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Aug 28 2025

Proven Performance, Trusted Worldwide: Preen Power’s AFV+ Earns International Recognition

 

 
As the EV market continues to accelerate, DC charging stations are quickly becoming the backbone of charging infrastructure. However, if a station underperforms, it can compromise not just charging efficiency—but safety as well. That's why rigorous testing is essential; only with precise, reliable test equipment can we ensure optimal real-world performance. Preen's AFV+ series High Power Programmable AC Power Source has become a trusted tool for many charging station manufacturers, thanks to its clean, stable output and powerful test capabilities.
Recently, a globally recognized certification organization selected our AFV+ Series to support their DC fast-charging test programs. To verify performance firsthand, they traveled over 500 miles—from Taiwan to Preen’s Suzhou manufacturing site, for an on-site product evaluation. Our professional team provided a full walkthrough of the AFV+ series, covering product design, control features, and technical operation.
On-Site Client Evaluation: Verified Full-Load Stability
During the visit, the client rigorously tested the AFV-PLUS-331500 that features 1500 kVA (500 kVA per phase), with a focus on full-load output at both 227 V and 554 V. The client conducted repeated measurements of voltage accuracy, frequency stability, and waveform distortion. Test results showed consistently strong performance, confirming the AFV+ series’ ability to deliver clean, stable power even under high-load conditions.
Key Advantages of AFV+ Series
  • High Power with Clean Output: built with advanced PWM high-frequency switching, the AFV+ delivers a pure sine wave output with THD ≤ 0.5% and load regulation ≤ 0.5%. Its output frequency is fully adjustable (45–500 Hz or 45–120 Hz, depending on model), providing unmatched flexibility and control. With capacity up to 2000 kVA per unit, it’s engineered for high-load, high-performance applications. 
  • Powerful Programmability & Fault Simulation: from voltage drops to power interruptions, the AFV+ series can simulate abnormal grid conditions using STEP/RAMP functions. It’s fully programmable, making it ideal for dynamic and complex test routines. 
  • Intelligent Protection Architecture: with 29 built-in protections including overvoltage, undervoltage, and overcurrent, plus 255 event and fault log records, the AFV+ ensures both system safety and in-depth troubleshooting support. 
  • Built for Compliance & Certification: DC charging stations must meet rigorous EMC and safety standards—so must the test equipment. The AFV+ Series is CE certified and compliant with global safety and EMC requirements, making it a rock-solid foundation for pre-certification and performance testing. 
  • Flexible Communication & Remote Integration: perfectly suited for Industry 4.0 environments, the AFV+ supports RS-232/RS-485 (standard), and Ethernet, analog, and GPIB (optional). Paired with Preen Program software, it enables fully automated, remote-controlled test workflows. 
A 500-Mile Journey of Trust and Proof
  • Accurate, repeatable output to ensure product consistency and competitiveness.
  • Robust design that minimizes downtime and maintenance.
  • Professional support from Preen’s expert team for peace of mind at every stage.
Want to see how AFV+ fits into your EV testing setup?
Reach out today for personalized consultation and application insights!

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