A professionally installed home solar system in the United States is usually $18,000 to $41,000 before state or local incentives and without a battery.
For many homes, a planning budget of $20,000 to $35,000 is reasonable. EnergySage's 2026 marketplace data puts the average cost at about $18,340 for a 7 kW system and $31,135 for a 12 kW system. Broader residential benchmarks can reach about $3.39 per watt, which would put a 12 kW system near $40,700.
Typical Solar Panel Costs by System Size
The table below uses a planning range of approximately $2.59 to $3.39 per watt, based on current residential solar pricing data.
| Solar system size | Approximate installed cost | Suitable for |
|---|---|---|
| 5 kW | $13,000 to $17,000 | Small home or low electricity use |
| 7 kW | $18,000 to $24,000 | Small to medium home |
| 8 kW | $21,000 to $27,000 | Medium home |
| 10 kW | $26,000 to $34,000 | Larger home or higher electricity use |
| 12 kW | $31,000 to $41,000 | Large home or high electricity use |
These estimates generally cover a grid-connected photovoltaic system, including panels, inverters, racking, wiring, labor, permits and utility interconnection.
The panels themselves account for only part of the price. EnergySage estimates that panels make up about 12% of a typical system quote. The rest covers other equipment, installation and business costs.
How Much Does a Solar Battery Add?
A home solar battery can add about $15,000 before incentives. The final price depends on the battery's storage capacity, installation requirements and brand.
A battery can keep selected appliances running during an outage and store daytime solar power for use at night. It is not required for every solar installation.
Estimated totals for one battery are:
- Solar only: $18,000 to $41,000
- Solar plus battery: $33,000 to $56,000 or more
Is There Still a 30% Federal Solar Tax Credit?
No. The federal 30% Residential Clean Energy Credit is not available for a new system installed after December 31, 2025. The Internal Revenue Service says the credit applied to qualifying residential clean-energy property installed through that date.
Some states, utilities and local governments may still offer rebates, performance payments, net-metering benefits or other incentives. Eligibility depends on your address and utility company. The Department of Energy points homeowners to DSIRE for current state and local incentive information.
What Determines the Final Price?
A quote can fall outside the national range because of:
- Electricity use: Higher household consumption usually requires a larger system.
- Roof condition: You may need to repair or replace the roof before installation.
- Roof design: Multiple roof sections, steep slopes and complex layouts increase labor costs.
- Shade and orientation: Trees, chimneys and nearby buildings can reduce production or require a larger system.
- Electrical upgrades: Some homes need a new electrical panel or additional wiring.
- Local labor and permitting: Installation prices vary by state and city.
- Equipment: Inverters, optimizers, monitoring systems and premium panels affect the quote.
- Battery storage: Backup power adds to the project cost.
The Department of Energy says solar savings depend on system size, household electricity use, roof direction, sunlight, utility rates and the payment offered for excess electricity sent to the grid.
Should You Pay Cash, Use a Solar Loan or Sign a Lease?
| Payment option | Main advantage | Main drawback |
|---|---|---|
| Cash purchase | Usually the lowest total system cost | Highest upfront expense |
| Solar loan | Spreads payments over time | Interest and loan fees increase the total cost |
| Solar lease | Low upfront cost | You do not own the equipment |
| Power purchase agreement | You pay for the electricity produced | Contract terms and annual price increases need careful review |
A cash purchase usually has the lowest total cost. A loan reduces the upfront payment but adds interest and other financing costs. With a lease or power purchase agreement, read the ownership terms, payment increases and contract length before signing.
How to Judge Whether a Solar Quote Is Reasonable
Compare at least three installers and ask each company for:
- The total cash price and price per watt.
- Estimated annual electricity production.
- The battery price listed separately from the solar system.
- Confirmation that permits, interconnection and inspections are included.
- Panel, inverter and workmanship warranties.
- Any roof repair or electrical-panel costs.
- The loan interest rate, fees, total repayment and prepayment terms.
- Confirmation of whether the quote depends on a state rebate or utility program.
Compare cash prices before comparing monthly payments. A low monthly figure can hide a higher total cost caused by loan interest, dealer fees or an escalator clause.
Bottom Line
The best solar budget comes from your electricity use, roof and utility rules, not from a national average alone. Get several itemized quotes and separate the solar, battery, roof and financing costs before deciding.