Solar Cost for a Modular Home

How Much Do Solar Panels Cost on a Modular Home in 2026?

The national average installed cost of residential solar in 2026 sits at $3.10 per watt before incentives, according to NREL’s Solar Installed System Cost Benchmark. For a typical modular home using 900–1,100 kWh per month, that translates to a 6–8 kW system costing $18,600–$24,800 gross, or $13,020–$17,360 after the 30% ITC.

Modular homes don’t carry a solar cost penalty. Because they’re built to the same IRC building codes as stick-built homes and sit on permanent foundations, installers quote them identically. The only exception: if your modular home has an unconventional roof pitch — common in some double-wide designs — labor costs can rise 5–10% due to more complex racking.

Three factors drive most of the price spread between installer quotes. Panel brand and efficiency matter: budget monocrystalline panels (370–400W) cost $0.90–$1.10/W, while premium panels (430–460W) run $1.20–$1.50/W. Inverter type is another lever — string inverters save $800–$1,200 compared to microinverters, which perform better under partial shading from trees or chimneys. Labor market conditions are the third variable: installer competition is thin in rural areas where many modular homes sit, adding $500–$2,000 to the total. SEIA data shows that quotes for identical systems in the same zip code can vary 15–25%, so getting three bids before signing is essential.

Use our solar savings calculator to input your exact utility bill and get a system-size estimate tailored to your home’s consumption.

Is Solar Worth the Cost for a Modular Home in Your State?

Solar pencils out financially in most US states in 2026, but the margin varies enough that running the numbers before signing anything is the right move. According to EIA data, the average US residential electricity rate reached $0.163/kWh in 2025 — a 3.2% year-over-year increase — and rising rates improve solar’s return in every market.

High-value states where payback runs under 8 years include California, New York, Massachusetts, Connecticut, Hawaii, and New Jersey. These combine above-average electricity rates, strong net metering programs, and meaningful state credits. Mid-value states — Colorado, Virginia, North Carolina, Georgia, Oregon, and Illinois — offer payback in 8–11 years: worthwhile for homeowners planning to stay long term. Longer payback states such as Louisiana, Arkansas, West Virginia, and North Dakota have low utility rates that slow the math to 11–14 years, though continued rate increases could shift these within a decade.

Modular homeowners in North Carolina and Tennessee should scrutinize TVA and Duke Energy’s current net metering tariffs — both utilities have reduced export rates in recent years, which shifts the value of solar toward self-consumption and away from grid export. Pairing a modest battery with a rooftop array can restore much of that lost value: a 5 kWh battery paired with a 6 kW system can raise self-consumption from roughly 40% to 70%, capturing savings that would otherwise be exported at low avoided-cost rates. Panel degradation of 0.5%/year is already built into NREL’s 25-year production models, so published payback figures already account for declining output.

Use our solar ROI calculator to get a personalized 25-year cash flow projection for your address, current utility rate, and financing terms.

Pull at least three installer quotes before committing — then use our solar ROI calculator to enter each quote and compare the 25-year return on every option with exact figures.