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Quality Control

Tested Beyond the Spec Sheet

Every cell, every pack, every shipment — verified through a closed-loop quality system.

From incoming cell grading to 100% burn-in and pre-shipment audit, TURSAN applies a three-gate QC system plus product-specific testing for portable power stations, home energy storage, and mobile EV charging systems. Quality is built into the process — not inspected in at the end.

  • IQC · IPQC · OQC Three-Gate Control
  • 100% Burn-In Tested
  • Full Batch Traceability
  • In-House Testing Lab
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QC Gates Per Unit
0
Burn-In Coverage
0 %
Annual Capacity
< 0 %
Test Record Retention
0 yr
100% Burn-In Test

Every Finished Pack, No Exceptions

MES Traceability

Cell Batch to Serial Number

In-House Lab

Performance · Abuse · Environmental

Standards-Aligned

UL · IEC · UN38.3 · CE

A defect caught at IQC costs cents.

The same defect caught in the field costs a customer.

Our QC Philosophy

Quality Is Built In, Not Inspected In

A battery is only as reliable as its weakest cell and its least-disciplined process step. That's why TURSAN doesn't rely on a single end-of-line check. We control quality at three gates — rejecting bad material before it enters the line, catching process drift the moment it appears, and verifying every finished unit before it ships.

The result is a system where most defects are designed out or screened out long before final inspection — and where every unit that leaves the factory carries a complete, traceable test history.

IQC

Incoming Quality Control

Cells, BMS boards, inverters, enclosures and connectors verified against spec before release to production.

IPQC

In-Process Quality Control

Inline checkpoints at welding, assembly, BMS programming and electrical safety — drift caught at the source.

OQC

Outgoing Quality Control

100% performance, safety, cosmetic and packaging audit before any unit is cleared for shipment.

Quality By The Numbers

The Discipline Behind Every Unit

These aren't aspirational targets — they're the operating standard our QC team is measured against, batch after batch.

QC Gate System
0 -Stage

IQC / IPQC / OQC

Record Retention
0 Years

Per Serial Number

Cells Graded
0 %

Capacity & IR Matched

Packs Burn-In Tested
0 %

Under Full Load

OQC Inspection
0 %

Final Functional Audit

Environmental Tested
0 %

Temp & Vibe Cycled

The QC Checkpoint Journey

Seven Checkpoints, One Pass-Through Standard

Every product — regardless of category — passes the same backbone of quality checkpoints from raw material to the loading dock. A unit only advances when the previous gate signs off.

Step 01
IQC Gate

Incoming Material Inspection

Cells, BMS boards, inverters, enclosures, wiring harnesses and connectors are inspected on arrival. Supplier certificates (CoC, MSDS, test reports) are reviewed; non-conforming batches are quarantined and returned at the source.

Cell capacity & IR check
Certificate validation
Dimensional & visual check
Step 02
IQC Gate

Cell Grading & Matching

Every cell is graded on capacity, internal resistance and open-circuit voltage. Only cells with closely matched profiles are grouped into a pack — capacity variance is held to under 2% to ensure even balancing and full pack life.

Capacity sorting
Internal resistance matching
Voltage curve grouping
Step 03
IPQC Gate

Welding & Assembly Inspection

Laser welds are 100% vision-inspected for cold joints and penetration. Torque-controlled fastening, glue dispensing and module assembly are checked against work instructions with first-piece and hourly sampling.

Weld vision inspection
Torque verification
First-piece sign-off
Step 04
IPQC Gate

BMS Programming & Protection Test

Each BMS is flashed with the correct firmware and verified for communication protocol, cell balancing, and the full protection suite — over-voltage, under-voltage, over-current and short-circuit response.

Firmware verification
Protection logic test
Balancing function check
Step 05
IPQC Gate

Electrical Safety & Insulation Test

Hipot (dielectric withstand) and insulation resistance testing confirm high-voltage isolation and the absence of leakage paths — a mandatory gate before a pack can move to burn-in.

Hipot / dielectric withstand
Insulation resistance
Ground continuity
Step 06
IPQC + OQC

Aging & Burn-In Test

100% of finished packs run 48–72 hour burn-in cycles under load. Temperature, voltage and current are logged every second; any unit showing abnormal behavior, capacity shortfall or balancing drift is pulled for engineering review.

48–72 hr load cycling
Per-second data logging
Capacity confirmation
Step 07
OQC Gate

Final Audit & Pre-Shipment Inspection

OQC engineers perform a 100% final check — rated capacity discharge, BMS function, cosmetic and labeling audit, serial-number verification, and UN3480 DGR-compliant export packaging confirmation.

Capacity verification
Cosmetic & label audit
DGR packaging check

Product-Specific Quality Control

Three Product Lines. Three Tailored Test Regimes.

The QC backbone is shared — but a portable power station, a home storage system and a mobile EV charging battery face very different real-world stresses. Each line runs its own dedicated test program on top of the standard gates.

Portable Power Station QC

Portable units are carried, dropped, charged in the field and connected to a wide mix of devices. QC here focuses on multi-port output integrity, solar input behavior, transport survivability and the user-facing interface — the things that fail a customer if they slip through.

Multi-port output
Solar MPPT input
Drop & vibration
Display / app UX

Dedicated Test Items

Rated Capacity Verification

Full discharge test confirming actual usable watt-hours against the labeled rating.

Tolerance: within rated Wh

Pure Sine Wave & THD Test

AC output waveform, voltage and frequency stability verified with a power analyzer.

Low-THD pure sine wave output

Multi-Port Simultaneous Load

AC, USB-C PD, USB-A and 12V DC outputs loaded together to confirm no port interaction or sag.

All ports under combined load

Solar MPPT Input Test

MPPT controller verified for tracking efficiency, voltage range and charge regulation.

Rated solar input verified

BMS Protection Suite

Over-voltage, under-voltage, over-current, short-circuit and over-temperature responses confirmed.

OVP / UVP / OCP / SCP / OTP

Charge / Discharge Efficiency

Round-trip efficiency and AC/DC charge times measured against product spec.

Round-trip efficiency logged

Drop & Transport Vibration

1-meter drop test on all faces plus transport-simulation vibration on a sampling basis.

1 m drop · multi-axis vibration

Ingress Protection & UI Check

IP rating verification plus LCD / color touch display and Bluetooth app function test.

IP54–IP65 · display & app

Reference Standards

Tested and certified to UL 2743, UN38.3, IEC 62133, CE, FCC, RoHS and MSDS — covering portable power station electrical safety, lithium-battery transport and EMC.

In-House Testing Lab

The Instruments Behind Every Pass / Fail

QC is only as credible as the equipment behind it. Our in-house lab lets us verify performance, abuse tolerance and environmental durability without waiting on a third party — and gives our partners results they can audit.

Battery Cycler System

Multi-channel charge / discharge cycling for cell and pack capacity, efficiency and cycle-life validation.

Climate Chamber

Wide-range thermal cycling for cold-start, high-temperature and environmental qualification testing.

Hipot & Insulation Tester

Dielectric withstand and insulation resistance verification for high-voltage safety compliance.

Power Analyzer

AC waveform, THD, voltage / frequency stability and round-trip efficiency measurement.

Vibration & Drop Rig

Multi-axis vibration table and drop-test rig for transport and vehicle-mount durability.

Thermal Runaway Chamber

Safety-rated chamber for thermal runaway propagation and containment evaluation.

IP Ingress Test Station

Dust-chamber and water-jet testing to verify enclosure ingress-protection ratings.

BMS Validation Bench

Full-function BMS testing — balancing, SOC / SOH accuracy and communication protocols.

Standards & Certification Matrix

Which Standard Applies to Which Product

Different product categories are held to different international standards. This matrix shows the core standards our QC program references across the three product lines — full certificates and test reports are available to partners on request.

UN38.3

Portable Power

Home Storage

Mobile EV Charging

UL 2743

Portable Power

Home Storage

Mobile EV Charging

UL 1973

Portable Power

Home Storage

Mobile EV Charging

IEC 62619

Portable Power

Home Storage

Mobile EV Charging

IEC 62133

Portable Power

Home Storage

Mobile EV Charging

IEC 63056

Portable Power

Home Storage

Mobile EV Charging

CE

Portable Power

Home Storage

Mobile EV Charging

FCC

Portable Power

Home Storage

Mobile EV Charging

RoHS / MSDS

Portable Power

Home Storage

Mobile EV Charging

UN3480 DGR

Portable Power

Home Storage

Mobile EV Charging

StandardPortable PowerHome StorageMobile EV Charging
UN38.3
Lithium battery transport safety
UL 2743
Portable power station safety
——
UL 1973
Stationary storage battery safety
——
IEC 62619
Industrial / storage cell safety
—
IEC 62133
Portable sealed cell safety
—
IEC 63056
Storage-system safety requirements
——
CE
EU conformity
FCC
EMC compliance
RoHS / MSDS
Materials & safety data
UN3480 DGR
Lithium-battery export packaging

Traceability & Documentation

Every Serial Number Has a Full History

QC results only matter if they can be traced and retrieved. Every TURSAN unit is logged through our MES (Manufacturing Execution System) — from the cell batch it was built with to the burn-in curve it produced and the OQC engineer who signed it off.

Cell-Batch to Serial Linkage

Each finished unit is linked to its cell batch, BMS firmware version and production line — full upstream traceability.

Logged Test Data

Burn-in curves, capacity results and protection-test outcomes stored per serial number, retained for 5 years.

Inspector Sign-Off Records

IPQC and OQC checkpoints record the responsible inspector — accountability at every gate.

Shipment Document Pack

CoC, test reports, MSDS and DGR documentation prepared per order for smooth customs clearance.

Defect Management & Continuous Improvement

When Something Fails, We Close the Loop

No process is perfect — what matters is what happens next. Every non-conformance triggers a structured corrective-action cycle so the same issue doesn't reach a second unit, let alone a customer.

01

Detect & Contain

The non-conforming unit or batch is quarantined immediately and isolated from good stock to prevent any escape.

02

Root-Cause Analysis

Engineering investigates the true cause — material, process, design or handling — rather than treating the symptom.

03

Corrective Action

A permanent fix is implemented — work-instruction update, supplier feedback, fixture change or design revision.

04

Verify & Standardize

The fix is verified on subsequent production and folded back into the QC standard so the improvement sticks.

For OEM / ODM Partners — Quality Is a Shared Process

Partners receive batch QC reports, can specify additional test items, and are welcome to appoint third-party inspectors (SGS, Bureau Veritas, Intertek) or run their own pre-shipment audit. Our quality records are open to the partners who rely on them.

Request QC Documentation

Want to See Our Quality Process in Detail?

Tell us which product line you're evaluating and we'll share the relevant test reports, certification certificates and a sample QC report — or arrange a live video walkthrough of the testing lab. Our team responds within 4 hours.

  • Sample QC reports & certification certificates
  • Custom test-item specification for OEM/ODM orders
  • Third-party inspection & pre-shipment audit welcome
  • Live video tour of the in-house testing lab
  • Response within 4 hours from a dedicated contact

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