In the most common US installations, labor costs range from roughly $0. For a 6 kW residential system, this translates to about $2,400 to $6,000 in installer labor, depending on roof pitch, accessibility, and crew efficiency. NLR analyzes the total costs associated with installing photovoltaic (PV) systems for residential rooftop, commercial rooftop, and utility-scale ground-mount systems. This work has grown to include cost models for solar-plus-storage systems. Through 2022, benchmarks were developed using bottom-up. Each year, the U. Labor costs are determined by various factors including geographical location, the complexity of the installation, and skill level of the workforce, 2. We compared research from government and solar.