The average solar farm cost ranges from $600,000 to $1,300,000, with most projects averaging $950,000. Main cost factors include size, equipment, labor, and location. Distributed Solar and Storage annual data update). solar photovoltaic (PV) systems to develop cost benchmarks. These benchmarks help measure progress toward goals for reducing solar electricity costs. Berkeley Lab's “Utility-Scale Solar, 2024 Edition” presents analysis of empirical plant-level data from the U. fleet of ground-mounted photovoltaic (PV), PV+battery, and concentrating solar-thermal power (CSP) plants with capacities exceeding 5 MW AC (PV plants of 5 MW AC or less, including. Building a solar farm costs $0. 30 per watt, not including the land.