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In Episode 29 of Field Frequency, Jason sits down with Tim Rees of Power Innovations International (PII) to explore the engineering realities behind reliable EV charging infrastructure. Tim shares how his background in power conversion and data center electronics shaped PII’s unique approach to DC fast charging, with a focus on fleet applications, simplified deployment, and serviceability. The conversation dives into charging architectures, mobile charging solutions, power flexibility, and why reducing failure points matters more than flashy features. From school bus fleets to hydrogen-powered charging trailers, this episode is packed with practical insights into the future of resilient charging infrastructure.

Show Notes

• Tim Rees’ journey from power electronics and data centers into EV charging infrastructure
• An overview of Power Innovations International (PII) and its fleet-focused DC fast charging strategy
• Why PII focuses on 30kW to 60kW charging for predictable fleet operations like school buses and delivery fleets
• Mobile charging solutions and EV rescue applications for fleets and dealerships
• Hydrogen-powered charging trailers and renewable energy integration concepts
• How PII’s charging platforms differ from traditional DC fast chargers:
  • Modular rectifier architecture
  • Reduced failure points
  • Simplified serviceability
  • Air-to-air heat exchanger cooling systems
• Designing chargers around uptime, reliability, and field maintenance efficiency
• Why using existing site power infrastructure can dramatically reduce deployment costs and time
• The relationship between Lite-On Technology and PII, and how vertical integration supports product manufacturing and reliability
• The hidden costs of EV charging deployments beyond the charger hardware itself
• Why durable engineering and long-term reliability matter more than “flashy” charging features in fleet environments

Tim Rees Bio 

Tim Rees is a seasoned executive and business leader with extensive experience driving growth, operational excellence, and strategic transformation across the transportation, technology, and infrastructure sectors. Known for his collaborative leadership style and ability to build high-performing organizations, Tim has spent his career helping companies navigate evolving markets while delivering innovative solutions that create long-term customer value.

Throughout his professional journey, Tim has led teams focused on business development, operational strategy, customer engagement, and market expansion. His expertise spans fleet operations, emerging technologies, infrastructure deployment, and organizational leadership, giving him a unique perspective on the intersection of mobility, energy, and technology-driven transformation.

Recognized for his practical approach and industry insight, Tim is passionate about fostering strong partnerships, developing scalable business strategies, and helping organizations adapt to changing customer and operational demands. Colleagues value his ability to combine strategic vision with hands-on execution, making him a trusted leader and advisor across the industries he serves.