Photovoltaic Auxiliary Energy Storage Transformer

Product Detail

Product Overview：

The grid-connected energy storage auxiliary isolation transformer for photovoltaic power generation is generally used for solar inversion, with common voltages including 800V to 400V, 380V, 690V to 400V, 540V to 400V, etc. (customizable as required); due to the low photoelectric efficiency of photovoltaic silicon panels, the transformer is specially required to have high efficiency. The photovoltaic isolation transformer is equipped with a microcomputer intelligent time controller to set daytime operation and nighttime stop for reducing no-load power loss, a temperature controller to real-timely monitor the operating temperature of the transformer, control the start and stop of the cooling fan, and automatically stop and disconnect the transformer when the operating temperature is too high to reach the set critical temperature for protecting the safety of the transformer body, a self-reset overvoltage and undervoltage protector to prevent islanding operation, a surge protector to effectively prevent lightning damage to equipment and improve the safety factor of the power generation system, and a knife switch on the grid-connected side to facilitate effective operation and maintenance of the equipment.

Key Features:

Smart Controls: Microcomputer time controller reduces nighttime no-load losses.
Safety Protections:
Temperature monitor with auto-shutdown at critical thresholds.
Over/under-voltage self-reset protector prevents islanding.
Surge arrester for lightning protection.

Grid-side knife switch for maintenance.

Flexible Configurations: Available in single/multi-unit combinations (1:2, 1:3, etc.) for scalable PV systems.

Technical data：

Operating Conditions

Ambient Temperature: -15 to +50°C
Relative Humidity: 20 to 90% RH
Atmospheric Pressure: 860 to 1060 hPa
Storage/Transport Temperature: -20 to +55°C
Rated Capacity: 5-300KVA
Input Voltage: 800V
Input Current: As per actual capacity
Output Voltage: 400V
Output Current: As per actual capacity
Connection: Dyn11 (△/Y), Yny0 (Y/Y)
Efficiency: ≥96%
Frequency: 50Hz/60Hz
Insulation Impedance: ≤500MΩ at 25mA
Inductive Withstand Voltage: 125Hz/800V/60s
Insulation Class: Class H (155°C temperature resistance)
Noise Level: ≤30dB
Temperature Rise: ≤115K allowable
Impedance Voltage Drop: ≤4%
Cooling Structure: Forced air cooling with temperature controller (fan starts automatically at set temperature per customer requirements)
Protection Class: IP54
Anti-Interference Method: Copper foil isolation, shielded grounding
Waveform Distortion: No additional distortion
Electrical Strength: 3000V AC power frequency sine voltage for 1min without breakdown/flashover
Insulation Resistance (input/output to ground): Test voltage ≥1000VDC, insulation resistance >50MΩ
Overload Capacity: 2x rated current for 1min

Know your supplier

ROCKWILL

Rockwill Electric Group Global Manufacturer of High voltage and medium-voltage power equipment and smart grid solutions. Headquartered in Wenzhou, China. Serving 100+ countries with quality, innovation, and trust. What We Offer: • HV-MV switchgear (VCB, SF₆ circuit breakers, RMU, GIS) • Distribution transformers and substations • Smart grid and monitoring systems • Solar, wind, EV charging, and energy storage solutions • EPC turnkey power projects Certified: ISO 9001 / ISO 14001 / ISO 45001

Main Categories

High voltage

Business Type

Design/Manufacture/Sales

Highest Annual Export (USD)

$150,000,000

Professional Experience

16 years

Workplace

108000m²m²

占位