Description
Sungrow SG33/50CX-P2 Three-Phase Inverter, 33 and 50 kW
The Sungrow SG33/50CX-P2 range consists of three-phase grid-connected string inverters for commercial and industrial photovoltaic installations. It includes the SG33CX-P2 and SG50CX-P2 models, with three and four independent MPPT trackers respectively, and two string inputs per MPPT.
It combines a maximum efficiency of 98.5 % with dynamic shading optimisation and integrated PID recovery. Its IP66 protection, C5 corrosion resistance classification and diagnostic functions support integration into projects requiring robust equipment and tools for operation and maintenance.
Key Features
Two Models for Professional Projects
SG33CX-P2 and SG50CX-P2, with rated AC output power specified in the datasheet as 33 and 50 kVA.
Three or Four Independent MPPTs
Six string inputs on the SG33CX-P2 and eight on the SG50CX-P2, with a maximum input current of 30 A per MPPT.
98.5 % Maximum Efficiency
98.3 % European efficiency, with dynamic shading optimisation to improve the use of PV generation.
Integrated PID Recovery
A function designed to mitigate the effects of potential-induced degradation, depending on system conditions and compatibility.
Diagnostics for Operation and Maintenance
Intelligent I-V curve diagnostics, string current monitoring and grid fault recording to simplify maintenance.
IP66 Protection and C5 Corrosion Resistance
Type I+II DC and Type II AC surge protection, with AFCI functionality and AFCI 2.0 support specified by the manufacturer.
Technical Specifications
Model Comparison
| Parameter | SG33CX-P2 | SG50CX-P2 |
|---|---|---|
| Rated AC Output Power | 33 kVA | 50 kVA |
| Maximum AC Apparent Output Power | 36.3 kVA* | 55 kVA* |
| Rated AC Output Current at 230 V Phase Voltage | 47.8 A | 72.5 A |
| Maximum AC Output Current | 55.2 A | 83.6 A |
| Independent MPPT Trackers | 3 | 4 |
| Strings per MPPT / Total Inputs | 2 / 6 | 2 / 8 |
| Maximum PV Input Current | 90 A, 30 A per MPPT | 120 A, 30 A per MPPT |
| Maximum DC Short-Circuit Current | 120 A, 40 A per MPPT | 160 A, 40 A per MPPT |
| Maximum / European Efficiency | 98.5 % / 98.3 % | 98.5 % / 98.3 % |
| Unit Weight | 38 kg | 41 kg |
| AC Connection | OT terminal, 16–35 mm² | OT or DT terminal, 35–50 mm² |
Output power values are expressed in kVA in accordance with the datasheet. * In Germany, Belgium, Austria, Ukraine and Denmark, the specified maximum apparent power is 33 kVA for the SG33CX-P2 and 50 kVA for the SG50CX-P2.
PV Input and MPPT Trackers
- Maximum PV input voltage: 1,100 V DC.
- Minimum PV input voltage: 160 V DC.
- Start-up voltage: 200 V DC.
- Rated PV input voltage: 600 V DC.
- MPPT voltage range: 160–1,000 V DC.
- Two string inputs per MPPT.
- Maximum input current per MPPT: 30 A.
- Maximum short-circuit current per MPPT: 40 A.
- Maximum current per DC connector: 20 A.
- Maximum recommended PV power for the SG33CX-P2: 46.2 kWp.
The 30 A limit applies to the combined inputs of each MPPT. The connector’s 20 A limit must be respected alongside the MPPT input and short-circuit current limits. Module compatibility must be checked against voltage and current specifications, as well as rated power.
Grid Connection and AC Output
- Three-phase connection: 3 / N / PE.
- Rated AC voltage: 220 / 380 V or 230 / 400 V.
- AC voltage range: 312–480 V.
- Rated grid frequency: 50 / 60 Hz.
- Frequency range: 45–55 Hz at 50 Hz and 55–65 Hz at 60 Hz.
- Total harmonic distortion: less than 3 % at rated power.
- Power factor at rated power: greater than 0.99.
- Adjustable power factor: from 0.8 leading to 0.8 lagging.
Performance Management and Diagnostics
- Dynamic shading optimisation.
- Integrated PID recovery function.
- Intelligent I-V curve diagnostics.
- PV string current monitoring.
- Diagnostics and protection for key components.
- Grid fault recording to support remote operation and maintenance.
Integrated Protection
- Grid monitoring.
- DC reverse polarity protection.
- AC short-circuit protection.
- Leakage current protection.
- Ground fault monitoring.
- Integrated DC switch.
- Type I+II DC surge protection.
- Type II AC surge protection.
- AFCI arc fault protection function specified in the technical table.
- AFCI 2.0 support specified in the range overview.
Installation and Operating Conditions
- Protection rating: IP66.
- Corrosion resistance classification: C5.
- Unit dimensions, width × height × depth: 645 × 575 × 245 mm.
- Weight: 38 kg for the SG33CX-P2 and 41 kg for the SG50CX-P2.
- Mounting: wall-mounted.
- Topology: transformerless.
- Night-time power consumption: less than 5 W.
- Operating ambient temperature: −30 to +60 °C.
- Permissible relative humidity: 0–100 %, non-condensing.
- Intelligent forced-air cooling.
- Maximum operating altitude: 4,000 m.
Communications and Connections
- LED indicators and access via Bluetooth and app.
- RS485 communication.
- Optional WLAN and Ethernet.
- DC connection: EVO2, with a maximum cable cross-section of 6 mm².
- AC connection on the SG33CX-P2: OT terminal, with a cable cross-section of 16–35 mm².
- AC connection on the SG50CX-P2: OT or DT terminal, with a cable cross-section of 35–50 mm².
- AC cable outer diameter: 18–38 mm.
Grid Support Functions
- Night-time reactive power Q function.
- Low-voltage ride-through: LVRT.
- High-voltage ride-through: HVRT.
- Active and reactive power control.
- Power ramp rate control.
Grid support functions must be configured in accordance with project requirements and the grid operator’s requirements.
Standards Listed in the Datasheet
IEC 62109, IEC 61727, IEC 62116, VDE-AR-N 4105:2018, VDE-AR-N 4110, IEC 61000-6-3, EN 50549-1, EN 50549-2, CEI 0-21:2019, CEI 0-16:2019, VDE 0126-1-1/A1, VFR 2019, UTE C15-712-1:2013, UNE 206007-1/RD 1699, UNE 217002 and G99.
Sungrow Inverters for Commercial and Industrial Installations
The Sungrow SG33CX-P2 and SG50CX-P2 combine independent MPPT tracking, high efficiency and diagnostic functions for grid-connected photovoltaic projects. Their input configuration, IP66 protection and C5 corrosion resistance classification make them an option for commercial and industrial rooftops and other three-phase installations.
At Vico Export Solar Energy, we supply Sungrow inverters and photovoltaic equipment to installers, engineering firms and EPC companies, with domestic and international shipping. Contact our team to discuss availability, supply terms and communication accessories for your project.
Datasheet and Enquiries
Explore the electrical specifications, protection features and operating conditions of the SG33CX-P2 and SG50CX-P2 models.
