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Detailed cost breakdown by system size and state. Equipment, labor, permits, and interconnection costs. Before and after incentives pricing.
$1.80-2.55/W
Small Business
$1.40-1.90/W
Mid-Size
$1.10-1.50/W
Large-Scale
30-70% reduction
After Incentives
Commercial solar costs $1.10-2.55 per watt installed in 2026. Small business systems (25-100kW) cost $1.80-2.55/W ($45K-$255K total). Mid-size systems (100-500kW) cost $1.40-1.90/W ($140K-$950K). Large-scale systems (500kW-2MW) cost $1.10-1.50/W ($550K-$3M). After the 30-70% federal ITC stacking, MACRS depreciation, and state incentives, net costs are typically 30-70% lower.
$1.8-$2.55/W
$1.4-$1.9/W
$1.1-$1.5/W
Solar Panels & Inverters
Tier 1 panels, string or microinverters, racking
$78,750
45%
Installation Labor
Prevailing wage electricians and roofers
$35,000
20%
Balance of System
Wiring, conduit, disconnects, monitoring
$26,250
15%
Permits & Engineering
Structural analysis, electrical design, permits
$17,500
10%
Interconnection
Utility interconnection, meter upgrade
$8,750
5%
Overhead & Margin
Project management, insurance, warranty reserves
$8,750
5%
Example breakdown for a 100kW system at $1.75/W ($175,000 total)
| State | Small (25-100kW) | Mid (100-500kW) | Large (500kW-2MW) |
|---|---|---|---|
| Massachusetts | $2.1-2.55/W | $1.6-1.9/W | $1.2-1.5/W |
| New Hampshire | $2-2.45/W | $1.55-1.85/W | $1.15-1.45/W |
| Maine | $1.95-2.4/W | $1.5-1.8/W | $1.15-1.45/W |
| Vermont | $2-2.45/W | $1.55-1.85/W | $1.15-1.45/W |
| Rhode Island | $2.05-2.5/W | $1.55-1.85/W | $1.15-1.45/W |
| Connecticut | $2.1-2.55/W | $1.6-1.9/W | $1.2-1.5/W |
| Pennsylvania | $1.9-2.35/W | $1.45-1.8/W | $1.1-1.4/W |
| New Jersey | $1.95-2.4/W | $1.5-1.85/W | $1.15-1.45/W |
| Texas | $1.8-2.2/W | $1.4-1.7/W | $1.1-1.35/W |
| California | $2-2.5/W | $1.55-1.9/W | $1.15-1.5/W |
| New York | $2.1-2.55/W | $1.6-1.9/W | $1.2-1.5/W |
100 kW
System Cost
$165K
Federal ITC
-$66K
Net Cost
$24K
Payback
0.6 yrs
Annual Savings
$39,210/yr
25-Year ROI
4976%
CO2 Offset
1225 tons
Commercial solar costs $1.10-2.55/W installed in 2026 depending on system size. Small business (25-100kW): $1.80-2.55/W. Mid-size (100-500kW): $1.40-1.90/W. Large-scale (500kW-2MW): $1.10-1.50/W.
Site-specific pricing with exact incentive calculations. No obligation, no pressure.