Enameled Aluminum Wire
Advantages of Foil-Wound Transformers in PV Power Systems
What Is a Foil-Wound Transformer?
Foil-wound transformers use flat strips of conductive material (typically aluminum or copper foil) instead of traditional round wires for winding transformer coils. These windings allow lower resistance, better heat dissipation, and improved mechanical stability, especially in demanding electrical applications like solar power systems.
The Role of Transformers in PV Power Systems
Transformers in solar systems are essential for:
- Stepping up voltage between inverters and grid connection
- Ensuring galvanic isolation and system safety
- Enhancing power conversion efficiency and reliability
They play a key role in converting DC output from solar panels into stable, usable AC power.
Key Advantages of Foil-Wound Transformers
- Better Heat Dissipation: Larger surface area leads to more efficient cooling and longer lifespan.
- Lower AC Losses: Minimized skin and proximity effects reduce eddy current losses.
- Compact & Lightweight: Ideal for rooftop or mobile PV applications with space limitations.
- Improved Mechanical Strength: Foil coils offer high axial strength against short-circuit forces.
- High Reliability: Fewer joints and precise layering result in durable, long-life performance.
Aluminum vs. Copper Foil in PV Transformers
| Feature | Aluminum Foil | Copper Foil |
|---|---|---|
| Weight | Lighter, easier to handle | Heavier but compact |
| Cost | More economical | More expensive |
| Conductivity | Lower than copper | Higher electrical efficiency |
| Corrosion Resistance | Good with surface treatment | Excellent with coating |
| Availability | Widely available | Limited for foil form |
Applications in PV Systems
- String inverter transformers
- Central inverter step-up transformers
- Grid-tied transformer stations
- Off-grid solar with battery storage
A Smart Choice for Solar Energy
Foil-wound transformers offer significant advantages for modern PV systems, including high efficiency, compact design, and robust thermal and mechanical performance. They help solar operators achieve better energy yield and longer system life.
Need a Reliable Transformer Partner?
We specialize in custom foil-wound transformers for solar energy applications.
- Aluminum or copper foil options
- OEM/ODM manufacturing support
- Global export and CE/UL compliance
