Solar Panel Installation Cost Calculator
Calculate total installed cost for a new solar system by size, panel type, and roof mounting. See your cost per watt, estimated annual energy value, and an itemized breakdown.
Solar Panel Installation Cost Calculator
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Larger systems cost more overall but typically have a lower cost per watt.
Average home. The most common residential system size.
Monocrystalline panels are the most efficient but cost more per watt.
Highest efficiency and best performance in limited roof space. Most common premium choice.
Roof material affects racking complexity and installation labor.
Standard residential roofing. Most common and straightforward install.
Select the option that applies. Battery storage, EV charging, and panel upgrades all add to the total.
No additional add-ons — just the solar system itself.
Your Results
Here's your solar installation estimate.
Total Installed Cost
$15,000 – $22,500
6 kW system, including selected add-ons
Cost Per Watt
$2.50 – $3.75
Total cost divided by system wattage
Est. Annual Energy Value
$1,061 – $1,435
~7,800 kWh/year produced
Cost Breakdown
Tax Credit Note
The federal residential solar tax credit (Section 25D, Residential Clean Energy Credit) has expired for residential systems — it does not apply to expenditures made after December 31, 2025. This estimate does not include any federal tax credit. Check with your installer or a tax professional for any state, local, or utility incentives that may still be available in your area.
Based on
Estimates reflect national averages for educational purposes only. Equipment prices and labor rates vary by region. Always get 2–3 quotes before proceeding.
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What you'll need
- Estimated system size (4kW–12kW+)
- Panel type preference (monocrystalline, polycrystalline, or thin-film)
- Roof or mounting type (asphalt shingle, tile, metal, or ground mount)
- Whether you want battery storage, EV charging, or an electrical panel upgrade
What you'll get
- Total installed cost range — System + racking + selected add-ons
- Cost per watt — Compare pricing across system sizes
- Estimated annual energy value — Projected yearly electricity offset
- Itemized cost breakdown — Panels, mounting, battery, EV charger, panel upgrade
Solar installation cost overview
These ranges reflect $2.50–$3.75 per watt before any incentives. The federal residential solar tax credit (Section 25D) has expired for expenditures made after December 31, 2025, so this calculator does not assume a federal credit applies — verify current state, local, or utility incentives with your installer or a tax professional.
How it works
Choose your system
Select your system size, panel type, and roof or mounting type.
Add your extras
Include battery storage, an EV charger circuit, or an electrical panel upgrade if needed.
Get your estimate
See your total installed cost range, cost per watt, and estimated annual energy value.
Solar Installation Cost by System Size
| System Size | Installed Cost Range | Typical Home |
|---|---|---|
| 4 kW | $10,000 – $15,000 | Small home |
| 6 kW | $15,000 – $22,500 | Average home |
| 8 kW | $20,000 – $30,000 | Large home |
| 10 kW | $25,000 – $37,500 | Very large home |
| 12 kW+ | $30,000 – $45,000 | Whole-home / EV charging |
Ranges reflect $2.50–$3.75 per watt before incentives and vary by panel type and roof/mounting complexity. Does not assume any federal tax credit — the residential solar credit expired after 2025.
Frequently asked questions
How much do solar panels cost to install?
A new residential solar installation typically costs $2.50–$3.75 per watt before any incentives. A common 6 kW system runs $15,000–$22,500, while a large 10 kW system runs $25,000–$37,500. Panel type, roof/mounting complexity, and add-ons like battery storage all shift the total.
How many solar panels do I need?
Most residential panels are rated around 350–450 watts, so a typical 6 kW system needs roughly 14–17 panels, and a 10 kW system needs roughly 23–29 panels. Your exact panel count depends on panel wattage, roof space, and your household's energy usage.
Is there still a federal tax credit for solar panels?
No. The federal residential solar tax credit (Section 25D, the Residential Clean Energy Credit) that offered 30% back on solar costs has expired — it does not apply to expenditures made after December 31, 2025. This calculator does not assume any federal credit. Check with your installer or a tax professional about state, local, or utility incentive programs that may still be available in your area.
How long do solar panels last?
Solar panels are typically warrantied for 25 years and continue producing power well beyond that, usually degrading about 0.5% per year. Inverters generally need replacement after 10–15 years (string inverters) or have longer-lived microinverters, well before the panels themselves wear out.
Is solar worth it without the tax credit?
It can still be worth it, but the payback period is longer without the federal credit. Savings depend heavily on your local electricity rates, sun exposure, system cost, and any remaining state or utility incentives. Run the numbers with a local installer and compare your estimated annual energy offset against the installed cost before deciding.
What size solar system do I need for my home?
Most homes fall in the 4 kW–10 kW range depending on household energy usage, roof space, and sun exposure. A small home may only need 4 kW, an average home typically uses around 6 kW, and homes with a pool, EV charging, or high usage often need 10 kW or more. A recent utility bill and a site assessment from an installer will give the most accurate sizing.
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