Solar costs, explained
Solar panels are cheaper. Why is the installation still expensive?
A panel-price headline is a starting point. Your decision depends on a complete quote, the electricity your roof can produce, and what that electricity is worth to you.
By FrugalWatt · September 16, 2026 · Sources reviewed with AI assistance. No installer assessment or expert review is claimed.
Compare its installed price per watt and estimated payback using your own generation and utility assumptions.
Check my solar quote →What does “12 cents per watt” actually describe?
A September 16 TechSpot report describes panel prices falling from roughly $5–$6 per watt around 2000 to about $0.12 per watt, attributing the comparison to Ember’s Dave Jones. It discusses a global manufacturing and grid story. That figure is not a US homeowner’s installed quote or a price available from every supplier.
Even taking $0.12/W at face value, 8,000 watts × $0.12 is $960 for the panels in this illustration. It does not price a complete, permitted, grid-connected rooftop installation. Do not use that multiplication as a budget for the whole project.
What else is in an installed solar price?
The DOE cost model separates modules, inverters, storage, structural and electrical hardware, fieldwork, office work, and other costs. Its 2025 Q1 modeled market benchmark for an 8 kW residential PV-only system is $2.95/W, expressed in 2024 dollars and before owner subsidies. That dated benchmark is context, not a current local quote or a ceiling on a reasonable price.
Request a cash price for the solar-only scope. Ask for batteries, roof work and financing charges separately. Then compare proposals using the same system capacity, expected production, equipment, warranties and included work.
- Equipment: exact panel and inverter models, DC system size, and monitoring.
- Installation scope: mounting, electrical work, permits, interconnection, and exclusions.
- Later costs: maintenance responsibilities, insurance changes, and who pays for removal if the roof needs work.
- Financing: cash price, financed principal, fees, APR, term and total payments. A smaller monthly payment alone does not establish a cheaper project.
A worked example: $24,000 for an 8 kW system
Illustrative inputs, not market averages: $24,000 installed cash price, 8 kW DC, 10,000 kWh in year one, 50% used at home, $0.25/kWh avoided purchases, $0.05/kWh usable export credit, and $100 annual upkeep. No incentive is assumed.
Installed price: $24,000 ÷ 8,000 W = $3.00/W.
Self-use: 5,000 kWh × $0.25 = $1,250.
Exports: 5,000 kWh × $0.05 = $250.
First-year net benefit: $1,250 + $250 − $100 = $1,400.
Simple payback: $24,000 ÷ $1,400 = 17.1 years.
If exports have no usable value, that same example produces $1,150 a year after upkeep, with a simple payback of 20.9 years. The panel price has not changed; the value of the electricity has.
Try these numbers in the calculator →Which electricity price belongs in the calculation?
Use the charges you actually avoid by buying one fewer kWh. An unchanged monthly service fee is not a solar saving. Electricity sent to the grid needs its own effective credit: check your utility’s tariff, credit expiry, annual settlement, non-bypassable charges and any export limits.
For time-of-use rates, a single annual price is only an approximation. The timing of generation and household demand matters. A solar system producing as many kWh as you use annually does not, by itself, mean a zero bill. Ask the installer for a bill comparison using your actual tariff.
Use an installer’s documented year-one AC generation estimate, or explore PVWatts with your location and proposed system. Our calculator accepts that estimate; it does not evaluate your roof or calculate output from your address.
Do not automatically subtract a 30% federal credit
The IRS Residential Clean Energy Credit page says the credit is unavailable for property placed in service after December 31, 2025. For a new homeowner-owned installation in 2026, do not assume the former 30% credit. Confirm any separate state or utility incentive and when you would receive it.
What this comparison can help you decide
Use it to identify the assumptions worth challenging: an optimistic generation estimate, exported power valued too highly, missing annual charges, or incentives that have not been confirmed. It does not assess installation quality, roof suitability, financing, batteries, leases, or power purchase agreements.
A useful next conversation is: “Please show me the cash price, how you estimated generation, and which utility rules support these savings.”
Model and examples are FrugalWatt’s own screening calculations. They are estimates, not a guarantee of savings. How we verify · Compare heating costs