{"id":4154,"date":"2024-10-07T14:01:10","date_gmt":"2024-10-07T14:01:10","guid":{"rendered":"https:\/\/www.sunhub.com\/blog\/?p=4154"},"modified":"2025-06-20T04:06:30","modified_gmt":"2025-06-20T04:06:30","slug":"critical-factors-driving-solar-project-costs","status":"publish","type":"post","link":"https:\/\/www.sunhub.com\/blog\/critical-factors-driving-solar-project-costs\/","title":{"rendered":"6 critical factors driving solar project costs<\/strong>"},"content":{"rendered":"\n

Many customers tell us that vendors tend to shy away from addressing costs directly when they shop for solar systems online. If you’re focused on understanding the financial side, let\u2019s dive into the main factors driving solar project costs and how you can boost your return on investment (ROI).<\/p>\n\n\n\n

If you\u2019re focused on cost or just love details, this blog is for you.<\/p>\n\n\n\n

Solar Material Costs Have Dropped Significantly<\/strong><\/h2>\n\n\n\n

The cost of installing solar has decreased by nearly 90% since 2010, thanks to trends like Swanson’s Law. This rule, observed by SunPower’s Richard Swanson, explains that for every doubling of solar module shipments, prices fall by 20%. Over time, this means much lower costs for consumers.<\/p>\n\n\n\n

Price Per Watt (PPW) is a common way to compare quotes. It\u2019s calculated by dividing the gross system cost (permits, materials, warranties, etc.) by the system size (panel DC watts number of panels). The average residential system is priced just under $3\/watt, and tax credits can reduce that further.<\/p>\n\n\n\n

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Three Types of Solar Panels: Choose Wisely<\/strong><\/h2>\n\n\n\n

Solar panels are a long-term investment, so quality matters. Here’s a quick rundown:<\/p>\n\n\n\n