
ESS Main Power Wiring Harness
Custom-designed main power wiring harness for containerized ESS. 1500V DC rated, integrated temperature monitoring, military-grade connectors.
Key Specifications
Voltage Rating1500V DC
Current RatingUp to 500A per circuit
Cable TypeSilicone Rubber, High-Flex
Temperature Range-60°C to +180°C
ProtectionCorrugated PA Conduit
StandardsIPC/WHMA-A-620 Class 3
Features
- 1500V DC system voltage
- Silicone rubber insulated high-flex cables
- Integrated temperature sensor wiring
- Halar corrugated conduit protection
- 100% continuity and hipot tested
Containerized BESSUtility-Scale StorageC&I Energy StorageData Center Backup Power

BMS Cell Monitoring Harness
Precision BMS cell voltage and temperature monitoring harness with color-coded identification and automotive-grade connectors.
Key Specifications
Wire Gauge0.5-2.5 mm² (AWG 20-14)
Voltage Rating300V / 600V
Temperature Range-40°C to +105°C
Configurations12S, 16S, 24S, 32S, 48S
Wire StandardUL 1007, UL 1569, FLRY-B
StandardsIPC/WHMA-A-620 Class 2/3
Features
- Available in 12S to 48S
- Color-coded wire identification
- Automotive-grade connectors
- Fuse-protected sense lines
- Twisted pair for noise immunity
Battery Management SystemsEV Battery PacksResidential ESSIndustrial Battery Monitoring

HV Battery Cable Assembly
Shielded high-voltage battery cable assemblies with EMI/RFI shielding and orange XLPE jacket for EV traction batteries.
Key Specifications
Voltage RatingUp to 1500V DC
Current RatingUp to 500A
Cable Range16-120 mm²
ShieldingTinned Copper Braid, >85% Coverage
Jacket MaterialXLPE / XLPO, Orange
StandardsLV 216, ISO 19642
Features
- Shielded HV cable with orange jacket
- Available in 16mm² to 120mm²
- EMI/RFI 360° shielding
- Integrated HVIL loop option
- Laser-marked traceability
EV Traction BatteriesHybrid Vehicle BatteriesElectric Bus BatteriesMarine Battery Systems
Frequently Asked Questions
What types of wiring harnesses do you produce for ESS?
We produce ESS main power wiring harnesses (1500V DC rated), BMS cell monitoring harnesses (12S-48S configurations), high voltage battery cable assemblies (shielded, 16-120mm²), and custom harness solutions. All are manufactured to IPC/WHMA-A-620 Class 3 standards with 100% continuity and hipot testing.
Do you provide custom harness design services?
Yes. Our engineering team can work from your specifications, 3D models, or wiring diagrams to design and prototype custom harness solutions. We provide full documentation including wiring diagrams, BOM, test reports, and PPAP documentation. Turnaround for custom designs is typically 7-15 days.
Where is PowerConnect Technologies located?
Our headquarters and 25,000 m² manufacturing facility is located in Shenzhen, Guangdong, China (No. 88, Xingye Road, Bao'an District). We have 12 automated production lines, 500+ employees, and export to 30+ countries worldwide. Visit our Factory Tour page for a virtual walkthrough.
What quality certifications does your factory hold?
We hold ISO 9001:2015, IATF 16949:2016, ISO 14001:2015, and our products are certified to UL, TUV, CE, RoHS, and REACH standards. We implement a 5-stage quality control process from incoming material inspection to final outgoing QC with 100% testing. See our Quality Control page for details.
How do I request a quote or sample?
You can request a quote through our Contact page, by clicking the 'Request Quote' button on any product page, or by contacting us via WhatsApp (+86-755-8888-6666) or email (sales@powerconnect-tech.com). We respond to all inquiries within 24 hours.
Need a Custom Wiring Harness?
Tell us your specifications and our team will provide a tailored proposal.