Solar Step-up Transformer
10-28 2025 | By:
For solar power plants, the “step-up” transformer is the linchpin that enables inverter output to reach grid connection voltage. At ZTelec Yuguang, our solar step-up transformers are engineered specifically for PV environments – with optimal performance, reliability and custom features.
Key requirements for solar step-up transformers
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Rapid ramping load changes due to cloud cover and PV output variability.
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High ambient temperatures, humidity, dust—especially for outdoor installations.
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Minimal maintenance downtime and long service life.
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Integration with grid-tie inverters and switchgear (often ABB/Schneider).
Types & specifications of solar step-up transformers
| Type | Voltage Range (kV) | Capacity (kVA) | Cooling / Insulation | Solar-Specific Features |
|---|---|---|---|---|
| Dry-Type Step-Up | 0.4 / 0.69 → 10 / 20 / 35 | 30 – 6 300 | Resin cast, air cooled | Low fire risk, indoor inverter rooms |
| Oil-Immersed Step-Up | 6 / 10 → 20 / 35 | 100 – 15 000 | Oil immersed, outdoor | High thermal capacity and overload strength |
| Pad-Mounted Liquid Filled | 480 V → 12.47 / 13.2 kV | 100 – 3 000 | Liquid filled enclosure | Compact footprint, easy field install |
Feature spotlight
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Custom winding taps: For PV plants with varying output, our units offer multiple tap positions to account for grid changes.
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Low-loss design: Optimised core and winding to reduce no-load and load losses in solar duty.
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Outdoor ruggedisation: For oil-immersed and pad-mount units, designed for desert, coastal, high-humidity zones.
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Brand integration: We seamlessly integrate ABB/Schneider auxiliary equipment (e.g., tap-changer controllers, protection relays) into our offerings.
PV station case example
ZTelec Yuguang delivered a pad-mounted liquid filled 2 000 kVA transformer (480 V → 12.47 kV) for a distributed solar farm in Kenya. The unit arrived as a turnkey package with custom enclosure, remote tap-changer control and full pre-commissioning testing. It reduced installation time by 30% and integrated smoothly with Schneider switchgear.
500kva dry-type transformer with shell exported to the United States
Why partner with ZTelec Yuguang for your solar step-up transformer
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Strong PV project experience – “Transformer for photovoltaic projects” is explicitly listed in our applications.
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Flexible customisation – OEM & brand integration for ABB/Schneider.
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Transparent spec sheets, fast quotations and direct factory pricing.
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Global export footprint – Over 50 countries served.
Photovoltaic Step-Up Transformers
For your next solar plant, whether utility-scale or distributed, let ZTelec Yuguang supply the heart of your step-up solution.
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