Factory & Quality — Baoding Manufacturing Base

1. Production entity vs export entity

Manufactured by our production entity Dongliang at the Baoding facility; exported by Baoding Donglan New Energy Co., Ltd.

Two companies appear in a DLXN transaction, and buyers are right to ask why. The plant that physically builds the modules and battery cabinets is operated by Dongliang, our production entity. The company that signs the export contract, issues the documents and carries the warranty is Baoding Donglan New Energy Co., Ltd. — 保定东岚新能源有限公司. Both are managed by the same team on the same site, and both operate under one quality management system, but they are separate legal persons with separate registrations.

In practice this means a buyer searching the contract counterparty finds Donglan, while a buyer visiting the factory meets Dongliang. Neither name is a trading alias for the other. If your compliance team runs a supplier check, run it on both: ask for the business licence of each, confirm the customs registration number printed on the export documents matches the seller named in the contract, and check that the address on the licence is the address you are auditing.

Why structure it this way? Exporting requires an entity holding the foreign trade operator registration, customs consignor registration and foreign exchange account, while manufacturing sits with the plant that owns the lines, the test equipment and the workforce. Separating the two keeps the manufacturing entity focused on production and the export entity focused on contracts, logistics and after-sales. For the buyer the split changes nothing about who is liable: your contract, your invoice and your warranty all name Baoding Donglan New Energy Co., Ltd., and the factory behind them is the Baoding plant described on this page.

2. Testing flow: cell sorting, assembly, electrical test, ageing

Every battery cabinet follows the same four-stage sequence, and no stage can be skipped by scheduling pressure. The flow below applies to residential wall-mount and floor-standing packs as well as to the GC100/GC120 outdoor cabinets.

1. 1

   Cell sorting

   Incoming LiFePO4 cells are graded before they touch a pack line. Capacity, internal resistance, open-circuit voltage and self-discharge are measured, and cells are binned so that every series string is built from cells of matched capacity and resistance. A pack built from mismatched cells will drift at the top of charge no matter how good the BMS is, so this is the step that determines how the pack behaves in year five. Each cell carries a barcode that is bound to the pack serial number in our production record.

2. 2

   Pack assembly

   Matched cells are stacked into the designed compression fixture, busbars are laser-welded, and voltage-sense and temperature harnesses are routed and secured. Torque on every mechanical joint is set with a calibrated tool, and the BMS is mounted and its harness continuity checked before the pack goes to the test bench.

3. 3

   Capacity, insulation and communication test

   Each pack and each finished cabinet runs a full charge/discharge cycle to record real capacity against nameplate. Insulation resistance and dielectric withstand tests confirm the isolation between the high-voltage circuit and the enclosure. Communication is tested against the inverter protocols that will be used in the field — CAN and RS485 — including the alarm and protection frames, not only the normal operating frames.

4. 4

   Ageing

   Finished units go onto an ageing rack where they complete charge and discharge cycles under load and then rest while cell voltages are logged. A pack that is going to reveal a weak cell or a BMS fault usually does so here rather than in the customer’s plant room. Ageing data is stored against the serial number, which is what our after-sales team reads when a unit is reported years later.

Inside the Baoding plant

3. Packaging and compliance: UN3480, crates and marking

Lithium battery cabinets and packs ship as UN3480, class 9 dangerous goods. Each shipment is prepared with a UN38.3 test summary, an MSDS, and a dangerous goods declaration completed by a trained shipper; cells and packs are transported at a state of charge of 30% or less, which is the condition under which the UN38.3 test data and the air and sea freight rules apply. Cabinets are braced inside the crate so that the pack cannot move against the busbars, and terminals are covered before the enclosure is closed.

Solar modules travel in a different packing logic. Modules are stacked in reinforced cartons on ISPM 15 heat-treated pallets, corner-protected, strapped, and wrapped with a moisture barrier for sea freight. A pallet is loaded so that the frame edges take the load, never the glass. Glass-on-glass and bifacial products get additional edge protection because a hairline crack at the edge is invisible at loading and expensive at destination.

Crating is not cosmetic. Battery cabinets are heavy and top-heavy, so the crate base is dimensioned for the cabinet’s centre of gravity and fitted with skids that allow a forklift to move it without tilting. Crates are reinforced with steel strapping, closed with screws rather than staples so that customs can open and reseal them without damaging the panel, and marked with handling symbols, gross and net weight, dimensions and the UN number. Shock and tilt indicators are applied to the outside of the crate so that both parties can see whether the unit was dropped or laid on its side in transit.

Marking covers the product as well as the box. Every cabinet carries a nameplate with model, serial number, nominal voltage, capacity and manufacturing date, the CE mark where the CE declaration applies, and the standard references used for the battery — IEC 62619 for safety of industrial lithium cells and batteries, UN38.3 for transport, and GB/T 36276 for the stationary application. Modules carry IEC 61215 and IEC 61730 references, the electrical ratings at STC and the serial number that ties the module to its flash-test data. Certification packs, test reports and declarations are issued with the shipping documents so that the importer is not left chasing paperwork after the container has sailed.

Packing, marking and loading (photos being updated)

4. Shipping record by region

The table below lists the regions DLXN ships to on a recurring basis, what typically moves in each direction and how the cargo is normally routed. We do not publish customer names or shipment volumes: those figures are commercially sensitive and, without an auditable source, any number we printed here would be a claim rather than a record. Buyers who need references for their own market can ask for a redacted bill of lading and a customer contact under NDA.

Consolidated shipments from several product lines are loaded at the Baoding plant and trucked to Xingang (Tianjin) or Qingdao for ocean freight. Loading is photographed bay by bay, and the photo set is sent with the shipping documents so that the importer can compare the container condition at destination against the condition at origin.

5. After-sales: warranty, spare parts and remote diagnostics

Battery storage carries a five-year product warranty, with an extended term available on request; solar modules carry a 12-year product warranty and a 25-year linear output warranty. The warranty is issued by Baoding Donglan New Energy Co., Ltd., and the serial number on the nameplate is the key to the claim: it links the unit to its cell batch, its test records and its ageing data. A claim starts with that serial number, not with a description of the fault.

Spare parts are held in Baoding for the models we ship: BMS boards, contactors, fans, communication modules, door seals and replacement packs. The practical question for a buyer is not whether spares exist but how fast they arrive, so we quote the spare-parts list with the original order for projects that cannot tolerate a long outage, and we ship small parts by air courier rather than waiting for the next container.

Remote diagnostics run through DLXN-IOT. Cabinets and hybrid systems that are connected report state of charge, state of health, cell voltage spread, temperature, alarm history and fault codes against the same serial number that appears on the nameplate. When a unit reports an alarm, our engineers read the event log remotely before deciding whether the fix is a firmware setting, a part, or a site visit — which avoids shipping a technician to site to diagnose something the log already shows. The monitoring portal is documented separately, and access can be given to the installer or the end customer.

What we do not do is promise a service level we cannot staff. Response times, spare-part lead times and on-site support are agreed per project in the contract, and for markets where we have no service partner we say so before the order rather than after the failure.

Frequently asked questions