Use this solar cost calculator to estimate how much a home solar installation could cost based on your energy usage.
This tool gives you a quick estimate of system size, installed cost, and expected price range using your monthly electricity bill, electricity rate, shading, and optional battery inputs.
- Estimated system size
- Estimated installation cost
- Estimated cost range
Not sure what a field means? See the Solar Calculator Glossary for quick definitions and examples.
Estimate your solar installation cost
Your estimate
Enter your details and calculate to see a realistic planning estimate for your installed solar cost.
Scenario view
Simpler project conditions and a tighter installation budget.
The most realistic planning estimate based on your current inputs.
Higher project cost assumptions, more shading, or pricier install conditions.
How this solar cost calculator works
This calculator starts with your monthly electricity bill and electricity rate to estimate your annual electricity usage in kWh. From there, it estimates the solar system size that could reasonably serve that level of demand.
It then applies an installed-cost assumption per kilowatt, adjusts for shading, and adds a battery cost if you choose one. If you enter usable roof area in the advanced options, the tool also checks whether the estimated system is likely to fit on your roof.
Assumptions used in this calculator
This tool is designed as a U.S. residential solar planning calculator. The default installed-cost assumption is $2,500 per kW, which is roughly $2.50 per watt.
That default sits in the same general range as recent U.S. residential marketplace pricing published by EnergySage, which reports national consumer pricing around $2.49/W to $2.58/W in recent 2025–2026 data. This calculator is meant to estimate a full installed home solar project, not panel-only pricing. EnergySage solar cost data.
Note: If your local pricing or system assumptions differ, you can fine-tune the estimate using the calculator’s Advanced options. There you can adjust the electricity rate, solar production factor, installed cost per kW, battery cost, and optional roof area to create a more tailored estimate.
The U.S. Department of Energy’s solar PV benchmark work also frames its benchmark systems as representative of what is currently being installed in the United States, which is why this page treats the result as an installed-system planning estimate rather than equipment-only cost. U.S. Department of Energy solar PV cost benchmarks.
Assumptions last reviewed: April 2026. These defaults are planning assumptions, not live installer quotes. Real pricing can vary by state, installer, roof complexity, equipment choice, labor, and local incentives.
What affects solar installation cost most
- How much electricity your home uses
- Your local installation pricing
- Whether you include a battery
- Roof shading and roof complexity
- Equipment choices and installation conditions
In simple terms, a home with higher electricity use usually needs a larger system, and a larger system usually costs more. Battery storage can increase the upfront cost significantly, while shading can reduce production and push system assumptions higher.
What this estimate includes
This estimate is intended to reflect the cost of a full installed residential solar system. That means it is closer to the kind of total project number a homeowner would expect when requesting a quote, rather than the standalone price of solar panels.
What this estimate does not include
- Financing structure or loan terms
- Tax credits or local incentives
- Structural roof repairs
- Premium equipment upgrades
- Permit complexity
- Installer-specific pricing
That is why the result should be used as a planning estimate, not a final purchase decision by itself.
FAQ
How accurate is this solar cost calculator?
This tool is meant for planning and comparison, not as a formal quote. It gives you a useful estimate based on clear assumptions, but real installation prices can vary.
Does this include battery cost?
Yes. If you select a battery, the calculator adds a battery cost estimate to the total project cost.
Is this estimate for panels only or full installation?
This is an estimate for a full installed residential solar system. It is not intended to represent panel-only pricing.
Why does roof shading affect solar cost?
Shading can reduce solar production. That means the system may need stronger assumptions or a larger effective setup to deliver the same level of value.
Can I use this calculator without knowing my roof area?
Yes. Roof area is optional. The main estimate works without it, and roof area is only used as a fit check in the advanced options.
Next step: estimate your solar savings
Once you have a rough cost estimate, the next question is usually how much that system could save you on electricity bills. Use the savings calculator to continue from upfront cost into bill reduction and long-term savings.