With tax credits and other incentives, solar panels for commercial buildings cost $1. Whether you manage a manufacturing plant, office complex, retail chain, or agricultural operation, this article will equip you. . Commercial solar panels cost $2. 50 per watt installed before incentives. Saving up to 75% on electricity helps offset the commercial. . Cost Factors: System size, equipment type, location, energy efficiency, and mounting infrastructure all impact the overall cost of commercial solar installations. Commercial solar systems typically include solar. .