Sungrow MV Grid-connected PV Inverter for 1500Vdc System

The 1 + X modular MV inverter family from Sungrow (SG3300UD-MV / SG4400UD-MV) is engineered for utility-scale solar farms and large projects. It combines string-level scalability with centralized inverter performance, supporting 1500 V DC systems, high efficiency, and advanced O&M features. 

Key Features & Benefits

• Modular “1 + X” Architecture
  The inverter is built from modular sub-units, enabling redundancy and easier servicing. A failed module can be swapped without fully shutting down the system. 

• 1500 V DC System Compatibility
  Supports high-voltage string inputs, reducing current losses, using fewer combiner boxes, and enabling longer string runs. 

• Ultra-High Efficiency
  Maximum conversion efficiency exceeding 99 % under optimal conditions. 

• Robust Outdoor Design & Cooling

  • Outdoor-rated enclosure (IP65) for deployment in challenging environments. 

  • Forced-air cooling with temperature derating for sustained performance at high ambient temperatures. 

  • Operating temp range from –35 °C to +60 °C (with derating above 45 °C) 

• Scalable & Flexible Capacity
  Modular units can be combined to build systems up to 8.8 MW (per Sungrow documentation) using multiple units.

• Smart O&M & Monitoring
  Advanced diagnostics, remote monitoring, and modular replacement facilitate lower downtime and easier maintenance. 

• Grid-Facing Advanced Controls
  Supports fast active/reactive power control, low-voltage ride-through, harmonics control, and other grid support functions. 

Technical Highlights & Sample Specs