15 Units 20kW Portable V2V DC Chargers for Shijiazhuang EV Rescue Service Mobile Charging Upgrade

02 Manufacturing Quality: Universal Compatibility & Industrial Protection

2.1 Universal Protocol Compatibility (Protocol Expansion)

This batch of V2V chargers features exceptional scalability and compatibility, supporting seamless conversion between multiple interface standards:

• Mainstream Coverage: Full support for GBT-GBT, CCS-CCS, CHAdeMO-CHAdeMO, and NACS-NACS.
• Intelligent Handshake: The built-in multi-protocol processor identifies the stranded vehicle's BMS protocol within milliseconds, ensuring safe and rapid power transfer.

2.2 "Five-Proof" Engineering for Extreme Environments

Considering the diverse environments of roadside rescue (rain, snow, salt spray, high dust, etc.), the units utilize rigorous industrial-grade protection:

• Full Protection Coating: Control boards and power modules are treated with conformal coating, providing excellent resistance against moisture, mold, salt spray, dust, and water.
• High/Low Temperature Resilience: Utilizing high-grade wide-temperature components, the units operate reliably in Shijiazhuang’s extreme winter cold (-40 °C) or intense summer heat.

2.3 Intelligent Management System

The devices offer deep human-machine interaction. Through the 7-inch screen, operators can monitor the rescue vehicle’s remaining battery level and the charging status of the recipient vehicle. It features both automatic charging modes (intelligent matching) and manual settings for precise control.

03 Rigorous Testing: Ensuring Stability at Critical Moments

Before delivery, all 15 units underwent high-intensity field simulation tests in our laboratory:

• Dynamic Wide-Voltage Input Test: Simulated rescue vehicle battery fluctuations from 260 V to 900 V, verifying that output current remains steady within 50 A.
• Protocol Handshake Verification: Tested against over 20 mainstream EV brands to ensure a 100% charging success rate.
• Full-Load Temperature Rise Test: Conducted a 4-hour continuous full-load test at 20 kW, verifying that efficiency remains above 95% and internal temperatures stay within safe limits.

04 Packing and Shipping: Aesthetic Design & Secure Delivery

4.1 Industrial Design & Packaging

The units comply with national, industry, and corporate standards, featuring a refined industrial design that is both professional and durable. To protect the 40 kg precision instruments during long-distance transit, each unit is secured with thick anti-shock lining and reinforced with a heavy-duty "Wooden Box + Wooden Pallet" packaging system, ensuring structural integrity and safety throughout the transportation process.

4.2 Efficient Delivery

The 15 units were delivered on schedule via a dedicated power equipment logistics line before Shijiazhuang’s peak rescue season. Each unit was accompanied by a comprehensive factory inspection report and bilingual operating manuals.

05 Site Application & Value Outcomes

5.1 Installation & Commissioning

Thanks to the modular design and the 2 m standard cable, the rescue company’s technicians completed installation with simple wiring. The lightweight 40 kg design allows a single operator to handle and deploy the device easily. The intuitive operation and simplified workflow have received high praise from field rescue personnel.

5.2 Value Outcomes

• Reduced Response Time: The average charging response time for stranded EVs in Shijiazhuang’s urban area has been reduced from 2 hours to under 40 minutes.
• Operational Cost Optimization: Compared to traditional flatbed towing, V2V mobile charging rescue has reduced single-operation costs by approximately 60%.
• Enhanced Safety: Comprehensive protection mechanisms (over-voltage, under-voltage, short-circuit, leakage, etc.) ensure the safety of both personnel and equipment.

06 Lifecycle Services

Rockwell Energy Company is committed to providing:

• Remote Protocol Upgrades: OTA (Over-The-Air) firmware updates for new EV models launched in the future to maintain compatibility.
• Professional Technical Training: A 2-day on-site operation and safety maintenance training session for the Shijiazhuang rescue team.
• 24/7 Emergency Support: Given the nature of rescue operations, we provide around-the-clock technical consultation to ensure zero downtime.

Technology empowers rescue; power connects trust. We provide the most reliable supplementary charging technology to safeguard every EV journey!