How to Verify a Solar Panel Factory in China Before You Sign
A staged checklist for EPCs and developers: IEC 61215 and 61730, EL imaging, flash-test binning, insured warranty and what Tier-1 status really proves.
How Many Solar Panels Fit in a 40HQ Container: 2026 Batch Sizing Guide
How many solar panels fit in a 40ft High Cube? ~620–720 large-format modules (18–20 pallets). The formula, kW per container, and why '500 panels' misleads.
VAT and Duty on Solar Panels, Inverters and Storage: What You Actually Pay at Customs
What you actually pay at customs on panels, inverters and storage: how HS codes drive duty and VAT, and when energy-equipment relief applies in Ukraine.
N-type vs P-type Solar Panels: TOPCon, HJT or XBC for Your Project
Efficiency, degradation and temperature coefficient compared for EPCs and developers — and how to choose between TOPCon, HJT and XBC at container scale.
Tier 1 Solar Panel Manufacturers List: What It Really Means and How to Use It
What the BloombergNEF Tier 1 list actually measures — bankability, not quality. Who is on it, and why a Tier 2 factory can still be an excellent supplier.
Import Solar Panels From China: A B2B Buyer's Guide for EPCs and Developers
Buying PV modules factory-direct by the container: real Tier-1 versus relabelled Tier-2, TOPCon versus PERC, price-per-watt logic and IEC certification checks.
HS Codes for Steel Import from China: Get the Classification Right
The HS code sets your duty rate, VAT base and whether anti-dumping or quota measures apply. A reference to Chapter 72–73 codes for coil, pipe and structures.
How Much Steel Fits in a Container: 20ft vs 40ft Payload Guide
Steel is weight-limited, not volume-limited. Payload limits for 20ft and 40ft, the formula for piece counts, and why a 20ft often carries more than a 40ft.
Import Steel from China vs Turkey vs Europe: Where to Source
An honest comparison for wholesale steel buyers: price per tonne, freight and lead time, MOQ, quality standards and anti-dumping duties. When each origin wins.
Mill Test Certificate (MTC): How to Read and Verify a Steel Certificate from China
What an MTC is, how EN 10204 types 2.1, 2.2, 3.1 and 3.2 differ, why B2B buyers should demand 3.1, and how to read and verify the certificate.
Steel Pipes from China Wholesale: Seamless vs Welded, Standards, QC
Seamless versus welded (ERW, LSAW, SSAW), API 5L and ASTM A106/A53 grades, wall-thickness tolerance, mill test certificates and coatings for container orders.
Stainless Steel 304 vs 316 from China: Difference, Grade Verification and Pricing
How 304 differs from 316, how to avoid being sold 201 as 304, and how to verify the batch composition — for wholesale importers buying by the container.