Cost of Installation Solar Panels in 2019: What Homeowners Actually Paid

What the Cost of Installation Solar Panels in 2019 Looked Like

In 2019, the cost of installation solar panels for a typical U.S. residential system ranged from roughly $2.80 to $3.80 per watt before incentives. A 6-kilowatt system, the most common size for a family home, therefore landed between $16,800 and $22,800 on the invoice. That range shrank once the federal Investment Tax Credit was applied — a 30% credit that year — bringing net costs to around $11,760 to $15,960 for many households. Local rebates, net-metering policies, and state-level incentives could push the final out-of-pocket figure still lower, which is why the same system might cost two neighbors very different amounts.

Hardware Choices That Shifted the Price

The panels themselves, inverters, racking, wiring, and labor made up the bulk of the cost of installation solar panels in 2019. Monocrystalline panels, more efficient but pricier, typically ran $0.30 to $0.50 per watt higher than polycrystalline alternatives. Microinverters added roughly $0.15 to $0.25 per watt over string inverters, though they simplified panel-level monitoring. Homeowners also paid for permitting, interconnection fees, and any roof repairs needed before mounting, which could add $1,000 to $3,000 depending on the site.

System Size and Real-World Cost Ranges

Larger systems spread the fixed costs of permitting, labor, and interconnection over more watts, so the per-watt price dropped. The table below shows typical gross installation ranges for 2019, before the federal tax credit:

These figures reflect national averages reported by industry trackers and installer quotes. The actual cost of installation solar panels in 2019 depended heavily on the state, the complexity of the roof, and whether the homeowner chose a lease, power-purchase agreement, or cash purchase.

Incentives That Lowered the Net Price

The 30% federal Investment Tax Credit was the single largest reducer of the cost of installation solar panels in 2019. It applied to both purchased and financed systems, but not to leases or PPAs, which changed the calculus for households that wanted no upfront cost. Many states layered on additional credits or rebates — California's SGIP, New York's NY-Sun, and Massachusetts' SMART program, among others — while property tax exemptions in dozens of states meant the added home value from a solar installation did not immediately raise tax bills.

Leases, PPAs, and the Hidden Cost Question

For homeowners who did not want a large upfront payment, solar leases and power-purchase agreements removed the installation cost from the initial bill. The trade-off was a long-term contract with a fixed or escalating rate for the electricity generated, often lasting 20 to 25 years. Buyers of leased systems needed to account for those obligations when selling a home, and the federal tax credit did not flow to the lessee — it stayed with the leasing company. Cash buyers and loan holders captured that credit directly, which is why their effective cost of installation solar panels in 2019 looked lower on a lifetime basis.

What the 2019 Price Tells Us Looking Back

The cost of installation solar panels in 2019 sat in a transitional period. Module prices had already fallen sharply from a decade earlier, but soft costs — permitting, customer acquisition, installer margins, and interconnection — still accounted for a large share of the sticker price. The year also marked a peak period for the 30% federal credit before it began its scheduled step-down, which added urgency for homeowners deciding that year. Comparing 2019 quotes to today's figures helps illustrate how quickly the economics of solar have continued to shift, but for households weighing the decision at the time, the combination of federal credit, falling hardware prices, and rising electricity rates made the investment case unusually strong.