Supplier verification
A Video Factory Tour Is Not a Factory Audit
Why a supplier-directed video tour is a first filter, not an audit — and the three evidence points that prove a factory is real, capable and QC-ready for your model.
Insights
Make better questions part of the process.
Practical notes on supplier evidence, photovoltaic and energy-storage sourcing, RFQs and procurement risk.
4 min read
Payment risk and buyer protection
A Deposit Is Not the Risk 鈥?an Unverified Supplier Is
What makes a deposit defensible, how to tie payment releases to documents instead of dates, and when escrow or an L/C actually fit a China sourcing order.
Supplier qualification
How to Verify an ISO 9001 Certificate Before Shortlisting a Supplier
A seven-field buyer check for matching an ISO 9001 certificate to the exact legal entity, factory site and activity in a supplier quotation.
Quality inspection
AQL Sampling: What a Pass Really Means for Buyers
Why an AQL result is a probabilistic lot decision鈥攏ot a defect percentage or proof that every uninspected unit conforms.
PV module sourcing
PV Module Flash Lists: Reconcile Every Watt to a Serial Number
A buyer-side workflow for linking factory flash-test data to the exact model, serial numbers, pallets and measurement records in a PV shipment.
EU product compliance
CE Marking: 8 Evidence Checks Before an EU-Bound Order
A buyer-side evidence trail for matching CE marking, the Declaration of Conformity, technical evidence and economic-operator responsibilities to the exact product.
Coastal solar and ESS
Why IP65 Does Not Prove Coastal Durability
Separate enclosure ingress protection from salt-mist corrosion, temperature, UV, installation and warranty evidence for coastal solar and storage equipment.
Inverter system expansion
鈥楶arallel-Ready鈥?Is Not an Expansion Approval
A buyer-side compatibility file for staged inverter and inverter-charger expansion, covering exact hardware, firmware, topology, wiring and battery limits.
Supplier change control
Stop Silent Component Substitutions with a Written Approval Gate
A six-field buyer-controlled change request for critical components and materials in certified electrical products and mass production.
Container shipping evidence
SOLAS VGM: What It Proves鈥攁nd What It Does Not
A buyer-side guide to verified gross mass, the named shipper, weighing method and the cargo-control records that VGM does not replace.
Trade finance and inspection
A Letter of Credit Does Not Inspect the Goods
Connect the sales contract, physical inspection and documentary-credit requirements without assuming a complying presentation proves product quality.
PV project acceptance
Before Final Payment: 8 PV Commissioning Handover Records Buyers Should Require
Connect scope, as-built records, test results, exceptions and operating access before accepting a grid-connected PV system.
Lithium battery shipping
Before Booking Lithium Battery Cargo: 8 Checks Beyond the UN 38.3 Test Summary
Separate transport-design traceability from shipment classification, packaging, booking and cargo-release evidence.
PV module sourcing
A PV Module Certificate Is Not a Batch Release: 7 Evidence Checks Before Shipment
Connect design evidence, manufacturing controls and order-specific lot records before authorizing shipment.
Residential off-grid solar
Before You Request an Off-Grid Solar Quote: 12 Inputs That Define the System
A buyer-side framework for aligning loads, autonomy, charging sources, PV constraints and acceptance evidence before comparing quotations.
Solar + storage sourcing
7 Evidence Checks Before Buying a Hybrid Inverter and Battery System from China
A model-specific verification framework for compatibility, compliance evidence, factory controls and battery shipping.
Supplier due diligence
How to Evaluate a Chinese PV Supplier Before You Order
A practical framework for reviewing capacity, documentation, quality systems and commercial reliability claims.
Energy storage
What to Include in a Battery Container RFQ
The technical and commercial details buyers should define before requesting BESS quotations.
Procurement
Incoterms for Solar Imports: A Buyer鈥檚 Guide
EXW, FOB, CIF and DDP considerations for overseas solar procurement teams.