solar-inverter

SG4400UD-MV-US

The Sungrow SG4400UD-MV-US is a modular 1500V utility-scale inverter with up to 4400 kVA capacity, featuring high efficiency (up to 99%) and advanced three-level technology. It supports bidirectional power conversion, full four-quadrant operation, and is designed for outdoor use with options for corrosion resistance. The inverter complies with standards such as UL1741 and IEEE1547, offering fast power response and grid support functionalities, suitable for high-voltage PV systems (sources: documents 3, 4, 8, 10, 12, 14, 15).

Pros and cons

Pros

Strengths called out by generated product content.

High efficiency of over 99%
Modular design for easy maintenance
Proven reliability with over 200 installations and positive feedback since 2021
Suitable for large-scale solar projects with 4400 kVA output and 1500V design
Effective cooling and full power operation at 50°C
Integrated transformer and auxiliary power supply reduce system costs
Supports online analysis and troubleshooting with integrated monitoring

Cons

Tradeoffs and constraints to review before choosing.

Deemed difficult to deal with for warranty claims and customer support
Some users report poor customer service and warranty handling
Limited support or familiarity in residential markets, more common in commercial/industrial sectors
Potential issues with firmware updates causing system malfunctions
Not recommended for residential use due to market focus and support concerns

Notes

Context that does not fit neatly as a pro or con.

Operates with advanced three-level technology and active/reactive power control
Supports low/high voltage ride through and soft start/stop functions
Designed to meet various standards including UL and IEEE1547

Electrical Specifications

Max Output Power: 4,400 W1
Max Input Voltage: 1,500 V2
Input Voltage Range: 1500V1

Power Ratings

Rated Power: 4,400 kVA1
Max Apparent Output Power: 4,400 kVA

Performance

Efficiency: 99 %1
Operating Temperature Range: -35~60 ℃1

Electrical Output

Rated Grid Voltage: 1,500 V
Power Factor: 1 leading1

Physical Characteristics

Weight: 2.39 kg

Connectivity

Communication Interfaces: Integrated current, voltage and MV parameters monitoring function for online analysis and trouble shooting1

Efficiency

Efficiency Max: 99 %

Features

Features: Active & reactive power control, Compliance with standards: UL 1741, Effective cooling, High efficiency over 99%, IEEE 1547, L/HFRT, Low/High voltage ride through (L/HVRT), Modular design, NEC, Optional Q at night, Power ramp rate control, Rule 21, Soft start/stop, UL 1741 SA/SB, Wide operation temperature range1

Protection Features

DC Reverse Polarity Protection: Yes1
Short Circuit Protection: Yes1
Output Over Current Protection: Yes1
Output Over Voltage Protection: Yes1
Insulation Resistance Monitoring: Yes1
Residual Current Detection: Yes1
Surge Protection: Yes1
Grid Monitoring: Yes1
Islanding Protection: Yes1
Temperature Protection: Yes1

Environmental

Cooling Concept: Effective cooling

Sources

Source 1en.sungrowpower.comen.sungrowpower.com18 facts
Max Output Power Input Voltage Range Rated Power Efficiency Operating Temperature Range Power Factor Communication Interfaces Features DC Reverse Polarity Protection Short Circuit Protection Output Over Current Protection Output Over Voltage Protection Insulation Resistance Monitoring Residual Current Detection Surge Protection Grid Monitoring Islanding Protection Temperature Protection
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Source 2sungrowpower.comsungrowpower.com1 fact
Max Input Voltage
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