2026-03-20 Choosing the right solar foundation is critical to the stability, durability, and cost-effectiveness of a solar power system, as it directly bears the weight of solar panels and resists external forces such as wind, snow, and earthquakes. This article comprehensively compares three mainstream solar foundation types—concrete foundation, screw pile foundation, and ballast foundation—from the aspects of applicable scenarios, advantages, disadvantages, construction difficulty, and cost. It also provides a clear selection guide to help project owners, engineers, and installers make informed decisions based on site geological conditions, project scale, construction cycle, environmental requirements, and budget constraints. Following this guide can not only ensure the long-term safe operation of the solar system but also optimize project costs and construction efficiency, which is of great significance for promoting the smooth implementation of solar projects.