Why Are Most Solar Mounting Systems Made Of Zinc-Aluminum-Magnesium?

Solar mounting systems form the essential framework supporting photovoltaic modules. Their performance directly impacts a solar plant's operational stability, power generation efficiency, and financial returns. That's why the shift to zinc-aluminum-magnesium (ZAM) coatings represents more than a trend-it's a meaningful upgrade in durability, economy, and sustainability.

Fixed vs. Tracking Mounting Systems

Solar support structures fall into two main categories:

Fixed Mounting Systems: Simple, stable, and cost-effective. These systems remain the mainstream choice due to their reliability and low maintenance requirements.

Tracking Systems: Adjust to follow the sun, boosting energy generation by 15–20%. While they increase output, they also involve higher initial costs and require more maintenance.

Both types demand materials that can withstand decades of harsh environmental exposure.

Why Material Matters in Solar Mounting

PV systems are expected to operate reliably for over 25 years in challenging conditions. Mounting systems must resist wind, snow, earthquakes, and corrosion. Traditional materials like hot-dip galvanized steel offered good protection but involved complex processing, additional costs, and environmental trade-offs.

The search for a better alternative led the industry to zinc-aluminum-magnesium.

How Zinc-Aluminum-Magnesium Improves Solar Mounts

ZAM-coated steel offers three clear advantages:

Superior Corrosion Resistance
The magnesium in ZAM promotes the formation of a dense, stable surface layer that significantly slows down corrosion. Test results show that ZAM can offer several times the lifespan of conventional galvanized coatings.

Self-Protecting Cut Edges
During fabrication, cutting and drilling can expose bare metal. ZAM's unique chemistry allows it to form protective films that cover these vulnerable edges, greatly reducing the risk of red rust.

Easier Fabrication
ZAM has a lower friction coefficient than traditional zinc coatings, which means it withstands stamping and bending with less wear. This makes it easier to process without compromising corrosion performance.

Comparing ZAM with Traditional Hot-Dip Galvanizing

Simplified Production: ZAM components can be used directly after fabrication. There's no need for post-processing, re-galvanizing, or extra transportation-saving time and cost.

Longer Lifespan: Neutral salt spray tests confirm that ZAM outperforms standard galvanized coatings.

Extended Warranty Backing: Thanks to its proven durability, ZAM often comes with 30-year warranties, meeting and exceeding the solar industry's 25-year service life requirement.

A Material Used Across Industries

ZAM isn't limited to solar mounting systems. Its balanced properties-excellent corrosion resistance, good paint adhesion, weldability, and abrasion resistance-have made it a preferred material in automotive manufacturing, agricultural buildings, railways, and airport infrastructure.

Designed for Long-Term Performance

At Wanhos, we use zinc-aluminum-magnesium coatings because they help deliver mounting systems that are durable, easy to install, and require minimal maintenance. It's a material that matches the long-term vision of solar energy.

Interested in upgrading to ZAM-based solar mounting systems?
Reach out to learn how our products can bring reliability and value to your next project.