Description
Sungrow SG350HX-20 Three-Phase Inverter, 350 kW
The Sungrow SG350HX-20 is a three-phase grid-connected string inverter for utility-scale photovoltaic plants with a 1,500 V DC architecture. It features 6 independent MPPT trackers, with up to five inputs per MPPT and a maximum input current of 75 A per tracker, allowing the PV array configuration to be adapted to the project.
It achieves a maximum efficiency of 99.02 % and provides a three-phase output at 800 V AC. It integrates RS485 and PLC communication, intelligent I-V curve diagnostics and AC and DC insulation monitoring. The datasheet specifies an output power of 352 kVA at 30 °C, 320 kVA at 40 °C and 295 kVA at 50 °C.
Key Features
1,500 V DC Architecture
Inverter for utility-scale solar plants, with a rated PV input voltage of 1,080 V and a three-phase output at 800 V AC.
6 MPPTs and up to 30 Inputs
Up to five inputs per MPPT and a maximum current of 75 A per tracker to adapt string distribution to the project design.
99.02 % Maximum Efficiency
98.8 % European efficiency and total harmonic distortion of less than 1 % at rated power.
PLC Communication and I-V Diagnostics
Power line communication and diagnostic tools to simplify plant operation and maintenance.
Grid Support Functions
Night-time Q function, active and reactive power control and weak grid operation with SCR ≥1.1, as specified by the manufacturer.
IP66 and C5 Corrosion-Resistant Design
Intelligent DC switch, AC/DC insulation monitoring and IP68-rated fans specified in the product overview.
Technical Specifications
Key Specifications
| Parameter | SG350HX-20 |
|---|---|
| AC Output Power | 352 kVA at 30 °C / 320 kVA at 40 °C / 295 kVA at 50 °C |
| Rated AC Output Voltage | 800 V, 3 / PE |
| Maximum PV Input Voltage | 1,500 V DC |
| Independent MPPT Trackers | 6 |
| Maximum Inputs per MPPT / Total | 5 / 30 |
| Maximum Input Current per MPPT | 75 A |
| Maximum / European Efficiency | 99.02 % / 98.8 % |
| Dimensions, Width × Height × Depth | 1,148 × 779 × 371 mm |
| Specified Weight | ≤106 kg* |
Output power is expressed in kVA in accordance with the datasheet and varies with temperature. * The manufacturer notes that actual weight may vary by ±8 % due to the supply of certain components; the delivered unit must be checked.
PV Input and MPPTs
- Maximum PV input voltage: 1,500 V DC.
- Minimum PV input voltage: 500 V DC.
- Start-up voltage: 550 V DC.
- Rated PV input voltage: 1,080 V DC.
- MPPT voltage range: 500–1,500 V DC.
- Independent MPPT trackers: 6.
- Maximum number of inputs per MPPT: 5.
- Maximum PV input current: 6 × 75 A.
- Maximum DC short-circuit current: 125 A per MPPT.
- DC connection: Evo2.
AC Output and Grid Connection
- Output power: 352 kVA at 30 °C, 320 kVA at 40 °C and 295 kVA at 50 °C.
- Maximum AC output current: 254 A.
- Rated AC voltage: 800 V.
- Three-phase connection: 3 / PE, without neutral.
- AC voltage range: 640–920 V.
- Rated frequency: 50 / 60 Hz.
- Frequency range: 45–55 Hz at 50 Hz and 55–65 Hz at 60 Hz.
- Total harmonic distortion: less than 1 % at rated power.
- DC current injection: less than 0.5 % of rated current.
- Power factor at rated power: greater than 0.99.
- Adjustable power factor: from 0.8 leading to 0.8 lagging.
- AC connection via OT or DT terminal, with a maximum cable cross-section of 400 mm².
Diagnostics, Communications and Grid Support
- RS485 and PLC communication.
- LED indicators and access via Bluetooth and app.
- Intelligent I-V curve diagnostics.
- String current monitoring.
- Integrated power supply and communication interface for solar tracking systems.
- Night-time reactive power Q function.
- LVRT and HVRT.
- Active and reactive power control and power ramp rate control.
- Q-U and P-f control.
- Weak grid operation with SCR ≥1.1, as specified by the manufacturer.
- Fastest specified reactive power response time: 20 ms.
Protection and Functions
- DC reverse polarity protection.
- AC short-circuit protection.
- Leakage current protection.
- Grid and ground fault monitoring.
- 24-hour real-time AC and DC insulation monitoring.
- Intelligent DC switch with automatic disconnection in the event of faults.
- AC switch: not integrated, according to the datasheet.
- Type II surge protection on DC and AC sides.
- Anti-PID function and PID recovery: optional.
Mechanical Specifications and Operating Conditions
- Dimensions, width × height × depth: 1,148 × 779 × 371 mm.
- Specified weight: ≤106 kg, subject to the manufacturer’s note regarding ±8 % variation.
- Topology: transformerless.
- Protection rating: IP66.
- C5 corrosion-resistant design specified in the product overview.
- IP68-rated fans specified by the manufacturer.
- Intelligent forced-air cooling.
- Night-time power consumption: less than 6 W.
- Operating ambient temperature: −30 to +60 °C.
- Permissible relative humidity: 0–100 %.
- Maximum altitude: 5,000 m, with power derating above 4,000 m.
Standards Listed in the Datasheet
IEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, VDE-AR-N 4110:2018, VDE-AR-N 4120:2018, EN 50549-2, UNE 206007-1:2013, P.O.12.3 and UTE C15-712-1:2013.
Sungrow SG350HX-20 for Utility-Scale Photovoltaic Projects
The SG350HX-20 combines six 75 A MPPTs, up to thirty inputs and an 800 V AC output for 1,500 V DC photovoltaic plants. Its input configuration and diagnostic tools make it an option for projects with different DC/AC ratios and operational requirements.
At Vico Export Solar Energy, we supply Sungrow inverters and photovoltaic equipment to engineering firms, installers and EPC companies, with domestic and international shipping. Contact us to discuss availability, supply configuration and documentation for your project.
Datasheet and Enquiries
Consult the SG350HX-20 V5 datasheet. The document is marked as preliminary; confirm the equipment configuration and specifications before finalising the project design.
