As of 2025, the installation cost for ground-mounted solar panels typically ranges from $1. 50 per watt, depending on factors such as project size, location, site conditions, and the type of mounting system used. This article breaks down current pricing, efficiency benchmarks, and data-driven strategies to optimize solar investments. For a standard 5 kW system, this translates to approximately $7,500 to $12,500. Ground-mounted solar projects typically cost more upfront than rooftop installs due to equipment, site work, and permitting. The main cost drivers are system size, site preparation, permitting, and labor.