EV Charging Solutions
Complete Power Infrastructure for Electric Vehicle Charging Stations
Overview
QDTB® provides end-to-end power infrastructure solutions for EV charging stations, from single charger installations to multi-megawatt charging hubs. Our transformer and substation solutions are engineered specifically for the unique load characteristics of EV charging, including high harmonic distortion from power electronics, highly variable load profiles, and demanding reliability requirements for public charging infrastructure.
High Power Density
Compact, high-capacity transformers designed to power multiple DC fast chargers (150kW-480kW+) from a single unit. Optimized for the pulsed load characteristics of modern EV charging.
Power Quality Management
Integrated harmonic filtering and reactive power compensation systems that maintain power factor above 0.95 and THD below 5%, preventing utility penalties and equipment damage.
Outdoor Durability
Weather-rated enclosures (IP54+) with corrosion-resistant coatings, integrated ventilation, and temperature monitoring for reliable operation in all climate conditions from -30°C to +55°C.
Smart Load Management
Intelligent load management systems that dynamically balance power distribution across charging points, implement demand response, and integrate with solar PV and battery storage.
EV Charging Station Design Calculator
Size the transformer, distribution and charging infrastructure for an EV charging station with a complete bill of materials and single-line diagram.
Industry Context & Operational Characteristics
With the rapid popularization of new energy vehicles, EV charging infrastructure has become an important part of urban new energy systems, covering public charging stations, commercial parking charging piles, fleet charging stations and residential community charging projects. EV charging loads have typical characteristics of randomness, peak concentration and nonlinear impact. A large number of DC fast charging equipment generate harmonic interference and peak power impact on the grid, requiring power distribution equipment to have strong peak load resistance, harmonic suppression capability and safe and reliable power supply performance.
Key Operational Challenges
Power Distribution Architecture
Urban grid incoming → Distribution transformer → Low-voltage distribution cabinet → Intelligent charging pile → EV load
Core Equipment Selection
EV Charging Dedicated Distribution Transformers
Recommended Model: S13/S20 ultra-low loss oil-immersed transformers, SCB low-noise dry-type transformers
Core Configuration & Advantages
- Large peak overload margin, adapting to instantaneous high-power charging impact of multiple EVs
- Strong harmonic resistance, effectively coping with nonlinear load interference of DC fast charging piles
- Ultra-low loss design reduces long-term operational energy consumption of charging stations
- Dry-type models feature low noise and flame retardant, suitable for indoor and community charging scenarios
Applications: Public charging stations, residential community charging supporting, commercial parking charging projects.
Fleet Charging Station High-Load Transformers
Recommended Model: Customized high-capacity enhanced transformers
Core Configuration & Advantages
- Customized for taxi fleet, logistics vehicle and bus centralized charging stations
- Supports long-term continuous high-load operation
- Excellent voltage stability
- Effectively solves peak power consumption pressure of centralized fleet charging
Applications: Fleet charging depots for buses, taxis, logistics vehicles.
Switchgear & Substation Selection
Intelligent Power Distribution System
GGD/MNS low-voltage intelligent distribution cabinets realize safe power distribution and circuit protection for charging piles, with leakage protection, over-current protection and fault alarm functions to ensure charging safety.
Smart Load Management System
Dynamically distributes charging power according to real-time grid load, realizes peak-shifting charging, avoids grid overload, and maximizes charging station operational capacity under limited grid capacity.
Power Quality Optimization Equipment
Reactive power compensation cabinets and harmonic filters eliminate charging pile harmonic pollution and reactive power loss, stabilize power factor above 0.95, and reduce grid operation risks and power consumption costs.
Solar & Storage Integrated Expansion Module
Supports seamless integration of PV power generation and energy storage equipment, realizing self-generation and self-use of charging stations and reducing grid electricity dependency.
EV Charging Scenario Customized Design
Peak Load Resistance Upgrade
Reserved sufficient overload margin for centralized fast charging peak demand
Harmonic Suppression Optimization
Targeted power quality optimization for charging pile nonlinear loads
Public Safety Enhancement
Multiple leakage protection and insulation monitoring for high-flow public charging scenarios
Intelligent Peak Shaving Control
Matches smart load management to realize economical and safe charging operation
Green Energy Compatibility
Reserved interface for PV and energy storage system integration and future green charging upgrade
Power Quality Optimization
DC fast charging piles generate severe harmonic pollution and reactive power loss. We deploy reactive power compensation cabinets and harmonic filters to eliminate charging pile harmonic pollution and reactive power loss, stabilize power factor above 0.95, and reduce grid operation risks and power consumption costs.
Key Benefits
Strong Peak Impact Resistance
Effectively adapts to random high-power charging load of new energy vehicles
Stable Power Quality
Eliminates charging station harmonic interference and grid fluctuation risks
High Operational Safety
Multi-level protection system ensures safe charging for public and fleet scenarios
Intelligent Economical Operation
Smart load management reduces grid pressure and operational electricity costs
Flexible Expansion Performance
Supports PV and energy storage integration to build green low-carbon charging stations
Technical specifications
| Capacity Range | 250 kVA - 3,150 kVA |
| Voltage Range | 10kV/35kV to 400V/800V |
| Charging Power | 7kW (AC) to 480kW+ (DC) |
| Insulation Class | F / H (155°C / 180°C) |
| Protection Rating | IP20D (indoor) / IP54 (outdoor) |
| Ambient Temperature | -30°C to +55°C |
| Harmonic Performance | THD < 5% at PCC |
| Power Factor | > 0.95 (with compensation) |
Standards Compliance
Applications
Related Products
Explore QDTB® product lines available for this solution
Oil Immersed Transformers
S13/S20 ultra-low loss transformers for public charging stations, 250kVA-3150kVA
Dry Type Transformers
SCB low-noise dry-type transformers for indoor and community charging scenarios
Box-Type Substations
Prefabricated charging station substations with integrated LV distribution
Low Voltage Switchgear
GGD/MNS intelligent distribution cabinets for charging pile power distribution
Reactors
Harmonic filtering reactors for charging pile power quality compliance
Why Choose QDTB® for EV Charging Solutions
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