Cost & Savings

Solar Panel Installation Cost

By Shehzad Hussain

What does solar panel installation cost? See the full breakdown — equipment, labour, permits and inspection — for any system size.

Your system

System size (kW)

Cost per watt ($)

Estimates only. Installation costs vary by roof type, state and installer — a steep or tile roof, a long wiring run or extra electrical work can all move the price. The breakdown is a typical split (equipment 60%, labour 25%, permits & inspection 8%, misc 7%). Get at least two local quotes before deciding. Incentives vary by state/country and change — check current local rules.

What makes up solar installation cost?

Equipment, labour, permits and miscellaneous. The calculator splits your total as: equipment 60% (panels, inverter, mounting, wiring), labour 25%, permits and inspection 8%, and miscellaneous 7%. At $2.90 per watt, an 8 kW system costs about $23,200: roughly $13,920 equipment, $5,800 labour, $1,856 permits and inspection, and $1,624 miscellaneous.

Quotes vary because roofs vary. A steep or old roof, a panel upgrade, a long wire run, or difficult access can add thousands. Panel and inverter brands move the equipment share; local permit fees move the permits share. Three quotes usually reveal the fair local range — and the range shown here (±15%) is the honest spread to expect.

All figures are post-credit: the US 30% federal residential solar credit ended on 31 December 2025. Reputable installers include permits and inspection in their quote — always ask for an itemised quote so you can see what is included before you sign.

Price your system with the cost calculator, or see when it pays back with the payback calculator.

How to use the Solar Panel Installation Cost

Enter your system size in kW.
Set your cost per watt ($2.90 is a typical US installed figure).
Read off the total and the breakdown: equipment 60%, labour 25%, permits and inspection 8%, miscellaneous 7%.
Compare the range (±15%) with your local quotes.

Frequently asked questions

What does it cost to install solar panels?

At $2.90 per watt, an 8 kW system costs about $23,200 installed: roughly $13,920 equipment, $5,800 labour, $1,856 permits and inspection, and $1,624 miscellaneous. The US 30% federal credit ended on 31 December 2025, so these are post-credit figures.

Why do solar installation quotes vary so much?

Roof type and condition, panel and inverter brands, scaffolding needs, local permit fees, and installer overhead all move the price. A steep or old roof, a panel upgrade, or a long wire run can add thousands. Three quotes usually reveal the fair local range.

Are permits included in solar installation cost?

Usually, yes — reputable installers include permits and inspection in their quote, about 8% of the total here. Always ask for an itemised quote so you can see what is included before you sign.

More calculators from the same category.

Cost & Savings Popular Solar Panel Cost Calculator How much do solar panels cost? Price your system by size and cost per watt, with equipment and labour split — free, no signup. Use tool → Cost & Savings Solar Savings Calculator How much can I save with solar panels? Estimate year-1, monthly and 25-year savings from your system size and electricity rate. Use tool → Cost & Savings Solar Payback Calculator How long until solar panels pay for themselves? Work out simple payback and a realistic payback range from cost and yearly savings. Use tool →

What makes up solar installation cost?

How to use the Solar Panel Installation Cost

Frequently asked questions

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