Buyer Documents & Technical Guides

Buyer checklist for faster quotation: BOM details, destination, trade terms, technical requirements, packing, lead time, and QC requests.

How OmniSol screens suppliers before quotation, sampling, order confirmation, production, inspection, and shipment.

7-point evaluation framework: factory access, QC capability, engineering support, MOQ flexibility, and red flags.

Comparison of factories, trading companies, and sourcing agents across pricing, MOQ, accountability, and QC.

Production lead times by category, MOQ notes, 20ft vs 40ft HQ specs, mixed-container consolidation, and order timeline.

Ex-works price ranges, material cost components, freight estimates, import duty, and landed cost calculation.

EXW, FOB, CIF, DAP and DDP comparison for importing solar BOS components from China.

4-stage QC workflow: factory audit, in-process check, pre-shipment inspection, and container loading supervision.

Incoterms guide, transit times by destination, export documentation checklist, and shipment coordination notes.

Pre-shipment QC checklist for PV cables, connectors, protection devices, combiner boxes and mixed BOS orders.

Carton labels, pallet labels, private labels, SKU separation and mixed-container loading control.

Post-shipment claim workflow, evidence checklist, supplier escalation, and resolution options for solar BOS procurement.

H1Z2Z2-K cable cross-section table, voltage drop formula, MC4 connector ratings, and PV junction box notes.

4mm2 vs 6mm2 vs 10mm2 PV cable selection, DC voltage drop formula, worked examples, and RFQ checklist.

Cross-mating risks, 1000V vs 1500V connector selection, T-branch, diode, fuse connector notes, and RFQ checklist.

How to select solar DC MCBs, MCCBs, SPDs, fuses, isolators, rapid shutdown devices, and combiner boxes.

2-in, 4-in, 12-in and 1500V combiner box selection by string count, protection layout, monitoring and enclosure.

MCB, RCBO, RCCB and solar AC-side protection selection for residential and C&I distribution boards.

Modular, plug-in and waterproof distribution board selection by phase type, circuit count, IP rating and layout.

UN38.3, MSDS, dangerous goods packing, labeling and shipping checks for LiFePO4 solar battery orders.

Hybrid inverter sourcing checklist by phase type, battery compatibility, grid standard, monitoring and warranty.

System selection matrix by roof type, tile hooks, standing seam clamps, ballast systems, and installation sequence.

Driven pile, concrete ballast, screw pile, C-steel vs ZnAlMg coating, row spacing, and utility-scale logistics.

Standing seam, Klip-Lok, Kalzip, corrugated and trapezoidal profiles with rail-free vs conventional rail notes.

Universal adjustable vs direct-fit hooks, 3-way adjustment, SUS304 vs SUS316, and no-cut installation notes.

Klip-Lok profile variants, compatible seam clamp selection, rail-free layout, and clamp spacing notes.

Driven pile, screw pile, and concrete ballast comparison with soil suitability, embedment depth, and GCR notes.

Material properties comparison: density, yield strength, corrosion resistance, service life, and application recommendations.

Comparison of AS/NZS 1170, ASCE 7-22, Eurocode EN 1991, and IEC product standards. Structural vs product certification explained.

Step-by-step wind load calculation references for AS/NZS 1170.2, ASCE 7-22, and Eurocode comparison.

HDG, ZM275, and anodized aluminum comparison with ISO 9223 environment categories and coating selection notes.

Tilt calculation notes, seasonal adjustment, self-cleaning minimums, E/W split rooftop analysis, and city references.

Cyclone, heavy snow, high wind, desert thermal expansion, and seismic zone design requirement notes.