Install Solar Panels Cost Calculator & Price Guide

Installing solar panels on a house typically costs $19,100 – $23,800 for a 7.6 kW system before incentives, according to Fixr. Solar is priced by system size, so the useful way to compare quotes is the cost per watt, then the total for the size your home needs.

The figures below come from three published guides and carry a check date of Oct 11, 2026. They report system totals at 6, 8, and 10 kW, which lets you see how price scales with size.

The three sources give different totals for the same system size, and the gap grows as systems get larger. Each guide uses its own pool of quotes and assumptions about equipment, so the totals reflect a range of real-world pricing rather than a single correct number.

Every figure here is before incentives. Incentives change with time and by location, so confirm what applies to your address before you rely on any net-cost estimate.

Installers and guides quote solar by the watt of installed capacity. Dividing the total by the system size in watts gives a number you can compare across quotes, regardless of how many panels are used.

A lower price per watt is not automatically better. It may reflect lower-efficiency panels, a shorter warranty, or fewer included services. Compare it alongside equipment quality and what the quote covers.

Searches for solar cost per square foot usually mean one of two things: the roof area the panels occupy, or the size of the home. Solar is priced by the capacity of the system you install, and the capacity you need follows your electricity use rather than your floor area. Roof area matters mainly as a limit on how many panels fit.

• System size. More capacity costs more in total, though the price per watt often drops slightly as size rises.
• Equipment. Panel efficiency and brand, inverter type, and whether the system includes battery storage all change the price.
• Roof type and condition. Complex roofs, steep pitches, and roofs that need repair first add labor and cost.
• Electrical work. An older electrical panel may need an upgrade before the system can connect.
• Permits and interconnection. Local permit fees, inspection, and utility interconnection rules vary by area.
• Installer. Overhead, sales costs, and labor rates differ among installers, which is why quotes for the same system can diverge.
• Location. Labor and permitting costs vary by region.

The federal residential clean energy credit, also known as the 25D credit, does not apply to systems placed in service after December 31, 2025, according to the IRS. Read the IRS guidance on the residential clean energy credit for current rules.

State programs, local utility rebates, and net metering policies differ widely and change often. Ask each installer which ones apply to your address, and have them show the quote with and without incentives so you can compare the true cost of each option.

Each guide in the tables above pulls from its own data, such as marketplace quotes, installer surveys, or modeled estimates. They also assume different equipment tiers and system sizes. Differences in what counts as the installed price, such as permits, interconnection, and sales costs, widen the gap further.

Treat the published figures as a reasonable range for planning. Your actual quote will depend on your roof, your utility, and the equipment you choose.

Buying a system, with cash or a loan, means you own it and receive any incentives that apply to owners. A lease or power purchase agreement lowers the upfront cost but means a third party owns the system, and the payments continue for years. Read the contract for escalator clauses, transfer terms if you sell the home, and what happens at the end of the term.

Installing a grid-tied system yourself is rarely practical. It involves roof work, high-voltage wiring, permits, and utility approval, and most utilities will not interconnect a system without a licensed installer's sign-off. Mistakes can create fire and shock hazards, and unlicensed work can void roof and equipment warranties.

• What is the price per watt, and what is included in it?
• Which panels and inverter are quoted, and what are the equipment and workmanship warranties?
• Who handles permits and utility interconnection?
• How was the system size calculated from my electricity usage?
• Will the roof need repair, and how does installation affect my roof warranty?
• Which incentives apply, and how are they shown in the price?

Collect several written quotes and compare them on a per-watt basis.