Answers · Sourcing
How to Verify a Lithium Battery Factory in China
Direct answer
Verify a Chinese battery factory by matching its ISO 9001 and UN38.3 certificates to the exact business license name, running a live video tour of the SMT and aging lines, ordering a third-party inspection (~$300-500), pulling its customs export records, and testing a pre-production sample. Genuine 48V 100Ah rack factories quote FOB $620-780; anything far below that is usually a trader.
1. Match the certificates to the business license
Ask for three documents and confirm the company name is identical on all of them:
- Business license with the 统一社会信用代码 (Unified Social Credit Code).
- ISO 9001 certificate issued within the last 12 months.
- UN38.3 test report for the exact cell/model you plan to buy.
Cross-check the license number on the provincial SAMR (State Administration for Market Regulation) portal. If the certificate name differs from the license name, you are dealing with a reseller, not the factory.
2. Run a live video tour, not a recorded one
A pre-recorded "factory video" proves nothing. Book a live WeChat or Zoom call and ask the supplier to walk the floor:
- SMT and cell-welding machines.
- Battery aging (formation) racks . a real factory has rows of them.
- BMS programming station and the warehouse with your model's cartons.
3. Order a third-party inspection
Before sending a deposit, hire SGS or Bureau Veritas for a factory audit. Cost runs $300-500 for a one-day on-site check that confirms headcount, production lines, and whether the shown equipment is actually in use. This single step filters out most ghost factories.
4. Pull the export record
A factory that has shipped containers for 2+ years leaves a customs trail. Ask your freight forwarder to pull the company's export declarations, or request references from buyers in your region. Luchu Energy has shipped LiFePO4 systems to Nigeria, Germany, and the Philippines since 2019.
5. Test a pre-production sample
Order 1-2 units and run a capacity test at 0.2C discharge. A 48V 100Ah rack should deliver 5.0-5.12 kWh; a unit that falls under 4.8 kWh indicates inflated rating or B-grade cells. Pair the sample with the grade-A vs grade-B cell checklist before scaling the order.
What a real factory charges
Use price as a sanity check. Current FOB from verified Chinese factories:
- 48V 100Ah rack: $620-780
- 51.2V 100Ah wall-mounted: $560-720
- 5kWh all-in-one: $680-920
Quotes 30% below these numbers almost always mean A- or B-grade cells relabeled as new. See the full 2026 LiFePO4 price guide for every model.
Frequently asked questions
What documents prove a Chinese battery factory is real?
Request the business license (统一社会信用代码), a recent ISO 9001 certificate with the exact company name, and UN38.3 test reports issued to that entity. Cross-check the license number on the provincial SAMR portal. A genuine factory ships 48V 100Ah rack units at FOB $620-780; quotes far below that usually come from traders reselling A- or B-grade cells.
Is a video factory tour enough to verify a supplier?
No. A live video call showing the SMT line, cell welding, and aging racks is a good start, but pair it with a third-party inspection (SGS or Bureau Veritas, about $300-500) and a customs record pull of the company's export history before committing a deposit.
Need a supplier that passes all five checks?
Luchu Energy is a verified LiFePO4 manufacturer with UN38.3, CE, and IEC 62619 certifications. Request a factory pack and FOB quote →