On average, labor accounts for 20% to 30% of the total installation cost, depending on your location and system design. While DIY options exist, hiring certified professionals ensures safety, efficiency, and access to warranties, making it worth the extra expense for most. The cost of solar PV modules has seen dynamic shifts. While prices generally declined for years, they experienced increases in 2022 due to tight markets for materials and labor. For example, a global producer price index of solar PV modules developed by the IEA shows that prices fell to a low point. Each year, the U. 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. Let's crack open the toolbox and examine what drives photovoltaic panel construction labor unit prices in today's marke Picture this: A 500MW solar farm needs enough photovoltaic panels to cover 3,000 football fields. This hourly rate covers tasks like mounting panels, wiring, and cleanup. Does labor cost more for complex roofs? Yes.