USA Market
Solar Mounting Systems
for the United States
L-foot rail systems for asphalt shingle, seam clamps for standing seam, and flat-roof ballast — with ASCE 7 load calculations, UL 2703 product options, and transparent Section 301 tariff guidance.
Sourcing Solar Mounting for the US Market
The United States is the world's largest solar market by installed capacity, with California, Texas, and Florida leading residential and utility-scale deployment. The US market has two characteristics that distinguish it from European and Australian sourcing: the dominance of asphalt shingle roofing (which requires an L-foot penetrating mount rather than non-penetrating clamps), and Section 301 tariffs that add a 25% surcharge to most Chinese-made solar mounting hardware.
Despite the tariff impact, factory-direct pricing from China remains competitive for distributors and larger EPCs sourcing container quantities. OmniSol quotes all US pricing on a DDP or FOB basis with the Section 301 tariff explicitly itemized — there are no hidden cost surprises at customs.
US projects also require ASCE 7 wind and snow load calculations and, for California, CBC seismic compliance. OmniSol provides ZIP-code-specific engineering reports as part of the free engineering support package.
Section 301 Tariffs — Transparent Pricing
Most solar mounting hardware imported from China is subject to a 25% Section 301 additional duty on top of the standard MFN rate (~3.7% for aluminum structures, HS 7610.90). OmniSol itemizes this clearly in every US quotation so you can accurately calculate landed cost, customer pricing, and margin. We do not pad factory prices to obscure the tariff impact.
US Roof Types & Compatible Mounting Systems
Asphalt shingles dominate US residential roofing. Standing seam metal is growing in the Sun Belt. Commercial rooftops are predominantly low-slope membrane systems.
Asphalt Shingles (Composition)
~65% of US residential
L-foot + aluminum rail system
Stainless lag screws, EPDM-sealed penetration
Standing Seam Metal
Growing — Sun Belt, rural West
OS-KL series seam clamps (non-penetrating)
No roof penetration; Snap-Lok, Klip-Lok compatible
Flat / Low-Slope (TPO / EPDM)
Commercial/industrial dominant
Ballast tray, carbon steel Q235B HDG
Non-penetrating; 5°–15° tilt; ASCE 7 uplift check
Clay / Concrete Tile
SW states — CA, AZ, NV, FL
OS-TH-01 adjustable hook
No tile cutting; 3-way adjustment
State-Specific Requirements
US solar installation codes vary significantly by state and jurisdiction. Key considerations by major solar market:
California
Title 24 energy code; NEM 3.0 for net metering; CBC structural; seismic zone SDC D/E in much of the state — seismic load calculation may be required.
Texas
Minimal statewide code — local jurisdiction varies. ASCE 7-22 wind is primary load. Coastal counties (hurricane exposure) require higher design wind speeds (up to 150+ mph).
Florida
High Velocity Hurricane Zone (HVHZ) in Miami-Dade and Broward requires NOA (Notice of Acceptance) or FBC product approval. Product and installation documentation requirements are the most stringent in the US.
Northeast (NY, MA, NJ)
Significant snow load requirements. ASCE 7 ground snow load map — OmniSol includes snow load check in engineering reports for these regions.
US Standards & Compliance
UL 2703
Mounting systems for PV — structural + electrical bonding/grounding
Listed products available on request
ASCE 7-22
Wind and snow load design standard — referenced by IBC and CBC
ZIP-code load reports included
NEC Article 690
Electrical safety for PV systems — rail bonding and grounding
UL 2703 compliance covers this
IBC (International Building Code)
Structural design basis for most states
Engineering documentation provided
Florida FBC / Miami-Dade NOA
HVHZ product approval for hurricane zone counties
Consult OmniSol for HVHZ projects
California CBC + Title 24
Energy and structural code for CA projects
CA-specific engineering reports available
Shipping to the United States
Xiamen → US West / Gulf / East Coast ports
- West Coast: LA/Long Beach (POLB) — ~16–20 days from Xiamen
- Gulf Coast: Houston — ~25–28 days
- East Coast: Savannah, NY/NJ — ~28–32 days
- FCL 40HQ and LCL consolidation available
- Incoterms: FOB Xiamen, CIF, or DDP (tariff included)
- Commercial invoice and packing list
- Bill of lading (OBL or telex release)
- HTSUS classification and Section 301 duty itemized
- Material certifications (alloy grade, coating weight)
- ASCE 7-22 engineering report for project ZIP code
- UL 2703 test reports (for listed products)
Frequently Asked Questions
Are OmniSol products UL 2703 listed?
OmniSol supplies products to UL 2703 specification and can source UL 2703 listed mounting systems from partner factories. UL 2703 covers both the structural and electrical bonding requirements for PV racking. For AHJ (Authority Having Jurisdiction) submissions that require UL listing, OmniSol will identify the correct listed products at the quoting stage.
How do Section 301 tariffs affect the cost of solar mounting from China?
Section 301 tariffs currently impose a 25% additional duty on most solar mounting hardware imported from China (aluminum structures HS 7610.90, steel structures HS 7308.90). This is a significant landed-cost factor. OmniSol provides detailed HS code classification for each product, and the delivered price we quote is transparent about the tariff impact. Buyers should factor this into their total cost of ownership calculation when comparing domestic vs. import supply.
What mounting system works best for asphalt shingle roofs in the US?
Asphalt shingle (composition shingle) roofing — the dominant residential roof type in the US — uses an L-foot (also called an L-bracket or stanchion) anchored through the shingle into the rafter, with a rail system spanning between feet. OmniSol's aluminum rail system with stainless steel lag screws and EPDM-sealed L-feet is a direct fit for this application. Rail spacing is calculated per ASCE 7 wind speed map and local ground snow load for the installation ZIP code.
What documentation does OmniSol provide for US AHJ permit submissions?
OmniSol provides: product technical datasheets with imperial unit specs, ASCE 7-22 wind/snow load calculations for the project location (based on ZIP code), installation instructions with torque specifications, and material certifications. For California projects, calculations reference CBC Chapter 23 and ASCE 7. For Florida HVHZ (High Velocity Hurricane Zone) projects, additional engineering review may be required.
What are typical lead times for solar mounting shipments to the US?
Production lead time is typically 15–25 working days. Ocean freight from Xiamen to the Port of Los Angeles/Long Beach is approximately 16–20 days; to Houston or Savannah, approximately 25–30 days. Total origin-to-port time from order confirmation is typically 6–8 weeks. Expedited air freight is available for small urgent orders at significant cost premium.
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Need project-specific engineering support?
Free CAD layout, wind/snow load calculations, and BOM — included with every order.
Get a Quote for Your US Project
Send us your roof type, system size, and state/ZIP code. We'll provide ASCE 7 load calculations, landed-cost breakdown including Section 301, and product recommendations within 24 hours.
Request US Quote