The Complete Guide to Solar Trackers
ENSOL Engineering TeamUpdated 2026-02-253 min read
A solar tracker moves modules to follow the sun, raising energy yield over a fixed-tilt structure. Trackers add moving parts, cost and maintenance, so they suit specific projects. This guide explains the types and the trade-offs.
Key takeaways
- Single-axis trackers follow the sun east-west and give a substantial yield gain.
- Dual-axis trackers add more yield at higher cost and complexity.
- Trackers suit open, utility-scale land; fixed tilt suits constrained or low-O&M sites.
- Foundations and wind design must account for the moving structure.
Single-axis vs dual-axis
Single-axis trackers rotate about one axis (usually north-south) and are the common utility choice. Dual-axis trackers add a second axis for maximum yield, used selectively where the extra output justifies the cost.
Trade-offs
The yield gain is weighed against higher capex, drives and bearings to maintain, and terrain suitability. On constrained or maintenance-light sites, robust fixed-tilt structures are often preferred.