On average, a 2 kW solar panel system costs $6,360, according to real-world quotes on the EnergySage Marketplace from 2025 data. This price includes equipment, installation, and other associated costs. That being said, the 2kW solar system price would be roughly $3,584 after the Federal Solar Tax Credit, which. Installing a 2kW solar panel system typically costs between $3,500 and $7,000 before incentives, depending on location, equipment quality, and labor rates. With federal tax credits and local rebates, homeowners can reduce upfront costs by up to 30%, making solar more affordable than ever. However, various factors such as.