US residential solar · 2026 data

Solar Panels for 1,900 sq ft House

SAVE

$0+

Over 25 Years

$16,000 Cost after ITC

11.0 yrs Payback

7.6 kW System size

Most homeowners need:

17–22 panels
7.6 kW system
$16,000 after tax credits
11.0 year payback

✓ Updated monthly ✓ NREL data ✓ Reviewed by solar experts ✓ IRS tax credit included

Updated June 9, 2026 · 9 min read ·By Mark Sullivan ·Reviewed by Green Energy Calculators Editorial Team

Calculate My System Size View State Data

Without solar vs with solar

25-year cost comparison for a $300/month US electric bill.

Without solar

25-year utility cost

$60,800

Rates rise ~3% per year (EIA avg.)

With solar

Net system cost

$16,000

After 30% federal ITC

Your savings

Difference

+$44,900

Estimated lifetime advantage

Author Mark Sullivan

Reviewed by Green Energy Calculators Editorial Team

Last updated Jun 9, 2026

Sizing formula kW = Annual kWh ÷ (Peak Sun Hours × 365 × 0.82)

Most 1,900 sq ft homes need 10 to 16 solar panels to cover 100% of their electricity use — but that range can shift by 30% or more depending on where you live, how your home is insulated, and the wattage of the panels you choose. The national average electricity bill for a home this size runs about $140–$170 per month, which translates to roughly 10,500–12,000 kWh per year. Getting the sizing right from the start prevents the two most expensive mistakes homeowners make: buying a system that’s too small to meaningfully cut the bill, or oversizing and paying for capacity that net metering won’t fully credit.

Three variables drive almost everything: your actual annual kWh consumption (not square footage), the peak sun hours at your address, and the wattage rating of the panels you install. We’ll walk through each one with real numbers so you can size confidently before collecting a single quote.

How to Calculate Solar Panel Count for a 1,900 sq ft Home

The sizing math is straightforward once you have your electricity data. Pull your last 12 months of utility bills and add up the total kWh. For a 1,900 sq ft home, the EIA’s Residential Energy Consumption Survey puts the U.S. average at about 10,500 kWh/year, though homes in the South often run 13,000–15,000 kWh due to heavy air conditioning loads.

Step 1 — Find your daily kWh need: Annual kWh ÷ 365 = daily kWh. For 10,500 kWh, that’s ~28.8 kWh/day.

Step 2 — Divide by your location’s peak sun hours: Peak sun hours vary from 3.5 (Pacific Northwest, New England) to 6.5 (Arizona, New Mexico). A home in Phoenix using 28.8 kWh/day needs a 4.4 kW system; the same home in Seattle needs an 8.2 kW system. NREL’s PVWatts tool gives precise peak sun hours by ZIP code at no cost.

Step 3 — Divide system size by panel wattage: Standard residential panels in 2026 are 380W–420W. A 7 kW system using 400W panels = 17.5, rounded to 18 panels.

A common question is whether square footage alone is enough to size a system. It isn’t — a 1,900 sq ft home with gas heat uses roughly 7,000 kWh/year while the same footprint with electric heat can hit 15,000 kWh. Always start with your actual utility data.

Solar Panel Count by Usage and Location (2026)

Annual kWh Use	Peak Sun Hours	System Size Needed	Panels (400W)
9,000 kWh	5.5 (Southwest)	4.5 kW	11–12
10,500 kWh	5.0 (Southeast/Midwest)	5.8 kW	14–15
10,500 kWh	4.0 (Northeast/NW)	7.3 kW	18–19
13,000 kWh	5.5 (High-AC South)	6.5 kW	16–17
13,000 kWh	3.5 (Low-sun states)	10.3 kW	25–26

Use our solar system size calculator to plug in your exact usage and ZIP code — it pulls live peak sun hour data and outputs a panel count in seconds.

Bar chart showing solar system size needed by region for a 10500 kWh per year home — **Solar System Size Varies Significantly by Region** A 10,500 kWh/yr home needs 5.2 kW in the Southwest but 8.2 kW in the Pacific Northwest due to peak sun hour differences. Source: NREL PVWatts 2026.

Find your exact solar savings

Enter your ZIP code for a personalized estimate using your state's electricity rate and sun hours.

What Does a Solar System for a 1,900 sq ft Home Cost in 2026?

The installed cost for a properly sized solar system on a 1,900 sq ft home falls between $18,000 and $32,000 before incentives in 2026, based on SEIA’s Q1 2026 residential pricing data. The most common system size for this home footprint — around 7–8 kW — prices out at $21,000–$28,000 at the national average of $3.00–$3.50 per watt installed.

After applying the federal solar Investment Tax Credit (ITC), which sits at 30% through 2032 per IRS Form 5695, that range drops to $14,700–$22,400. Many states layer additional incentives on top: Massachusetts offers a 15% state tax credit (up to $1,000), New York provides the NY-Sun incentive at $0.20–$0.40/W, and states like California and Texas have utility rebate programs that can cut another $500–$2,000 off the pre-tax figure.

Panel brand and inverter type also move the total. String inverters are cheapest at $0.20–$0.30/W; microinverters (Enphase) or power optimizers (SolarEdge) add $0.30–$0.50/W but improve output on shaded roofs by 5–25%. Homeowners often ask whether the microinverter premium is worth it — the answer is generally yes if more than 20% of your roof area sees shade during peak hours, because shading even one panel in a string-inverter setup can reduce output across the entire array.

The 30% ITC alone saves the average homeowner on a 7.5 kW system about $7,200 — but you must own the system outright (not lease it) and have sufficient federal tax liability to claim the full credit in year one. Unused credit carries forward to subsequent tax years. Use our solar tax credit calculator to confirm your exact federal savings before signing any installation contract.

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).

Total utility payments

$60,800

Total solar cost (after ITC)

$16,000

Net savings

+$44,900

Avg. monthly difference

+$120/mo

See my savings →

How Long Does Solar Payback Take on a 1,900 sq ft Home?

Payback period — the point where cumulative savings offset your upfront cost — runs 6 to 12 years for most 1,900 sq ft homes in 2026. The wide range reflects electricity rate differences more than anything else: a homeowner in Hawaii paying $0.37/kWh hits payback in 5–6 years on an identical system that takes 11–12 years to break even for a homeowner in Louisiana paying $0.11/kWh.

Here’s how the math works for a 7.5 kW system (net cost after ITC: ~$17,500) in three representative states:

Arizona: 5.5 peak sun hours × 7.5 kW × 365 days × 80% efficiency = ~12,045 kWh/yr generated. At $0.13/kWh average rate → ~$1,566/yr savings → 11.2-year payback
Massachusetts: 4.2 peak hours → ~9,197 kWh/yr. At $0.24/kWh → ~$2,207/yr → 7.9-year payback
California: 5.2 peak hours → ~11,357 kWh/yr. At $0.28/kWh + NEM 3.0 → ~$2,800–$3,200/yr → 5.5–6.2-year payback

Net metering policy matters enormously. States with full retail-rate net metering — compensating you dollar-for-dollar for every kWh you export — cut payback by 2–3 years compared to states with reduced export rates. DSIRE.org tracks current net metering rules by state, and the differences are significant: California’s NEM 3.0 reduced export credits by roughly 75% for new systems, which is why pairing solar with a battery now makes stronger financial sense in that market.

After payback, the system generates essentially free electricity for its remaining life. Most tier-1 panels carry a 25-year production warranty and degrade at roughly 0.5% per year, meaning your panels still produce about 87% of original output at year 25. For more on this topic, see our guide to How Many Solar Panels for a 1,800 sq ft House?. For more on this topic, see our guide to How Many Solar Panels for a 1,100 sq ft House?.

Line chart comparing 25-year cumulative solar savings for Massachusetts versus Louisiana homeowners — **Electricity Rates Drive Payback More Than Sunshine** A 7.5 kW system in Massachusetts breaks even around year 8 and generates $37,675 in lifetime savings versus $7,900 in Louisiana. Source: EIA state electricity prices, NREL 2026.

Is Solar Worth It for a 1,900 sq ft Home by State?

Solar delivers its strongest returns in states combining high electricity rates, strong net metering, and generous state incentives — not necessarily the sunniest states. According to SEIA’s 2025 Solar Market Insight report, the top five states for residential solar ROI in 2026 are Massachusetts, California, New Jersey, New York, and Hawaii. All five have electricity rates above $0.22/kWh and favorable export compensation policies.

That said, solar is increasingly viable across much more of the country. Florida, Arizona, and Colorado all offer payback periods under 9 years for a properly sized system. Even Ohio and Illinois homeowners are seeing 9–11 year paybacks as electricity rates have risen 18–22% since 2022 per EIA data. A common question is whether solar is worth it without strong net metering — and the honest answer is that battery storage increasingly fills that gap, letting you self-consume more of what you generate rather than exporting at reduced rates.

Solar is generally worth pursuing if your electricity rate is above $0.12/kWh, your roof has at least 15 years of life remaining, you have south-, east-, or west-facing sections with minimal shade, you plan to stay in the home for at least 7 years, and you have federal tax liability to use the 30% ITC. Solar becomes a harder financial case in states with poor net metering, on north-facing roofs, or where utility rates sit below $0.10/kWh.

One factor more homeowners are weighing in 2026: adding a home battery alongside the solar array. A Tesla Powerwall 3 (13.5 kWh) adds $10,000–$13,000 to system cost but also qualifies for the 30% ITC and enables time-of-use arbitrage by storing cheap off-peak solar and avoiding peak-rate grid draw. Over a 25-year system life, that combination typically adds $8,000–$15,000 in additional value over solar alone in high-rate markets.

How to Compare Solar Quotes for a 1,900 sq ft Home

The single biggest mistake homeowners make is comparing quotes that aren’t sized the same way. An $18,000 quote for a 6 kW system and a $24,000 quote for an 8 kW system aren’t directly comparable — the larger system may deliver a better cost-per-watt and a shorter payback period. When collecting quotes (aim for 3–5 installers), standardize your comparison on cost per watt installed, which is the true apples-to-apples metric. The national average is $3.00–$3.50/W in 2026; bids below $2.75/W deserve scrutiny on equipment quality.

Verify each quote’s panel tier and wattage. Tier 1 manufacturers — Qcells, REC, Panasonic, Jinko — carry stronger degradation warranties, typically guaranteeing 90% output at year 10 and 80% at year 25. Ask for the full panel datasheet, not just the brand name. Also confirm the inverter type: string inverters cost less but microinverters or power optimizers improve production on partially shaded roofs and provide panel-level monitoring, which helps diagnose performance issues early.

Reputable installers guarantee first-year output within 5% of the modeled figure — get this in writing before signing. Standard warranty coverage runs 25 years on panel production and 10 years on workmanship. Be wary of any installer who sizes the system based on square footage without reviewing 12 months of actual utility bills. A south-facing 1,900 sq ft home produces 15–20% more than an identically sized home with a predominantly north-facing roof, so orientation and shading data belong in every legitimate quote.

Use our solar payback calculator to independently model any quote you receive — enter the system size, cost, and your current electricity rate to verify the installer’s payback estimates before you sign.

Frequently asked questions

Direct answers for US homeowners — sized for a $150/month electric bill.

### How many solar panels does a 1,900 sq ft house need?

Most 1,900 sq ft homes need 10–16 solar panels rated at 400W each. The exact count depends on your annual electricity use (typically 9,000–13,000 kWh/year for this size home), your location's peak sun hours (3.5–6.5 depending on state), and the panel wattage. Homes in sunnier southern states need fewer panels; homes in the Pacific Northwest or New England typically need 18–22 panels to reach 100% offset. ### How much do solar panels save per month on a 1,900 sq ft home in 2026? Monthly savings depend on system size and local electricity rates. A 7.5 kW system generating 900–1,000 kWh per month saves roughly $108–$370/month depending on whether your rate is $0.12 or $0.37/kWh. Most homeowners in mid-rate states ($0.14–$0.18/kWh) see monthly bill reductions of $120–$175, which translates to $1,440–$2,100 per year once the system is fully operational. ### Which is cheaper for solar on a 1,900 sq ft home — a loan or a lease? A solar loan typically delivers 40–60% more lifetime value than a lease. With a loan you own the system and claim the 30% ITC (worth ~$7,200 on a typical 7.5 kW system), which a lease does not offer. Loans run $150–$220/month on a 10-year term at 5–7% APR. Leases offer $0-down access and fixed payments, but the installer keeps the tax credit and system ownership, and you forgo equity benefits at resale. ### How long until solar panels pay for themselves on a 1,900 sq ft home? After the 30% federal ITC, payback runs 6–12 years for most 1,900 sq ft homes. Homeowners in high-rate states like California, Hawaii, and Massachusetts often break even in 5–8 years. Those in low-rate states like Louisiana or Oklahoma typically wait 11–14 years. After payback, the remaining panel life generates essentially free electricity worth $15,000–$40,000 over the system's 25-year life. ### Does solar work well if my roof doesn't face south? Yes, though output drops. East- and west-facing roofs produce 15–20% less than a true south-facing array, which still makes economic sense in most U.S. markets above $0.14/kWh. North-facing roofs are the real limitation — they typically generate 30–40% less and push payback periods past 14 years in most states. Microinverters or power optimizers recover some of that loss by optimizing each panel independently rather than pulling an entire string down when one panel underperforms. *Data sources: U.S. Energy Information Administration (EIA) Residential Energy Consumption Survey and state electricity price data 2025–2026; NREL PVWatts Calculator peak sun hour data by ZIP code; Solar Energy Industries Association (SEIA) Q1 2026 Solar Market Insight Report; IRS Form 5695 (Residential Clean Energy Credit, 30% ITC through 2032); DSIRE.org state net metering and incentive database.*

Same usage, bill-based guide

Your 1,900 sq ft House target maps to roughly a $150/month electric bill nationally.

$150 $150/month electric bill guide Panels · cost · payback · by state →

Popular state solar guides

Electricity rates and incentives vary — see data for your state.

CA California 29.4¢/kWh · 5.8h sun TX Texas 13.8¢/kWh · 5.6h sun FL Florida 13.5¢/kWh · 5.7h sun AZ Arizona 13.2¢/kWh · 6.5h sun NC North Carolina 12.8¢/kWh · 5.2h sun NY New York 22.4¢/kWh · 4.3h sun MA Massachusetts 24.5¢/kWh · 4.2h sun CO Colorado 14.2¢/kWh · 5.5h sun

View all 50 states →

Popular utility companies

Solar rules and net metering vary by utility — not just by state.

PG&E California Duke Energy NC · FL · Midwest Florida Power & Light Florida Oncor Texas APS Arizona Georgia Power Georgia

Methodology & data sources

Calculation method: System size uses NREL PVWatts derate factor (0.82). Costs based on SEIA 2026 installed cost ($2.75–$3.20/W). Payback uses net cost after 30% federal ITC (IRC Section 25D). Savings assume full-retail net metering unless noted.

Official sources: EIA state electricity rates · NREL PVWatts · Energy.gov ITC guide · DSIRE incentives · SEIA market data · IRS Publication 5695.

All figures are estimates for educational purposes — not tax, legal, or investment advice. Consult a licensed installer and CPA for your situation.