoenix gets 6.5 peak sun hours per day; Seattle gets 3.5–4.0. A 9 kW system in Phoenix produces roughly 21,500 kWh/year; the same system in Seattle produces 11,500 kWh/year — 87% more production in the Southwest for the identical hardware investment.

What Solar Costs in 2026

The national average installed cost for residential solar is $2.75–$3.10/watt as of 2024, per LBNL's Tracking the Sun 2024 report. State-by-state variation is significant — ranging from ~$2.50/watt in Texas (high competition, low labor costs) to $3.40/watt in California (high wages, permitting complexity).

These figures represent the gross cost before any incentives. In states with significant programs — New York, Massachusetts, Oregon — net costs after incentives can be 25–40% lower. Use our Solar ROI Calculator to model your specific state, electricity rate, and system size.

What Solar Incentives Still Exist in 2026

The expiration of Section 25D removed the largest single incentive available to homeowners — a 30% federal income tax credit worth $6,750–$9,180 on a typical 9 kW system. What remains varies significantly by state.

State Tax Credits

Several states offer income tax credits that partially replace the federal credit's function:

• New York: 25% state income tax credit, capped at $5,000 (NY Tax Law §606(g-1)). On a $28,800 system, the math hits the cap — you receive $5,000 off your state tax bill.
• Arizona: 25% state income tax credit, capped at $1,000 (AZ Form 310). Modest but real.
• Oregon: Residential Energy Tax Credit has been restructured; confirm current terms at Oregon ODOE.
• Massachusetts: No income tax credit for solar, but the SMART program (below) delivers ongoing payments.

State Rebate and Production Programs

• Massachusetts SMART (Solar Massachusetts Renewable Target): A performance-based incentive that pays a fixed rate per kWh your system produces for 10 years. Rates vary by utility and block — currently $0.06–$0.18/kWh depending on where you fall in the program blocks.
• New York NY-Sun Megawatt Block: A per-watt upfront rebate (~$0.20–$0.40/watt depending on utility territory) applied directly to your invoice — not a tax credit you file for later.
• California SGIP: Not a solar rebate — it's a battery storage rebate. ~$200/kWh of battery capacity (more for income-qualified customers). Read more in our Battery Storage Guide.
• Colorado Xcel Smart Solar Rewards: ~$0.018/kWh of production for 15 years — worth ~$3,900 on a typical 8 kW system.

Universal Tax Exemptions

Most states offer at least one of these — and they apply whether or not there's a state income tax credit:

• Sales tax exemptions: 28+ states exempt solar equipment from state sales tax. Savings vary from 4% (Virginia) to 9.5% (Tennessee). On a $25,000 system, this ranges from $1,000 to $2,375.
• Property tax exemptions: 36+ states exempt the added home value from solar from property tax assessment. On a $25,000 system that adds $20,000 to home value, at a 1.2% effective tax rate, this saves $240/year indefinitely.

Net Metering Explained (NEM 3.0 and Beyond)

Net metering determines how much credit your utility pays for solar electricity you export to the grid. The difference between states is enormous — and it's one of the biggest variables in solar ROI calculations.

Full Retail Net Metering

Most states — including Florida, Washington, Colorado, and New York (for most utilities) — still credit solar exports at the full retail rate. If your electricity costs $0.14/kWh, you also receive $0.14/kWh credit for each kWh you export. This is the most favorable scenario.

California NEM 3.0

In April 2023, California switched from near-retail net metering to an "avoided cost" rate of approximately $0.05–$0.08/kWh for exports. Since California's retail rate averages $0.282/kWh, exporting solar there earns 78% less per kWh than using it directly. The implication: size California systems to roughly 80–90% of annual consumption — don't oversize for export.

Avoided-Cost Rates (Georgia, Nevada, Arizona APS)

Some utilities pay only their avoided cost — what they would have paid to generate or buy the power themselves — rather than retail rate. Georgia Power: ~$0.04/kWh. NV Energy: ~$0.07–$0.09/kWh. Arizona APS: ~$0.07–$0.09/kWh. In these states, battery storage dramatically improves solar economics by maximizing self-consumption.

How to Size a Solar System

System sizing starts with your electricity consumption — specifically, your annual kWh usage. You'll find this on 12 months of electric bills, or through your utility's online account portal.

The formula is straightforward:

System size (kW) = Annual kWh ÷ (Peak sun hours/day × 365 × 0.86)

The 0.86 accounts for real-world system losses (NREL standard). Example: a home using 12,000 kWh/year in Denver (5.5 peak sun hours/day):

12,000 ÷ (5.5 × 365 × 0.86) = 6.95 kW → round to a 7 kW system

Important nuances:

• If you're adding an EV: Add 3,000–4,500 kWh/year to your baseline (11,500–17,000 miles ÷ 3.5 miles/kWh). Size the system for your post-EV load.
• If you're adding a heat pump: Add 2,000–4,500 kWh/year depending on climate and home size.
• Net metering quality: In states with poor export rates, target 80–90% of consumption — don't oversize. In states with full retail net metering, 100–110% of consumption is reasonable.
• Roof constraints: Your available unshaded roof area limits maximum system size. A typical 400W panel requires ~20 sq ft, so a 9 kW system (22–23 panels) needs ~460 sq ft of unshaded south/southwest-facing roof.

Our Solar ROI Calculator runs this math automatically for your ZIP code and electricity usage.

Microinverters vs. String Inverters vs. Power Optimizers

The inverter architecture you choose affects system cost, performance monitoring, shade tolerance, and maintenance.

String Inverters

One central inverter converts DC from all panels wired in "strings." It's the cheapest option — a 9 kW string system saves $800–$1,500 over a microinverter system. The downside: if one panel underperforms (shading, debris, failure), the entire string's output can drop. Best for: unshaded roofs with simple layouts.

Brands: SMA, Fronius, SolarEdge (with optimizers)

Microinverters

Each panel gets its own small inverter. Shade on one panel doesn't affect others. Panel-level monitoring shows exactly which panel is underperforming and why. The premium: $0.20–$0.40/watt more than string inverters — roughly $1,800–$3,600 extra on a 9 kW system.

Best for: Roofs with any shading, complex multi-directional layouts, or homeowners who want panel-level monitoring.

Brands: Enphase (dominant), APsystems

Power Optimizers + String Inverter

A hybrid: each panel gets a DC optimizer that maximizes its output, then feeds a central string inverter. Panel-level monitoring without full microinverter cost. The SolarEdge system is the most common implementation — premium is $0.10–$0.20/watt above a basic string setup.

How to Choose a Solar Installer

The installer you choose affects system design quality, permitting speed, workmanship, and post-installation support. Poor installation is the most common cause of underperforming systems — not bad panels or inverters.

What to Look For

• NABCEP certification: The North American Board of Certified Energy Practitioners (NABCEP) is the gold standard for solar installer credentialing. Look for NABCEP-certified installers or companies with NABCEP-certified PV Installers on staff.
• Licensed electrical contractor: Your installer must be a licensed electrical contractor in your state (or work with one). Never let an unlicensed person pull electrical permits.
• Local presence: Companies with local offices are more likely to respond to warranty claims. Out-of-state "big box" installers have a poor track record for post-installation support.
• 3+ competitive quotes: According to EnergySage's Solar Marketplace data, homeowners who get 3+ quotes save 15–20% compared to those who sign with the first company they talk to.

Red Flags

• High-pressure sales tactics or "today only" pricing
• Installer won't provide a physical installation contract
• Company can't show you examples of completed local installs with utility Permission to Operate (PTO) letters
• No workmanship warranty (separate from manufacturer panel warranty)

Financing the Conversation

Know your preferred payment method before talking to installers: cash, solar loan, lease, or PPA. Installers earn higher commissions on leases and PPAs — going in with a cash or loan preference keeps the conversation focused on system quality and total cost, not monthly payment math that obscures 25-year economics. Our Lease vs. Buy vs. PPA Calculator shows the 25-year cost difference.

Solar + Battery: Why They Work Together

Battery storage and solar panels are increasingly designed as integrated systems. The economic case for adding a battery depends heavily on your state's net metering policy.

Where batteries make the most financial sense:

• California (NEM 3.0): exports earn $0.05–$0.08/kWh; using stored solar avoids paying $0.282/kWh — a $0.20/kWh swing
• States with avoided-cost export rates: Nevada ($0.07–$0.09/kWh), Georgia (~$0.04/kWh), Arizona APS ($0.07–$0.09/kWh)
• Homes in areas with frequent power outages who value backup power

Where batteries are harder to justify financially:

• States with full retail net metering: exporting earns as much as consuming, so storage adds cost without adding savings

The Tesla Powerwall 3 (13.5 kWh, $9,700–$12,500 installed) and Enphase IQ Battery 5P (5 kWh per unit, typically 2–3 units stacked) are the two most commonly installed products in 2026. Read our full Battery Storage Guide for specs, costs, and incentives.

Solar + EV: The Synergy Play

Adding an EV to a solar home is one of the highest-ROI combinations in home electrification. The math: a typical EV adds 3,375–4,500 kWh of charging demand per year (based on 13,500 miles at 3–4 miles/kWh). At $0.15/kWh electricity rate, that's $506–$675 in annual electricity cost — versus roughly $1,350–$1,750 in annual gasoline cost for a 30 MPG car at $3.50/gallon.

Solar covering EV charging saves on both fronts: you avoid buying grid electricity at $0.15/kWh, AND you displace gasoline. The combined annual benefit can be $1,500–$2,500 per year just from the EV charging portion of the solar system.

Timing matters: install the EV charger before June 30, 2026 to capture the Section 30C credit (30% up to $1,000). Our EV Charger Cost Calculator estimates your hardware and installation costs.

Your Solar Action Roadmap

1. 1

   Pull 12 months of electricity bills and note your annual kWh usage.

   Log into your utility account or pull paper bills. You need annual kWh (not just dollar amount) because solar production offsets kWh, not dollars. If you’re adding an EV or heat pump, add their expected consumption to your baseline before sizing.

2. 2

   Look up your state’s current incentives at DSIRE.

   The Database of State Incentives for Renewables & Efficiency (https://www.dsireusa.org/) is the authoritative source for state-level programs. Verify what’s currently active before assuming any specific credit or rebate applies to your situation.

3. 3

   Confirm your utility’s net metering policy before sizing your system.

   Call your utility or check their website for the current export rate. If they pay below retail rate, target 80–90% of annual consumption rather than 100%. This decision affects system size — and therefore total cost.

4. 4

   Get 3+ quotes through an independent marketplace.

   EnergySage and SolarReviews let you receive multiple installer quotes without cold calls. EnergySage data shows users save 15–20% versus calling installers directly. Compare quotes on price per watt, not monthly payment — the latter obscures total cost.

5. 5

   Decide cash vs. loan vs. lease before the sales conversation.

   Cash or solar loan gives you full ownership — you keep all savings and incentives. Leases and PPAs transfer ownership (and incentives) to the financing company. Know your preference in advance so installers can’t steer you toward higher-margin options.

6. 6

   Consider adding battery storage or an EV charger to the same installation.

   Installing solar and battery storage together typically saves $500–$1,500 in permit fees and electrician labor versus separate installations. If you own an EV or plan to buy one, adding the charger circuit simultaneously is the lowest-cost option.

Bottom Line

Home solar in 2026 requires doing the math honestly — without the 30% federal credit, many systems that looked like 6–7 year paybacks now look like 8–12 year paybacks. That's still within the 25-year panel lifespan in most cases, but it raises the bar on system design quality, installer selection, and net metering terms.

The states where solar still makes the strongest financial case: New York (state credit + NY-Sun rebate + high electricity rates), Massachusetts (SMART program + high rates), California (high rates despite NEM 3.0), and the Southwest (exceptional sun resource). The weakest cases: Pacific Northwest (low sun + cheap hydro power) and states with avoided-cost net metering and modest electricity rates.

Cross-link to the rest of our home electrification series: Home Battery Storage Guide 2026 · Home EV Charging Guide 2026 · Heat Pump Guide 2026 · Complete Home Electrification Guide 2026

Sources

• Lawrence Berkeley National Laboratory — Tracking the Sun 2024
• U.S. EIA — Electric Power Monthly, 2025
• NREL — PVWatts Calculator v8
• DSIRE — Database of State Incentives for Renewables & Efficiency
• IRS — Section 25D Residential Clean Energy Credit (expired Dec 31, 2025)
• IRS — Section 30C Alternative Fuel Vehicle Refueling Property Credit
• EnergySage — Solar Marketplace Intelligence Report
• NABCEP — North American Board of Certified Energy Practitioners