The number that matters: price per watt
A solar quote for a 10 kW system at $32,000 and one for a 6 kW system at $18,000 are hard to compare as lump sums. Price per watt normalises everything. Divide total price by system watts (system kW × 1,000): $32,000 ÷ 10,000 = $3.20/W and $18,000 ÷ 6,000 = $3.00/W. Now you're comparing apples to apples across different system sizes, states, and equipment tiers.
Why state medians differ
Texas has high installer competition, low permitting costs, and straightforward interconnection — pushing median costs to around $2.60/W. Massachusetts has high labor costs, strict inspection requirements, and a more complex interconnection process — pushing medians to $3.20–3.40/W. Comparing a Texas quote to a Massachusetts benchmark would be misleading; this tool uses your specific state's data.
The second quote saves thousands
Research from the National Renewable Energy Laboratory found that homeowners who obtained multiple quotes saved an average of $3,000–$6,000 on their solar installation. The solar industry has wide price dispersion — two installers using identical equipment can differ by 25–40% on labor and overhead. Getting a second quote is the single highest-ROI action you can take before signing a solar contract.