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Solar Learning Center

Clear, unbiased guides to help you decide if solar makes sense for your home in 2026. No installer partnerships. No sponsored content. Just facts.

$2.80/W
Average installed cost (2026)
Down from $3.10/W in 2022
7–9 yrs
Average US payback period
Without federal credit
25 yrs
Typical panel lifespan
Most panels degrade <0.5%/yr
40+ states
Have net metering laws
Earns bill credits for excess power

How Home Solar Works

A home solar system has three main parts: panels, an inverter, and a utility meter. Panels capture sunlight and produce direct current (DC) electricity. The inverter converts DC to alternating current (AC), which powers your home. Any electricity your panels produce that you don't use immediately flows back to the grid.

Your utility meter tracks both directions — electricity you consume and electricity you export. In states with net metering, you earn bill credits for exported power at the retail rate. A typical 8 kW system produces 10,000–14,000 kWh per year, enough to cover most US households.

Most residential systems use monocrystalline silicon panels rated at 400–500 W each. An 8 kW system requires roughly 16–20 panels and about 400–500 sq ft of roof space. Installation takes 1–3 days. The permit and utility approval process takes 2–8 weeks depending on your state.

The 6-Step Process to Go Solar

1
Get 3 quotes
Contact at least 3 NABCEP-certified installers. Quotes are free. Prices vary 20–30% between contractors for identical systems.
2
Review your utility bill
Find your annual kWh usage. Your installer uses this to size the system correctly. Aim to cover 80–100% of your usage.
3
Check your roof
South-facing roofs at 30–45° tilt are ideal. East and west-facing roofs still work. Shade from trees or chimneys reduces output.
4
Review the contract carefully
Ask about equipment brands, inverter type, production guarantees, and what happens if panels underperform. Get everything in writing.
5
Permits and installation
Your installer pulls permits and handles utility interconnection. Installation takes 1–3 days. Utility inspection takes 2–8 weeks.
6
Claim state incentives
The federal ITC expired December 31, 2025. File for any state tax credit with your state return. Property tax exemptions apply automatically in most states.

What Does a Solar System Cost in 2026?

The national average installed cost is $2.75–$3.10 per watt in 2026. A typical 8 kW system runs $22,000–$25,000 before any incentives. Labor accounts for roughly 10–15% of the total; equipment (panels, inverter, racking) makes up the rest.

The 30% federal solar tax credit (Section 25D expired December 31, 2025) is no longer available for residential cash or loan purchases. State tax credits, property tax exemptions, and utility rebates still apply in many states — check your state page for exact numbers.

Prices vary by region, installer, and equipment brand. Getting 3 quotes typically saves homeowners $1,500–$4,000 compared to the first quote they receive. Always compare quotes on a per-watt basis, not total price, to account for different system sizes.

Solar panels (16–20 panels)
$8,000–$12,000
~50% of total
Inverter (string or microinverters)
$2,000–$5,000
~15% of total
Racking / mounting hardware
$1,500–$3,000
~10% of total
Labor and installation
$2,500–$4,000
~15% of total
Permits, inspection, utility fees
$500–$1,500
~5% of total
Electrical upgrades (if needed)
$500–$2,000
~5% of total

In-Depth Guides

Each guide covers one topic thoroughly — no filler, no sales pitch.

How Much Do Solar Panels Cost in 2026?

5 min read

National averages, price-per-watt, what affects cost, and how to get the best quote. The 2026 US average is $2.80/W installed.

How Net Metering Works

4 min read

Turn your roof into a mini power plant. How bill credits work and which states have the best net metering policies in 2026.

Solar Tax Credits in 2026: What Expired and What Remains

5 min read

The 30% federal ITC (Section 25D) expired December 31, 2025. Here's what still applies — state credits, property tax exemptions, and utility rebates.

Solar + Battery Storage

6 min read

Do you need a battery? What to know about Powerwall, Enphase, and backup during outages. Costs, payback, and when it makes sense.

How to Choose a Solar Installer

7 min read

Red flags to avoid, questions to ask, and why getting 3 quotes always pays off. What NABCEP certification means and why it matters.

Solar Panel Lifespan & Warranties

4 min read

How long panels last, what's covered by warranty, and how degradation affects your 25-year savings estimate.

Monocrystalline vs. Polycrystalline vs. Thin-Film

Most homeowners in 2026 choose monocrystalline panels. They have the highest efficiency (20–23%), the longest lifespan, and are now competitively priced. Polycrystalline panels cost slightly less but are less efficient and less common for new installations. Thin-film panels are rarely used for rooftop residential systems.

Monocrystalline
Efficiency
20–23%
Lifespan
25–30 yrs
Relative cost
$$$

Best for most homes. High efficiency = fewer panels needed. Standard choice in 2026.

Polycrystalline
Efficiency
15–17%
Lifespan
20–25 yrs
Relative cost
$$

Lower cost, but requires more roof space for the same output. Less common in new installations.

Thin-Film (CIGS/CdTe)
Efficiency
10–13%
Lifespan
15–20 yrs
Relative cost
$

Best for large commercial rooftops. Rarely used for residential due to low efficiency.

Solar Basics: Common Questions

Straight answers — no sales pitch, no installer bias.

How do solar panels work?
Solar panels contain photovoltaic (PV) cells made of silicon. When sunlight hits them, electrons are knocked loose, creating direct current (DC) electricity. An inverter converts DC to AC — the type your home uses. Excess electricity either charges a battery, powers other devices, or goes to the grid for bill credits (net metering).
How big a solar system do I need?
Divide your annual electricity usage (kWh) by your location's annual solar yield (kWh/kWp). Example: 10,000 kWh ÷ 1,500 kWh/kWp = 6.7 kW system. Our free calculator does this automatically — or find your city for location-specific yield data from PVGIS satellite measurements.
Do solar panels work in winter or on cloudy days?
Yes. Solar panels generate electricity from daylight, not heat. Cold, clear winter days actually produce good output. Overcast days produce 10–25% of peak output. Germany — which has far less sun than most of the US — generates over 20% of its electricity from solar. Our yield data already accounts for average cloud cover in each city.
Did the federal solar tax credit expire?
Yes. The 30% residential solar Investment Tax Credit (Section 25D) expired on December 31, 2025, under the One Big Beautiful Bill. Cash and loan purchases can no longer claim this federal credit. The commercial solar credit (Section 48) for businesses remains. State credits, utility rebates, and net metering still apply in many states.
Will solar panels void my roof warranty?
Not if installed by a qualified contractor. Reputable installers use flashing and mounting systems designed to preserve the roof membrane. Many roofing manufacturers certify their products for solar installation. Ask your installer for documentation and review your current roof warranty terms before signing.
Should I wait for solar to get cheaper?
Panel prices have fallen 90% since 2010 and are now stable. Significant further price drops are unlikely. Every year you wait is a year of electricity bill savings lost. The federal ITC expired in 2025 — waiting cost buyers that 30% credit. State incentives can also change. Most solar analysts say the best time to install is now.
Can I install solar panels myself?
DIY solar is possible for off-grid systems but not recommended for grid-tied residential. Grid-tied systems require permits, utility approval, and licensed electrical work in most states. Mistakes can void warranties, fail inspections, or create fire hazards. Some rural homeowners successfully DIY off-grid setups, but most homeowners should use a licensed installer.
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Real yield data and incentives for all 50 states.

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