A 6 to 8 kW residential solar system runs $15,000 to $25,000 installed in 2026, which works out to roughly $2.50 to $3.50 per watt before any incentives. The 30% federal tax credit that shaped solar pricing for a decade expired on December 31, 2025, so buyers now pay full price and the payback math changed for good. Here’s what you’ll actually pay, where the money goes, and how to keep the total down.
What Changed When the Federal Credit Ended
The residential clean energy credit (IRS Section 25D) covered 30% of installed solar cost through the end of 2025. On a $22,000 system, that was a $6,600 haircut. It’s gone now, and there’s no phase-out or replacement at the federal level.
Here’s what that does to payback. Before the credit expired, a typical system paid for itself in roughly 7 to 9 years in a mid-priced electricity market. Without it, the same system now lands at 11 to 15 years in many states. Equipment prices did keep falling, but a 10% price drop doesn’t come close to replacing a 30% credit.
Solar didn’t stop making sense. It stopped being a slam dunk everywhere. In states with expensive power, like Massachusetts, California, or Connecticut, the math still works. In states where electricity runs 11 or 12 cents per kWh, panels are now a slow investment, not a good one. Check dsire.org for state credits, rebates, and SREC programs, because those now carry the weight the federal credit used to.
What Drives the Price
Installers quote per watt for a reason: most of the cost scales with system size. But the per-watt number itself moves based on your roof, your equipment choices, and who’s doing the work.
| Cost component | Share of installed cost | Notes |
|---|---|---|
| Panels | 25-35% | Standard black monocrystalline is the default now |
| Inverters | 10-15% | String inverters cost less; microinverters cost more per panel |
| Racking and mounting | 5-10% | More on tile or complex roofs |
| Wiring, disconnects, electrical work | 5-10% | Rises if your panel needs an upgrade |
| Labor | 15-20% | Two to three crew-days for a typical job |
| Permitting, inspection, interconnection | 3-7% | Varies wildly by city |
| Installer overhead and margin | 10-20% | This is where quotes differ most |
The cheapest quotes usually trim the last line. The most expensive ones pad it. Everything else stays within a fairly narrow band, which is why two bids for the identical system can differ by thousands.
Roof specifics matter more than most salespeople admit. A straightforward asphalt shingle roof with open sun is the baseline price. Add $1,500 to $3,000 or more if the crew is working around multiple roof faces, steep pitch, tile roofing, or a tall two-story layout. And if your main electrical panel is an old 100-amp unit, expect a $1,500 to $3,000 panel upgrade line item on top.
Orientation math is simple but worth doing. South-facing panels at a decent pitch capture close to full production. East-west splits give up roughly 10 to 15%. Heavy shade from a big oak can erase 30% or more of a panel’s output, and no price discount fixes that.
Real-World Examples
Three jobs, three different totals, itemized the way a good quote should be.
Scenario 1: 6 kW on a ranch house in Arizona. Simple roof, great sun. Panels $4,700, inverter $1,500, racking $900, electrical $800, labor $2,700, permits and interconnection $1,000, overhead and margin $4,000. Total: about $15,600, or $2.60 per watt. Production runs near 10,000 kWh a year, and at Arizona rates around 15 cents, that’s about $1,500 in annual savings. Payback: roughly 10 to 11 years.
Scenario 2: 8 kW on a two-story colonial in Massachusetts. Panels $6,800, inverter $2,100, racking $1,300, electrical $1,200, labor $4,300, permits $1,500, overhead and margin $5,000. Total: about $27,200, or $3.40 per watt. Production is lower per kW up north, around 9,600 kWh a year, but Massachusetts power costs over 30 cents per kWh. That’s roughly $2,900 in annual savings, so payback lands near 9 to 10 years even without the federal credit. State incentives and SREC income can pull that lower.
Scenario 3: 10 kW in California under NEM 3.0. Panels $8,200, inverter $2,600, racking $1,500, electrical $1,400, labor $5,200, permits $1,800, overhead and margin $6,300. Total: about $31,000, or $3.10 per watt. Here’s the catch: California’s net billing policy now pays new solar customers near-wholesale rates, around 5 cents, for exported power. Self-consumed power still offsets a 35 to 45 cent retail rate, so a solar-only home that uses most of its own production still does fine. A home that exports most of it doesn’t, which is why battery pairing became standard there.
Cash vs Loan vs Lease
Cash is cheapest over the system’s life and simplest to sell with the house. You carry the full $15,000 to $25,000, own the equipment, and keep every dollar of savings.
A solar loan gets you the same ownership with no upfront cost. Dealer-fee-loaded loans roll a 15 to 30% fee into the balance, so the “same system” financed costs $19,000 to $30,000 instead of $15,000 to $25,000. Low APR is often the giveaway; the fee hides in the principal. If you finance, compare the cash price against the loan principal and ask the installer to show the dealer fee in dollars.
Leases and PPAs are the trap file. You pay a fixed monthly bill to a third party that owns the panels, often with a 2 to 3% annual escalator baked in. That escalator can outpace utility inflation, so your “savings” shrink every year. Selling a leased-system house also means lease assumption or a buyout, and both add friction to a sale. Leases make sense mainly for people who want predictable bills with zero maintenance responsibility. Everyone else should price ownership first.
How to Pay Less
Get at least three quotes, and make each bidder quote the same system size and equipment tier so the bids compare cleanly. Price spreads between reputable installers in the same town routinely hit 20 to 30%.
Buy in the slow season. Late fall and winter bookings often come with better pricing because crews are hungry. Group-purchase programs, usually run as “Solarize” campaigns through towns or nonprofits, knock 10 to 15% off by aggregating buyers.
Ask about equipment tiers. Premium black-on-black panels with 25-year product warranties cost more than standard ones. A mid-tier panel from a manufacturer likely to exist in 20 years is the value play. Also confirm whether the quote includes a load-side tap or line-side connection, which can avoid a $1,500 to $3,000 main panel upgrade.
Verify every claimed incentive yourself on dsire.org rather than trusting a sales deck. We’ve seen quotes that still referenced the expired federal credit.
Mistakes to Avoid
Don’t put new panels on an old roof. If your shingles have less than 10 years left, replace the roof first, because a panel removal-and-reinstall job later costs $3,000 to $5,000 and wipes out years of savings. Our roof replacement cost guide covers that decision.
Don’t sign anything at the kitchen table. A legitimate installer expects you to compare. If a salesperson pushes a “today only” price, that’s one of the classic contractor quote red flags.
Don’t size the system off your oldest utility bill. Size it off current usage minus any changes you’ve made, like a new heat pump. And don’t accept a verbal production promise. Make the installer put an estimated annual kWh figure in the contract, with the assumptions listed.
Bottom Line
Budget $2.50 to $3.50 per watt, or $15,000 to $25,000 for the 6 to 8 kW system most homes need. Without the federal credit, expect an 11 to 15 year payback in many states, faster where power is expensive and slower where it’s cheap. Buy with cash or a clean loan if you can, treat leases as a last resort, and collect three quotes before you sign anything. If you’re weighing storage, our solar battery cost guide breaks down when a battery earns its keep. Wondering about resale? See do solar panels increase home value.
FAQ
How much do solar panels cost for a 2,000 square foot house?
Most 2,000 square foot homes land at 6 to 8 kW, which means $15,000 to $25,000 installed in 2026. Your usage matters more than square footage, so pull 12 months of bills first. A house running a pool pump and electric heat needs more panels than the same floor plan with gas heat.
Is solar still worth it without the federal tax credit?
In high-rate states, usually yes, with paybacks of 9 to 12 years against 25-plus years of equipment life. In states with cheap power, the math is now marginal and sometimes negative. Run your own numbers: system cost divided by first-year savings, using your actual utility rate.
How long do solar panels last?
Quality panels carry 25-year performance warranties and typically degrade about 0.5% per year, so a panel at year 25 still makes roughly 87% of its original output. Inverters are the weak point. String inverters usually need replacement once, around year 10 to 15, at $1,500 to $3,000.
Do I need a battery with my solar system?
No, not for savings in most states. Batteries mostly buy outage protection and higher self-consumption in time-of-use or net-billing markets. They add $10,000 to $16,000 installed, so we treat them as a separate purchase decision.