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. Assumptions:. 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. How Does the Calculator Work?Exceptional Job Growth: Solar installer positions are projected to grow 48% from 2023 to 2033, making it one of the fastest-growing occupations in the U.