Average price of solar modules, expressed in US dollars per watt, adjusted for inflation. Data source: IRENA (2025); Nemet (2009); Farmer and Lafond (2016) – Learn more about this data Note: Costs are expressed in constant 2024 US$ per watt. Department of Energy (DOE) Solar Energy Technologies Office (SETO) and its national laboratory partners analyze cost data for U. solar photovoltaic (PV) systems to develop cost benchmarks. These benchmarks help measure progress toward goals for reducing solar electricity costs. Every month we publish a current price index on the development of wholesale prices of solar modules. Since 2009, pvXchange has provided a unique price index for the european market, which has become an invaluable. The PV Module Price Index is presented by EnergyBin, LLC. to provide the solar industry with historical crystalline-silicon (c-Si) module valuation within the secondary market. The Base Year estimates rely on modeled capital expenditures (CAPEX) and operation and maintenance (O&M) cost estimates benchmarked with industry and historical data. Capacity factor is estimated for. Platts, part of S&P Global Commodity Insights, has observed strong interest in transparent solar module pricing following the exponential growth in the manufacture, trade and installation of solar modules, also referred to as solar panels, globally.