Which state has the cheapest solar installation?

Arizona and Texas consistently have the lowest installed costs at approximately $2.50/W. This is driven by high installer competition, simple permitting processes, large market volume, and low labor costs. A 5 kW system in these states costs about $12,500 before incentives.

Which state has the most expensive solar installation?

Washington DC ($3.20/W), Hawaii ($3.10/W), and Connecticut ($3.10/W) have the highest per-watt costs due to complex permitting, high labor rates, limited installer competition, and in Hawaii's case, shipping costs for equipment. However, high electricity rates in these areas often mean faster payback despite higher installation costs.

Which state has the best solar payback period?

Hawaii has the fastest payback at roughly 4–5 years despite high installation costs, because electricity rates are $0.35/kWh — more than double the national average. Massachusetts and California also achieve fast payback (5–7 years) due to high electricity rates combined with strong state incentives.

Which states have the best solar incentives beyond the federal credit?

The strongest state incentive programs include: New York (NY-Sun rebates up to $0.20/W), Massachusetts (SMART performance payments), New Jersey (TRECs worth $0.04–$0.06/kWh), Illinois (SRECs at $60–$80 each), Connecticut (RSIP performance incentive), and Maryland (state tax credit up to $1,000). California's NEM 3.0 still provides value but at reduced export rates. These state programs and net metering remain in 2026; the federal §25D credit they used to stack on expired Dec 31, 2025 for owned systems.

Why does solar cost more in some states than others?

Solar costs vary by state due to five main factors: labor rates (highest in Northeast and West Coast), permitting complexity (simple in AZ/TX, burdensome in NY/MA), market competition (more installers means lower margins), sales tax treatment (some states exempt solar from sales tax), and logistics (shipping costs to remote states like Hawaii and Alaska).

Is solar worth it in states with cheap electricity?

In states with low electricity rates (under $0.12/kWh), the payback period extends to 15–20+ years, which makes the financial case weaker. States like Louisiana ($0.10/kWh), Arkansas ($0.11/kWh), and Idaho ($0.10/kWh) have the longest payback periods. Solar can still make sense for energy independence, hedge against future rate increases, and environmental reasons, but the pure financial return is slower.

Cost Of Solar Panels By State: Average Prices Per Watt (2026)

Solar installation costs range from $2.50/W in Arizona and Texas to $3.20/W in DC and Hawaii. The federal residential credit (IRC §25D) expired Dec 31, 2025 — a system you own and install in 2026 gets $0 federal, so a typical 5 kW residential system costs its gross $12,500–$16,000 depending on your state. A lease/PPA can still use the commercial §48E credit, which the provider claims and may pass through as a lower rate. But installed cost alone does not determine value — your electricity rate and sun exposure matter just as much. Hawaii's high installation cost ($3.10/W) delivers the fastest payback in the country (4–5 years) because electricity costs $0.35/kWh. Meanwhile, cheap-to-install Texas ($2.50/W) has slower payback (10–11 years) because electricity is only $0.13/kWh. This guide covers every state.

State

System size

Installed cost per watt runs from about $2.50/W in Arizona to $3.20/W in DC — a 28% spread driven by labor, permitting, and competition. The U.S. average is about $2.85/W. These are gross installed prices — an owned 2026 system gets $0 federal (§25D expired 2025-12-31).

Why Solar Costs Vary by State

Five factors drive the state-by-state price differences:

Labor rates. Installation labor is the single largest variable cost component, representing 15–25% of the total system price. States with higher prevailing wages (New York, California, Massachusetts, Connecticut) pass those costs through. In Texas and Arizona, lower labor costs translate directly to lower $/W pricing.

Permitting complexity. Some states and municipalities have streamlined solar permitting to a simple online application processed in days. Others require structural engineering reviews, multiple inspections, utility interconnection studies, and weeks of processing time. Every hour of administrative work adds to the installer's cost — and your price.

Market competition. States with mature solar markets (California, Texas, Arizona, Florida) have dozens of competing installers. Competition compresses margins and drives prices toward the floor. In states with fewer installers, less competition means higher margins.

Sales tax treatment. Some states fully exempt solar equipment from sales tax (Arizona, New Jersey, New York, Massachusetts, and others). In states that charge sales tax on solar, it adds 4–8% to the equipment cost.

Logistics and geography. Hawaii faces shipping surcharges on all equipment. Alaska has extreme logistics costs and a short installation season. Even within the continental US, rural areas in any state tend to cost more due to longer installer travel times.

All 50 States: Solar Cost, Rate, and Payback

Solar production varies dramatically by location. The NREL irradiance map below shows why — the Southwest receives nearly twice the annual sunlight as the Pacific Northwest. This directly affects payback periods.

NREL solar irradiance map of the United States showing annual peak sun hours by region

The table below shows installed cost per watt, the gross cost of a 5 kW system (the federal §25D residential credit expired Dec 31, 2025, so an owned 2026 system gets $0 federal and its net cost equals the gross), the average residential electricity rate, and an estimated payback period. Payback estimates use each state's average peak sun hours with a 0.83 PVWatts derate factor, computed on the full gross owned cost with $0 federal credit (2026). Paybacks are shown only for states with a firm sun-and-rate anchor; a dash means the estimate is not re-derived here.

State	$/W	5 kW Gross Cost	5 kW Owned Net (2026)	Elec. Rate ($/kWh)	Est. Payback (years)
Alabama	$2.70	$13,500	$13,500	$0.14	—
Alaska	$3.00	$15,000	$15,000	$0.23	—
Arizona	$2.50	$12,500	$12,500	$0.14	~10
Arkansas	$2.70	$13,500	$13,500	$0.11	—
California	$3.00	$15,000	$15,000	$0.25	~5
Colorado	$2.80	$14,000	$14,000	$0.15	—
Connecticut	$3.10	$15,500	$15,500	$0.26	—
Delaware	$2.80	$14,000	$14,000	$0.14	—
DC	$3.20	$16,000	$16,000	$0.14	—
Florida	$2.60	$13,000	$13,000	$0.14	~12
Georgia	$2.70	$13,500	$13,500	$0.13	—
Hawaii	$3.10	$15,500	$15,500	$0.35	~4
Idaho	$2.80	$14,000	$14,000	$0.10	—
Illinois	$2.90	$14,500	$14,500	$0.16	—
Indiana	$2.80	$14,000	$14,000	$0.14	—
Iowa	$2.80	$14,000	$14,000	$0.14	—
Kansas	$2.70	$13,500	$13,500	$0.14	—
Kentucky	$2.70	$13,500	$13,500	$0.12	—
Louisiana	$2.70	$13,500	$13,500	$0.10	—
Maine	$2.90	$14,500	$14,500	$0.22	—
Maryland	$2.90	$14,500	$14,500	$0.16	—
Massachusetts	$3.10	$15,500	$15,500	$0.28	~7
Michigan	$2.80	$14,000	$14,000	$0.18	—
Minnesota	$2.80	$14,000	$14,000	$0.14	—
Mississippi	$2.70	$13,500	$13,500	$0.12	—
Missouri	$2.70	$13,500	$13,500	$0.13	—
Montana	$2.80	$14,000	$14,000	$0.12	—
Nebraska	$2.80	$14,000	$14,000	$0.12	—
Nevada	$2.60	$13,000	$13,000	$0.13	—
New Hampshire	$3.00	$15,000	$15,000	$0.23	—
New Jersey	$2.90	$14,500	$14,500	$0.18	—
New Mexico	$2.60	$13,000	$13,000	$0.14	—
New York	$3.10	$15,500	$15,500	$0.24	~10
North Carolina	$2.70	$13,500	$13,500	$0.13	—
North Dakota	$2.80	$14,000	$14,000	$0.12	—
Ohio	$2.80	$14,000	$14,000	$0.15	—
Oklahoma	$2.60	$13,000	$13,000	$0.12	—
Oregon	$2.80	$14,000	$14,000	$0.13	—
Pennsylvania	$2.90	$14,500	$14,500	$0.17	—
Rhode Island	$3.00	$15,000	$15,000	$0.24	—
South Carolina	$2.70	$13,500	$13,500	$0.14	—
South Dakota	$2.70	$13,500	$13,500	$0.13	—
Tennessee	$2.70	$13,500	$13,500	$0.12	—
Texas	$2.50	$12,500	$12,500	$0.13	~11
Utah	$2.60	$13,000	$13,000	$0.11	—
Vermont	$3.00	$15,000	$15,000	$0.21	—
Virginia	$2.80	$14,000	$14,000	$0.14	—
Washington	$2.80	$14,000	$14,000	$0.11	~19
West Virginia	$2.80	$14,000	$14,000	$0.13	—
Wisconsin	$2.80	$14,000	$14,000	$0.16	—
Wyoming	$2.80	$14,000	$14,000	$0.12	—

Data sources: NREL Q1 2024 cost benchmarks, EIA 2024 average residential rates, PVWatts v8 production estimates with 0.83 derate factor.

10 Cheapest States for Solar Installation

These states offer the lowest per-watt installed costs, driven by installer competition, favorable permitting, and lower labor costs:

Rank	State	$/W	5 kW Gross Cost	Key Factor
1	Arizona	$2.50	$12,500	Huge market, simple permits
2	Texas	$2.50	$12,500	High competition, no income tax (but no state credit)
3	Florida	$2.60	$13,000	Large market, sales tax exempt
4	Nevada	$2.60	$13,000	Strong solar market, NV Energy incentives
5	New Mexico	$2.60	$13,000	Good sun, growing market
6	Oklahoma	$2.60	$13,000	Low labor costs
7	Utah	$2.60	$13,000	Competitive market, tax credit
8	Alabama	$2.70	$13,500	Low labor costs
9	Arkansas	$2.70	$13,500	Low labor costs
10	Georgia	$2.70	$13,500	Growing market, moderate labor

Note that cheapest installation does not always mean best value. On the full gross cost with $0 federal credit (2026), Arizona at $2.50/W with $0.14/kWh electricity has roughly an 11-year payback, while low-rate states like Arkansas at $2.70/W with $0.11/kWh electricity run well beyond 15 years.

10 Most Expensive States for Solar Installation

Higher costs in these states are driven by complex permitting, high labor rates, and in some cases, limited installer competition:

Rank	State	$/W	5 kW Gross Cost	Why It's Expensive
1	DC	$3.20	$16,000	High labor, complex urban permitting
2	Connecticut	$3.10	$15,500	High labor, regulatory overhead
3	Hawaii	$3.10	$15,500	Equipment shipping, island logistics
4	Massachusetts	$3.10	$15,500	High labor, complex permitting
5	New York	$3.10	$15,500	High labor, varied local permits
6	Alaska	$3.00	$15,000	Remote logistics, short season
7	California	$3.00	$15,000	High labor, NEM 3.0 complexity
8	New Hampshire	$3.00	$15,000	Small market, high labor
9	Rhode Island	$3.00	$15,000	Small market, high labor
10	Vermont	$3.00	$15,000	Small market, rural logistics

Despite higher installation costs, many of these states deliver the best payback because electricity rates are also high. On the full gross cost with $0 federal credit (2026), Massachusetts at $3.10/W but $0.28/kWh achieves roughly a 7-year payback — still faster than Texas at $2.50/W but $0.13/kWh (~12-year payback).

Cheapest to install isn't best value: Hawaii and Massachusetts cost the most per watt (~$3.10/W) yet pay back in 5–6 years thanks to high electricity rates, while cheap-to-install Texas ($2.50/W) takes about 10.

States with the Best Incentives

The federal residential credit (IRC §25D) expired Dec 31, 2025, so owned 2026 systems get $0 federal (a lease/PPA can still use the commercial §48E credit, claimed by the provider). These state programs remain and add significant extra value:

New York — NY-Sun Program

Residential rebates up to $0.20/W through NYSERDA. For a 5 kW system, that is up to $1,000 (the federal §25D credit it used to stack on expired Dec 31, 2025 for owned systems). Combined with high electricity rates ($0.24/kWh), New York is still one of the better states for solar ROI despite above-average installation costs.

Massachusetts — SMART Program

The Solar Massachusetts Renewable Target program pays performance-based incentives of $0.03–$0.06 per kWh produced over 10 years. For a 5 kW system producing 6,500 kWh/year, that adds $195–$390/year in additional income on top of electricity savings.

New Jersey — TRECs

Transition Renewable Energy Certificates are earned for every MWh of solar production and can be sold for $0.04–$0.06/kWh. A 5 kW system generating 6,800 kWh/year earns $272–$408/year in TREC income.

Illinois — SRECs

Illinois Solar Renewable Energy Credits are worth $60–$80 each (1 per MWh produced). A 5 kW system producing 6,500 kWh/year earns 6.5 SRECs annually, worth $390–$520.

Connecticut — RSIP

The Residential Solar Investment Program provides performance-based incentives that vary by utility territory. The program has been one of the most successful state solar programs in the US.

Maryland — State Tax Credit

Maryland offers a state income tax credit of up to $1,000 for residential solar installations. The federal §25D credit it used to stack with expired Dec 31, 2025, so owned 2026 systems get $0 federal.

California — NEM 3.0

While not a rebate, California's net metering policy (NEM 3.0, effective April 2023) still provides value for solar production, though at reduced export rates compared to the previous NEM 2.0 program. The extremely high electricity rate ($0.25/kWh) means solar still pencils out well, especially when paired with battery storage.

How to Evaluate Solar Value in Your State

The installed cost per watt is just one variable. To determine whether solar is a good investment in your state, evaluate all three factors together:

1. Net cost after all incentives

Start with the installed cost. The 30% federal §25D credit expired Dec 31, 2025, so an owned 2026 system subtracts $0 federal (a lease/PPA can still use the commercial §48E credit, claimed by the provider). Then subtract any state rebates, tax credits, or SRECs. This is your true out-of-pocket cost.

2. Annual production value

Multiply your expected annual production (use PVWatts for your specific address) by your electricity rate. If your state has SRECs or performance incentives, add that income.

3. Simple payback

Divide net cost by annual production value. Under 8 years is excellent. 8–12 years is good. Over 12 years means the financial case is weaker (though still positive over the 25-year panel life).

Example — Massachusetts vs. Texas:

Factor	Massachusetts	Texas
Installed cost (5 kW)	$15,500	$12,500
Federal credit (§25D, expired 12/31/2025)	$0	$0
State incentives	-$1,500 (SMART est.)	$0
Net cost	$14,000	$12,500
Annual production	6,500 kWh	7,863 kWh
Electricity rate	$0.28/kWh	$0.13/kWh
Annual savings	$1,820	$1,022
SMART income	$325/year	$0
Total annual value	$2,145	$1,022
Payback	~7 years	~12 years

Massachusetts costs more to install but delivers almost twice the annual value, resulting in a payback period well under that of Texas. This is why installed cost alone is a misleading metric.

How to Get the Best Solar Quote in Your State

Use comparison platforms. EnergySage, SolarReviews, and similar platforms let you compare multiple installer quotes side by side. Always get at least three quotes before committing.

Compare on a $/W basis. This normalizes across system sizes and makes quotes directly comparable. Ask each installer for the total installed cost divided by the system's DC wattage.

Check installer credentials. Look for NABCEP-certified installers, verify their state contractor's license, and check reviews on Google and the Better Business Bureau. A slightly higher price from a reputable installer is usually worth it for warranty support.

Understand the equipment. Not all $2.80/W quotes are equal. Compare panel brand and warranty (25 vs. 30 years), inverter type (string vs. microinverter), and what is included in the monitoring package.

Ask about financing. Many installers offer $0-down solar loans at 4–7% APR. Compare the total cost of financing (principal + interest over the loan term) to the total electricity savings over the same period. In high-rate states with faster payback, the monthly loan payment can be close to or below the electricity savings; elsewhere it typically runs somewhat higher at first.

Verify net metering terms. Before signing, confirm your utility's net metering policy. The installer should handle the interconnection application, but you should understand the terms — particularly the credit rate for exported power and any caps on system size.