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Solar energy projects are growing rapidly worldwide, and selecting the right transformer is critical for system efficiency, reliability, and long-term cost savings.
Why Transformers Matter in Solar Farms
- Step-up transformers: Increase voltage from the inverter output to the grid interconnection voltage
- Step-down transformers: For off-grid or micro-grid applications
Key Selection Criteria
1. Transformer Capacity
- Typically, transformer capacity = 1.1-1.25x solar array AC output
- Consider future expansion and ambient temperature derating
2. Voltage Class
- Low voltage (400-800V): Direct connection to inverters
- Medium voltage (10kV, 35kV): Grid interconnection
3. Transformer Type for Solar Farms
| Type | Advantages | Best For |
|---|---|---|
| Amorphous (SH15) | Ultra-low losses | Long-hour operation |
| Oil-immersed (S13/S20) | Cost-effective | General solar farms |
| Dry-type (SCB13) | Fire-safe | Urban solar |
Conclusion
For large-scale solar farms with 24/7 operation, amorphous alloy transformers offer the best long-term return on investment.
Runsheng Transformer provides specialized transformers for solar energy projects with IEC 60076 certification.
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