Sungrow 4400KVA 1500VDC 4 MPPT 3 Phase PV Central Inverter - SG4400UD-MV-US
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- SKU
- PES-SPS-SIV-0727
- MPN
- SG4400UD-MV-US
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The Sungrow SG4400UD-MV-US is a containerized, medium-voltage central inverter for utility-scale PV plants — 4,400 kVA of three-phase AC output from a 1500 Vdc array, with an integrated MV transformer stepping directly to 34.5 kV and a maximum efficiency of 98.9%. It delivers full rated power at 40°C (104°F) ambient.
Quick specs — Sungrow SG4400UD-MV-US central inverter
| AC output power | 4,400 kVA (full power at 40°C ambient) |
| DC system voltage | 1500 Vdc; MPP range 915–1500 V |
| MPPTs | 4 independent MPPT trackers |
| Max efficiency | 98.9% |
| MV output | Integrated transformer to 34.5 kV medium voltage |
| Form factor | Containerized turnkey station with auxiliary power supply |
| Grid support | LVRT, reactive power control, frequency regulation, night reactive power |
| Monitoring | SCADA and cloud-platform integration, rapid fault detection |
What it’s for & who buys this
Utility-scale developers, EPCs, and IPPs building multi-megawatt solar farms on 1500 Vdc architecture. The integrated MV transformer and containerized design cut balance-of-station work — the skid arrives ready to land, connect, and commission. Portlandia Electric Supply quotes project pricing and coordinates factory lead times for utility buyers.
Sungrow 4400KVA 1500VDC 4 MPPT 3-Phase PV Central Inverter
Model SG4400UD-MV-US | 34.5 kV Medium Voltage | 98.9% Max Efficiency | Containerized Design
Product Overview
The Sungrow SG4400UD-MV-US is a containerized medium voltage, grid-connected photovoltaic central inverter engineered specifically for 1500 Vdc utility-scale systems. This model integrates a built-in MV transformer and auxiliary power supply, delivering full power at 40°C (104°F) with high efficiency and reliable grid support capabilities.
Offering excellent efficiency and stability, this inverter is designed for large-scale solar power generation projects and utility-scale solar farms. It uses advanced power conversion technologies to guarantee high reliability and seamless grid integration. Featuring top-notch MPPT functions, durable build quality, and smart monitoring options, it provides a solid foundation for long-lasting solar energy infrastructure.
Key Features
4 Independent MPPT Trackers: Harvest power efficiently even in inconsistent string conditions. Optimized output reduces energy loss and maximizes yield across large solar arrays.
4400 kVA High-Capacity Output: Significant capacity supports large solar farms seeking steady power delivery. Full power output maintained at 40°C ambient temperature for reliable performance.
1500 VDC System Design: Reduces system costs and boosts power density, making installations more cost-effective. Wide MPP voltage range (915–1500V) accommodates diverse array configurations.
Advanced Grid Support: Stabilizes the grid with reactive power control, low-voltage ride-through capability, frequency regulation, and night reactive power function for continuous grid support.
Smart Monitoring Integration: Compatible with SCADA and cloud platforms for complete plant control. Reports daily energy yields, MPPT tracking performance, voltage patterns, and grid health with rapid fault detection.
Built for Durability: Rugged NEMA 4X/3R enclosure with advanced cooling solutions. Enhanced surge protection, anti-PID technology, and comprehensive AC/DC safety ensure long-term field performance.
How It Works
This containerized central inverter converts DC power from utility-scale PV arrays into grid-compatible AC power at medium voltage (34.5 kV). The integrated MV transformer eliminates the need for external step-up equipment, simplifying installation and reducing project costs.
High Efficiency Conversion: Durable IGBT modules combined with advanced thermal management allow reliable function under severe environmental conditions. Multiple MPPT inputs support consistent power even with challenging array setups, shading, or irregular sunlight.
Advanced Cooling System: Forced air cooling with KNAN (or optional ONAN) transformer cooling keeps performance steady in hot or high-elevation sites, preventing energy loss and ensuring reliable operation.
Scalable Integration: High adaptability for new installations and existing solar projects. Can be deployed in multi-inverter setups or central substations, offering easy scalability for project growth with compact design and efficient wiring.
DC Input Specifications
| Max PV Input Voltage | 1500 V |
| Min / Start-up Input Voltage | 915 V / 955 V |
| MPP Voltage Range | 915 – 1500 V |
| Full Power MPP Voltage Range @ 40°C | 915 – 1337 V |
| Number of Independent MPPTs | 4 |
| Number of DC Inputs | 28 (Negative Grounding); Optional: 24 (Floating) |
| Max PV Input Current | 4 × 1226 A |
| Max DC Short-Circuit Current | 4 × 3528 A |
| Available DC Fuse Sizes | 250 A – 630 A |
| PV Array Configuration | Negative Grounding or Floating |
AC Output Specifications
| AC Output Power | 4400 kVA @ 40°C (Optional: 4400 kVA @ 45°C) |
| Nominal AC Voltage (MV) | 34.5 kV |
| Max AC Output Current | 73 A |
| Nominal Grid Frequency / Range | 60 Hz / 57–63 Hz |
| Total Harmonic Distortion (THD) | <3% (at Nominal Power) |
| Power Factor (Nominal / Adjustable) | >0.99 / 0.8 Leading – 0.8 Lagging |
Efficiency
| Max Inverter Unit Efficiency | 98.9% |
| CEC Inverter Unit Efficiency | 98.5% |
| Max Efficiency (Including Transformer) | 98.2% |
| CEC Efficiency (Including Transformer) | 97.5% |
Protection & Functions
| DC Protection | DC Load Switch + Fuse |
| AC Protection | MV Load Switch + Fuse |
| Surge Protection | DC Type II / AC Type II |
| Grid Monitoring / Ground Fault Monitoring | Yes / Yes |
| Insulation Monitoring | Yes |
| Overheat Protection | Yes |
General Specifications
| Manufacturer | Sungrow |
| Model Number | SG4400UD-MV-US |
| Product Type | Containerized MV Central Inverter with Built-in Transformer |
| Dimensions (W × H × D) | 6058 × 2896 × 2438 mm (238.5 × 114.0 × 96.0 in) |
| Weight | ≤36,376 lb (≤16,500 kg) |
| Transformer Vector | Dy1 (Optional: Dy11, Yny0, YNd1) |
| Degree of Protection | NEMA 4X (Electronic Enclosure) / NEMA 3R (Others) |
| Auxiliary Power Supply | 5 kVA 120 VAC; Optional: 35 kVA 480 VAC + 5 kVA 120 VAC |
| Operating Temperature Range | -35°C to 60°C (-31°F to 140°F); Optional: -40°C to 60°C |
| Allowable Relative Humidity | 0% – 100% |
| Cooling Method | Forced Air Cooling + KNAN (Optional: ONAN) |
| Max Operating Altitude | 1000 m Standard / >1000 m Customized (3281 ft) |
| Display | LED Indicators, Ethernet + WebHMI |
| Communication | RS485, Ethernet (SunSpec/Modbus) |
| Night Reactive Power Function | Yes |
| DC-Coupled Storage / Grid Charging | Optional / Optional |
Certifications & Compliance
Safety: UL1741, UL62109-1, CSA C22.2 No.107.1-16
Grid Interconnection: IEEE 1547-2018, IEEE 1547.1-2020
Advanced Features: UL1741 SA/SB, California Rule 21, HECO SRD V2.0
Additional: NEC 2023, PRC-024
Documentation
● Available | Contact us for lead time and pricing
Frequently asked questions
What is the Sungrow SG4400UD-MV-US?
A 4,400 kVA containerized medium-voltage central inverter for 1500 Vdc utility-scale PV systems, with a built-in MV transformer (34.5 kV output) and auxiliary power supply in a single turnkey station.
Does the SG4400UD-MV-US include the medium-voltage transformer?
Yes. The MV transformer is integrated into the containerized station, stepping inverter output directly to 34.5 kV — no separate transformer skid is required.
How many MPPTs does this central inverter have?
Four independent MPPT trackers across a 915–1500 V MPP window, which limits energy loss when string conditions vary across a large array.
What grid-support functions are built in?
Low-voltage ride-through, reactive power control, frequency regulation, and a night reactive power function for continuous grid support — plus SCADA/cloud monitoring integration.
How does heat affect output?
The station holds full 4,400 kVA rated power at up to 40°C (104°F) ambient temperature, simplifying energy-yield modeling for hot-climate sites.
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Specifications & Documents: Full specifications & datasheet for Sungrow 4400KVA 1500VDC 4 MPPT 3 Phase PV Central Inverter - SG4400UD-MV-US
| SKU | PES-SPS-SIV-0727 |
|---|---|
| MPN | SG4400UD-MV-US |
| Manufacturer | Sungrow |
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