About Us
About HNBESS
A battery factory in Hangzhou,
not a catalogue with a warehouse
We design, assemble and test LiFePO4 storage systems from 2.5 kWh wall units to 5 MWh container cabinets. 11,000 m² of workshop, 19 product families, and one team responsible from the drawing to the loading dock.
UN 38.3 · CE · RoHS · ISO 9001
What we build, and what we buy
We assemble packs. Cells come from CATL, EVE and REPT, matched by capacity and internal resistance before they enter a module, and each batch number is written against the pack serial.
We do not make cells. Any factory at this price point that says it does is reselling someone else’s.
What we do own is everything after the cell: module structure, busbar and welding process, BMS configuration and firmware parameters, enclosure and thermal design, and the test record that ships with the unit.
We do
- BMS parameters set to your inverter protocol
- OEM enclosure, nameplate and manual set
- Aging and QC recorded per serial number
- Spare BMS boards held for shipped models
We don’t
- Manufacture cells
- Buy spot-market or grade-B cells
- Resell other factories’ finished cabinets as our own
- Quote a price without a written spec
Twenty years, one product line at a time
Founded in Hangzhou as a lead-acid battery pack workshop
First LiFePO4 pack line, 12 V and 24 V drop-in replacements
Wall-mounted home ESS added; first container shipped to the Gulf
C&I cabinets and high-voltage stackable systems introduced
11,000 m² facility and independent aging laboratory in operation
19 product families, 2.5 kWh to 5 MWh, 120 countries served
Every pack in this catalogue was assembled, aged and tested in one building.
Hangzhou, China · 11,000 m² workshop and test laboratory
Five steps between a cell and a carton
Cell sorting
Capacity and internal resistance matched to within 2%, so one weak cell never drags down a 16-cell string.
Module assembly
Laser-welded busbars. Every terminal torque value is logged against the work order, not estimated by feel.
BMS integration
Firmware set to your inverter protocol on the bench, not left at factory default for you to configure on site.
Aging
Every unit is cycled. We do not sample a batch and ship the rest on the assumption that they behave the same.
Final QC and packing
Insulation, hipot, capacity check, UN 38.3 packing, and photos attached to the serial before the carton is closed.
What our test bench catches
Equipment only matters for what it stops. Each line below is a failure that reaches your customer if nobody checks it.
| Equipment | What it catches before the unit ships |
|---|---|
| Cell sorter (capacity + IR) | Mismatched cells that would show up as capacity loss in year two |
| Charge–discharge cabinets | Weak strings and self-discharge outliers during aging |
| Thermal chamber −20 to +60 °C | BMS cut-off behaviour at Gulf rooftop temperatures |
| Hipot / insulation tester | Leakage paths that fail commissioning, not the factory |
| Vibration table | UN 38.3 T3 transport integrity for modules and racks |
| Drop and crush rig | Packing that survives a Gulf port, not just a Chinese one |
Certification and compliance
Test reports and declarations are issued per model. Tell us the destination country and we will send the exact set your customs broker will ask for.
| Certification | Covers | Model coverage | Status |
|---|---|---|---|
| UN 38.3 | Transport of cells and packs | All models | Test summary per shipment |
| CE | EU market entry | All models | Declaration on file |
| RoHS | Restricted substances, EU | All models | Declaration on file |
| ISO 9001 | Quality management system | Company-wide | Annual surveillance audit |
Where our containers go
Gulf
UAE · Saudi Arabia · Oman · Qatar · Jordan · Iraq
What this market asks for: 50 °C ambient without derating surprises, SASO and ESMA paperwork that arrives before the vessel, and cabinets that fit a plant room someone else already built.
Southeast Asia
Vietnam · Philippines · Indonesia · Thailand · Malaysia
What this market asks for: high humidity and salt-air corrosion protection, weak-grid behaviour on the BMS, and price points that still work after import duty.
Three people you will actually deal with
Sales manager
First reply within 12 working hours, quotation within two days.
Ask about: MOQ, OEM terms, container loading plans.
Application engineer
Sets the BMS parameters and answers protocol questions.
Ask about: inverter compatibility, parallel limits, firmware.
After-sales
Spares, RMA and warranty claims, matched to the serial number.
Ask about: replacement boards, shipping of spares, field issues.
See the line before you commit to a container
A 30-minute video walk-through of the workshop, the aging room and the test bench. In English, at a time that suits your timezone. No sales deck — bring your questions and we will walk to the machine that answers them.
WhatsApp: +86 159 0046 9197