Independent battery pack sourcing & QC for European buyers

We find real Chinese factories, audit them with evidence, and control quality through to delivery — for balcony storage, home ESS, solar PV, e-bike, RV and marine battery packs. Paid by you only. Never by factories.

Get a free factory assessment See how we work

Buyer-paid, no factory commissions
Photo & video-backed audits
EU compliance ready

Real factory floor — battery pack assembly line with operators at work — Real factory floor — pack assembly line we audit on site

Truly independent

Paid by clients only — service fees and agreed commission from you. Nothing from factories, so our recommendations stay yours.

Audits with evidence

Every audit report is backed by photos, video and verified documents — not a thumbs-up over the phone.

End-to-end control

From factory shortlist and sampling to in-line QC, final inspection and shipping — one accountable partner.

EU compliance ready

UN38.3, IEC 62619, CE and EU Battery Regulation support — including battery passport preparation for 2027.

Why buyers work with us

The gap between a brochure and a shipment

Five things go wrong when buyers source battery packs without someone on the ground. Here is how we stop each one — and why we can be trusted to: we are paid by you, never by factories.

01You cannot be in the factory every week

We are. Weekly on-site follow-up with photo and video status reports from the line.

02Brokers serve whoever pays them

We are paid by buyers only — service fee plus agreed commission from you. We accept nothing from factories. No rebates, no finder's fees.

03Samples pass, 500-unit production fails

We audit the line and inspect the order — not just the sample. In-line checks and final AQL inspection on your actual units.

04Certificates exist but do not match the product

We verify documents at the source and against the actual cells and packs — UN38.3, IEC 62619, CE, in date and in scope.

05EU compliance dates keep moving

We track the battery passport and due-diligence deadlines and check factory readiness before it becomes your problem.

Focus categories

Where we work

Five battery-pack categories we know inside out — the factories, the failure modes and the compliance that applies.

Balcony Storage

Plug-and-play, Balkonkraftwerk-ready

Home ESS

Solar-plus-storage for households

Solar PV

PV battery systems & storage

e-Bike & e-Trike

Light EV packs, high volumes

RV & Marine

Durable packs for mobile living

Factory floor evidence

What we actually see when we audit

Photos and video from our on-site work — the equipment, the checks and the packaging your order will rely on. Raw files go into every audit report.

Laser welding station — automated cell-to-module joining

Weld inspection — busbar joints checked at the line

Module internals — cell interconnects and wiring check

UN3480 dangerous-goods crate, labelled for shipment

UN38.3 packing — dangerous-goods crate, labelled for shipment

Finished-goods warehouse — packed orders ready to ship

Control cabinet wiring — termination quality under review

High-voltage harness — internal assembly QC

Dangerous-goods storage — segregation and handling

How it works

One accountable process, five steps

You always know where your order stands — because we stand between you and the factory.

01

Requirements

Tell us your product, volumes and target markets. We map specs, budget and compliance needs.

02

Shortlist

We screen candidate factories against your real requirements — not against their brochures.

03

Audit & sampling

On-site verification of capacity, certificates, quality systems and samples, with photo and video evidence.

04

Follow-up & QC

Production tracking, in-line checks and regular status reports until your order is ready.

05

Inspection & shipping

Final AQL-based inspection, documented findings, and coordination through to shipment.

Why independence matters

"Independent" is a process, not a slogan

Anyone can say they work for the buyer. We built a practice that has to prove it.

Published selection criteria

How we shortlist and score factories is open — you can audit our method.

Reports you can review

Raw audit files, photos and videos are archived for your own verification, not filtered.

Disclosed relationships

Any relationship with a factory is declared. We take no commissions or incentives from suppliers.

Our shortlists and audit findings answer to the buyer, not the supplier.

Compliance spotlight

The EU battery timeline is moving — we track it for you

Regulation (EU) 2023/1542 is changing what your supplier must prove. Here are the dates that matter.

Feb 2024

General applicationof the EU Battery Regulation begins — the framework that now governs batteries sold in Europe.

Aug 2025

First waste-management obligationsapply for battery producers and importers.

Feb 2027

Battery passport becomes mandatoryfor LMT, industrial (>2 kWh) and EV batteries — data your factory must be able to supply.

Aug 2027

Due-diligence obligationsstart for supply chains — cobalt, lithium, nickel and graphite tracing included.

See our compliance service

Sourcing battery packs from China?

Get an honest read on factories and risks before you spend a dollar. A free assessment of your sourcing project — no obligation.

Start the conversation

Services

What we do for you

Four services that map to the full sourcing lifecycle. Take one, or take the whole chain — most buyers start with an audit and stay for the QC.

Factory Audit

We verify what a factory actually is — on site, with evidence.

What we check

Legal entity and real ownership (factory vs. trading desk)
Certifications: ISO 9001, IATF 16949, and product certs
Real capacity this quarter vs. brochure claims
Production lines, equipment and maintenance state
Testing lab, test records and sampling process
BOM traceability and cell sourcing

Deliverable

Photo/video-backed audit report with findings and risk ratings.

Engagement: one-off audit, or bundled into a sourcing project.

Quality Control & Inspection

Quality checked at the moments that matter — before it ships.

What we do

IQC on incoming cells, BMS and components
In-line process checks during production (IPQC)
Final inspection to AQL sampling plans
Defect classification with photo evidence
Clear pass / fail decisions, not opinions

Deliverable

Inspection reports with photos, defect counts and your release decision.

Engagement: per-order inspections, or scheduled across your production.

Order Follow-up & Supplier Management

Someone in the factory's time zone, watching your order.

What we do

PO review against agreed specs and pricing
Production schedule tracking and milestone checks
Weekly status reports with photos from the line
Issue escalation and rework verification
Shipping coordination and documentation

Deliverable

Weekly status reports from the factory floor.

Engagement: monthly retainer while your orders run.

Compliance Consulting

Turn EU regulation into a checklist your supplier can meet.

What we cover

UN38.3 transport testing and documentation
IEC 62619 and CE marking requirements
EU Battery Regulation: carbon footprint, due diligence, battery passport
Supplier readiness assessments ahead of 2027

Deliverable

Compliance gap assessment with a practical action list.

Engagement: advisory, per project or on retainer.

Industries

Five categories, one standard of evidence

Each category has its own failure modes and compliance. We audit against the category, not a generic template.

Product landscape

The pack categories factories actually make

Four application domains cover nearly every Chinese pack factory. We audit against the domain that matches your product — and your category often spans more than one.

Mobility & power packs

Passenger & commercial EV packs; light mobility and low-speed vehicles.

e-Bike / e-Trike (focus)Passenger EVCommercial EVLow-speed vehicle

Energy storage packs

Grid-scale, C&I, and residential & backup storage.

Balcony storage (focus)Home ESS (focus)Grid / utilityC&I storageTelecom / UPS backup

Consumer & portable packs

3C devices, personal care & health, in-car electronics.

Smartphones / laptopsWearablesIn-car electronics

Industrial & specialty packs

Industrial logistics, and high-spec niche applications.

RV & marine (focus)Forklifts / AGVDronesRail transit

Battery module assembly — pack internals we inspect on site

Balcony Storage

The fastest-growing segment in European households. Plug-and-play, grid-tied and safety-critical — a bad pack ends up on a balcony next to people.

Plug-and-play safety: connectors, micro-inverter pairing, IP ratings
Balkonkraftwerk / balcony-PV compatibility and documentation
Cell balancing, BMS behaviour and cycle-life claims verification

Battery pack production line — modules under assembly

Home Energy Storage (ESS)

Solar-plus-storage for households: higher capacity, deeper discharge and longer warranties — where build quality directly hits your brand.

Module welding and assembly quality on high-capacity packs
BMS / inverter communication, SOC accuracy and balancing
Thermal design, casing and fire-safety documentation

Solar PV & Storage Systems

Battery systems paired with PV arrays — from rooftop to balcony. Compliance and data traceability are becoming the deciding factors in Europe.

PV-battery system integration and communication protocols
Carbon-footprint data trail readiness (EU Battery Regulation)
Battery passport data availability from the factory

Production line — storage units in assembly

Prismatic cell array — cell sourcing and traceability check

e-Bike & e-Trike

High-volume, price-sensitive packs for light electric vehicles. Consistency across large orders is the real challenge — we check it order after order.

Cell sourcing and UN38.3 test traceability
Waterproofing, vibration and connector quality
In-line and final inspection consistency at volume

RV & Marine

Mobile living and boats demand packs that survive vibration, temperature swings and salt air — with safety standards that vary by region.

Vibration, shock and ingress protection verification
Charge/discharge behaviour under real load profiles
Certification and documentation for the destination market

Internal wiring and connectors — build quality inspection

Compliance

The standards behind every pack we sign off

Compliance is not paperwork — it is what keeps your product on the shelf and off the liability list. We verify it at the factory, with evidence.

UN38.3

UN transport testing for lithium cells and packs — required for every air and sea shipment. We verify the test reports match the actual cells used.

IEC 62619 / UL 1973

Safety standards for industrial and stationary batteries. We check certification scope, validity and whether the certified product matches what ships.

CE Marking

Essential for selling in the EEA. We check the technical file, declarations and that the factory can actually support them.

EU Battery Regulation 2023/1542

Carbon footprint declarations, due diligence and the battery passport. The new layer of proof every importer will need.

Timeline

What changes, and when

Feb 2024

General application — Regulation (EU) 2023/1542 starts governing batteries in the EU market.

Aug 2025

First waste-management obligations apply for producers and importers.

2026 onward

Carbon-footprint declarations roll out — EV first, then industrial batteries over 2 kWh, per Commission methodology.

Feb 2027

Battery passport mandatory for LMT, industrial (>2 kWh) and EV batteries.

Aug 2027

Due-diligence obligations begin — responsible sourcing of cobalt, lithium, nickel and graphite.

Dates per Regulation (EU) 2023/1542 (EUR-Lex) and European Commission guidance, verified October 2026. Requirements can shift with delegated acts — we track updates for active clients.

How we help

From gap to green light

01

Gap assessment

We compare your product and supplier against the standards that apply to your markets.

02

Factory verification

We verify certificates, test reports and data trails at the source — the documents exist or they don't.

03

Action list

You get a prioritised list: what to fix, who fixes it, and what evidence proves it.

About

A practice built on one problem

European buyers can't fly to every factory. Trade shows, samples and sales calls don't tell you what happens at 2 a.m. on the production line. We close that gap with evidence.

What we are

An independent sourcing and QC practice in Guangzhou, China, serving European importers, brands and distributors. We are not a trading desk with a logo — we are the verification layer between you and the factory.

Factory audits with photo and video evidence
Quality control across the order lifecycle
Order follow-up in the factory's time zone
EU compliance verification and preparation

How we are paid

Simple and public: service fees plus agreed commission, both from you — the client. We accept nothing from factories. No rebates, no finder's fees, no "gifts" that quietly decide your shortlist.

That is the whole point of the practice. If a factory ever influenced our recommendation, the business stops working — for you and for us.

What we will not do

We won't pass a factory we haven't verified
We won't whitewash an audit finding to close a deal
We won't take a position on a product we haven't inspected
We won't take commissions, rebates or incentives from suppliers

Where we are

Guangzhou, China — at the centre of the battery pack supply chain, close enough to audit in person and follow up weekly.

Serving European markets: Germany, the Netherlands, the Nordics, France, Italy and beyond.

batterypacksourcing.com · info@batterypacksourcing.com

Registered entity

A real company, on record in China

Every engagement runs through a registered legal entity — verifiable on China's public company registry (gsxt.gov.cn), not a trading desk with a logo.

Registered name: Guangzhou Yunchuang Consulting Co., Ltd. (广州云创咨询顾问有限公司)
Unified Social Credit Code: 91440111MAG0R58X6F
Company type: Limited liability company (natural-person investment)
Registered capital: RMB 1,000,000
Established: 22 October 2025
Address: Room 4047, 602 & 604, No. 70 Xingshan Middle Road, Baiyun District, Guangzhou, China
Business scope: Business services (per the National Enterprise Credit Information Publicity System)

Business license of Guangzhou Yunchuang Consulting Co., Ltd. — watermarked for website display — Registered with the Guangzhou Baiyun District Administration for Market Regulation. Watermarked for website display; buyers can verify the code at gsxt.gov.cn.

What you can hold us to

Accountability is the product

Small practice, high standard. These are not slogans — they are how every engagement runs.

Reply within one business day

In your time zone — not a week later.

Weekly photo status reports

From the line, while your order runs.

Raw evidence archived

Audit files, photos and videos you can review yourself — nothing filtered.

Decisions, not opinions

Pass / fail backed by documented findings you can verify.

From the factory floor

Watch a visit

Short, unedited clips from our audits and follow-ups — the same footage that goes into your reports.

Production line — operator inspecting a storage unit

Production line — operator check

Testing and aging — five-layer power test cabinets

Testing & aging — power cabinets on the QC bench

Insights

What we see at the factory floor

Practical notes from audits, inspections and the compliance calendar. Tap a title to read.

What a factory audit actually verifies

4 min read · Audit basics

Paperwork travels well; production lines don't lie. A real audit verifies:

Who owns the factory — the legal entity, not the business card
Whether certificates are in date, in scope and match the actual product
Real capacity this quarter, measured on the line — not brochure capacity
Testing equipment that exists, is calibrated, and has records
Which cells go into the pack, and whether the UN38.3 test covers them
Whether the BOM is traceable from cell to finished pack

If a factory can't show you these, everything else is marketing.

EU battery passport: what it means for your supplier

3 min read · Compliance

The battery passport becomes mandatory on 18 February 2027 for LMT, industrial (>2 kWh) and EV batteries, and due-diligence obligations follow on 18 August 2027. If your supplier cannot show you the data trail today, they won't be ready by then.

Who performed the UN38.3 test — your cell or a borrowed one?
Is the BOM fully traceable from cell to pack?
Can they produce the carbon-footprint data the passport requires?

These three questions alone will separate prepared factories from the rest.

5 questions to ask before sourcing battery packs from China

3 min read · Buyer checklist

Who actually owns the factory — or is it a trading desk?
Is UN38.3 tested on your cell, or someone else's?
What is real capacity this quarter, not brochure capacity?
Is the BOM traceable from cell to finished pack?
Who pays when 500 units fail at final inspection?

We audit answers 1–5 on site. Buyers pay us; factories don't.

Balcony storage sourcing checklist for 2026–2027

5 min read · Category guide

Balcony storage is the fastest-growing segment in European households — and the most safety-exposed. Before you commit to a supplier:

Plug-and-play safety: connectors, micro-inverter pairing, IP rating
Balkonkraftwerk compatibility and local documentation
Cell quality and BMS behaviour under real household load profiles
Battery passport data readiness for 2027
Capacity claims vs. measured discharge tests on actual samples

Samples that pass a lab test can still fail in 500-unit production. That is why we audit the line, not just the sample.

Contact

Start with an honest assessment

Tell us what you plan to source. We'll come back with a straight read on factories, risks and the fastest path — free and without obligation.

Email

info@batterypacksourcing.com

zhaogold4@gmail.com (backup)

Based in

Guangzhou, China · serving European markets

Response time

Within one business day, your time zone

Website

batterypacksourcing.com