Buyer guide · OmniSol Global
Solar Mounting Systems:
Types, Standards & How to Choose
Six mounting types, seven compliance standards, two material choices. This guide covers what each means for your project — spec, selection criteria and quality checks.
The Six Main Mounting Types
Each type solves a different installation condition. The roof surface, array size and structural load zone determine which applies before any product selection begins.
Tile Roof Hooks
SUS304 / SUS316 stainless
Typical use
Residential pitched roofs (clay, concrete, slate tile)
Standard
AS/NZS 1170, Eurocode EN 1991-1-4
Key note
50+ mold variants for non-standard tile profiles. Match hook to exact tile geometry.
Standing-Seam Clamps
AL6005-T5 anodized
Typical use
Klip-Lok, Kalzip, Lysaght commercial metal roofs
Standard
AS/NZS 1170.2, UL 2703
Key note
Non-penetrating. Seam profile (width, height, geometry) must be confirmed before ordering.
Ground Mounting Frames
Q235B / Q355B HDG steel
Typical use
Utility-scale and commercial ground arrays
Standard
ASCE 7-22, AS/NZS 1170, Eurocode
Key note
Pile-driven or concrete ballast. Tilt angle and row spacing from wind/snow load calculation.
Flat-Roof Ballast Frames
AL6005-T5 or Q235B HDG steel
Typical use
Concrete commercial / industrial rooftops
Standard
AS/NZS 1170.2, Eurocode EN 1991-1-4
Key note
Ballast weight calculated per wind zone. Minimum 10° tilt for self-cleaning.
Solar Carport Structures
AL6005-T5 gutter-integrated
Typical use
Parking canopies, BIPV, EV charging canopies
Standard
Eurocode, AS/NZS, ASCE 7
Key note
Span and column grid from structural calculation. Waterproof gutter system standard.
Balcony & Mini-Rail Kits
AL6005-T5
Typical use
Balcony solar, plug-in PV, small residential
Standard
EN 1991-1-4 (EU)
Key note
Hook or console variants. Supplied as kits with rails, clamps and hardware.
Standards & Certifications by Market
The structural standard varies by installation country. The mounting system must satisfy the local wind and snow load standard — and the supplier must be able to provide the calculation report for sign-off.
| Region | Standard | Status |
|---|---|---|
| Australia / NZ | AS/NZS 1170.1 & 1170.2 | Engineering compliance |
| USA | UL 2703 + ASCE 7-22 | Compliant products available |
| Europe | Eurocode EN 1991-1-4 | Engineering compliance |
| International | IEC 61215 / IEC 61730 | TÜV tested |
| Europe | EN 50618 / IEC 62930 | TÜV certified |
| International | IEC 62852 / UL 6703 | IP68 certified |
| Quality system | ISO 9001:2015 | Certified |
→ For the full wind load calculation workflow, see the Wind Load Calculation Guide.
Aluminum or Galvanized Steel?
The two-sentence rule: roof = aluminum; large ground-mount = steel.
Aluminum AL6005-T5
- 30–40% lighter — reduces roof dead load
- No coating required — corrosion-proof at the surface
- Default for coastal sites (within ~1 km of sea)
- Higher material cost per tonne vs steel
- Best for: residential roof, flat-roof ballast, seam clamp, balcony
Hot-Dip Galvanized Steel
- 15–25% cheaper on material cost
- Longer span without intermediate supports
- Requires ≥85 μm HDG or ZnAlMg coating to spec
- Heavier — ground mount only (not rooftop)
- Best for: utility-scale ground arrays, commercial C&I ground mount
→ Full 8-factor comparison in the Aluminum vs Steel Solar Mounting Guide.
What to Check Before Approving Shipment
Four checks that catch the most common quality failures before loading.
Material certificate
Alloy grade (AL6005-T5 / Q235B) and coating weight (anodizing ≥10 μm; galvanizing ≥85 μm). Reject if the cert references a different grade than quoted.
Wind/snow load report
Confirm the calculation is issued for your actual wind zone and array layout — not a generic "passed UL 2703" statement. Ask for the governing load value and support spacing.
Profile compatibility
For seam clamps and tile hooks: confirm the exact roof profile name and the supplier's matching mold number. A mismatched clamp will not grip correctly under wind uplift.
Pre-shipment QC report
Photos of dimensional checks, coating thickness measurements, and pull-out / torque test results on fasteners. Request before releasing the balance payment.
Related Technical Guides
Wind Load Calculation Guide
Step-by-step: AS/NZS 1170.2, ASCE 7-22 and Eurocode EN 1991-1-4 with worked examples.
Aluminum vs Steel Solar Mounting
8-factor comparison table — installed cost, weight, corrosion, span and recyclability by project type.
Optimal Tilt Angle Guide
40-city reference table: optimal fixed-tilt angle by latitude across AU, EU, USA and Asia.
Metal Roof Clamp Guide
Selecting the right seam clamp for Klip-Lok, Kalzip and trapezoidal roof profiles.
Frequently Asked Questions
What are the main types of solar mounting systems?+
The four main types are: (1) Roof mounting — tile hooks, standing-seam clamps and trapezoidal clamps for pitched roofs; (2) Flat-roof ballast frames for commercial concrete rooftops; (3) Ground mounting — pile-driven or concrete-ballasted C-steel frames for utility and commercial ground arrays; (4) Carport and canopy structures for parking facilities and BIPV applications.
What standards do solar mounting systems need to comply with?+
Standards vary by installation country. Australia and New Zealand require AS/NZS 1170.1 and 1170.2 structural and wind load compliance. The USA requires ASCE 7-22 wind/snow load calculations and UL 2703 for the mounting system itself. Europe requires Eurocode EN 1991-1-4 wind load calculations. IEC 61215 and IEC 61730 govern the panel-to-mounting interface internationally.
Aluminum or galvanized steel — which should I specify?+
Aluminum (AL6005-T5) is 30–40% lighter, naturally corrosion-resistant without coating, and is the default choice for coastal rooftop and residential projects. Hot-dip galvanized or ZnAlMg-coated steel is 15–25% cheaper per tonne on material cost, spans longer without intermediate supports, and is preferred for utility-scale ground mounts and large commercial rooftops where weight is less critical. Use aluminum for rooftops within 1 km of the coast; use HDG steel for inland ground mounts above ~2 MW.
What should I check before approving a solar mounting system from China?+
Four key checks: (1) Material certificate — confirm alloy grade (AL6005-T5 for aluminum, Q235B or Q355B for steel) and coating weight (anodizing ≥10 μm for aluminum; galvanizing ≥85 μm for steel). (2) Wind/snow load calculation — confirm the governing load standard for your country and that the supplier has issued a calculation report for your specific array layout and wind zone. (3) Compatibility — confirm clamp or hook model matches the exact roof profile or panel frame dimension. (4) Pre-shipment QC report — request photos of dimensional checks, coating thickness measurements and pull-out/torque test results on fasteners before releasing the balance payment.
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