Grid-tied Inverter Sungrow 33 kW | SG33CX
Officially distributed by XBSolar Joint Stock Company, the String Inverter series features 4 independent MPPTs with a maximum efficiency of up to 98.6%. It is compatible with various types of solar panels (mono, poly, dual-glass, and thin-film technology). Offering a range of superior features, it ensures users a comfortable experience with communication and monitoring options, facilitating easy operation and maintenance via the Web platform or Isolarcloud application.
- The solid one-piece aluminum alloy housing design with a lightweight of only 50 kg ensures easy installation. All Sungrow solar inverters are designed with separate boards, facilitating easy replacement and repair over the operational lifespan.
- The integrated software allows users to monitor intelligent current across each string, perform online IV curve scans and diagnoses on current-voltage curves and voltages. Based on advanced system and diagnostics, it accurately locates abnormal PV positions. Remote data upgrading facilitates convenient O&M operations.
- The integrated Recovery PID function addresses the effects of Potential-Induced Degradation (PID) on the system. PID is a complex process with multiple influencing factors. It leads to a decline in performance not only of individual PV panels but also of entire strings containing affected panels. The system’s power output can decrease by up to 90% over time due to PID. The Recovery PID feature is designed to rectify degraded PV panels, potentially increasing system productivity by up to 10%.
- Sungrow 33kW grid-tied inverter is designed to be compatible with both copper and aluminum AC cables, offering flexibility in design and optimizing installation costs. It can connect two DC cables into one, replacing the traditional method of DC cable connection and saving on DC electrical cable costs.
- With an IP66 rating for the inverter, IP68 rating for the cooling fan, and corrosion protection rating of C5, the Sungrow 33kW grid-tied inverter demonstrates excellent resilience to harsh environments. It is well-suited for various installation scenarios and can withstand challenging conditions, including coastal areas like those found in Vietnam.
- Reactive Power Control at Night (Q at Night), Low Voltage Ride Through (LVRT), High Voltage Ride Through (HVRT), Active Power and Reactive Power Control, and Power Ramp Rate Control.
Grid safety:
Sungrow 33kW grid-tie inverter integrates protection features such as reverse polarity protection for DC, short circuit protection for AC, ground fault protection, along with surge protection rated at level II for both DC and AC. It complies with safety grid regulations and meets all standards including IEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, VDE-AR-N 4110:2018, VDE-AR-N 4120:2018, IEC 61000-6-3, EN 50549, AS/NZS 4777.2:2015, CEI 0-21, VDE 0126-1-1/A1 VFR 2014, UTE C15-712-1:2013, DEWA.
Specifications:
| Circuit Diagram | Power Efficiency Curve |
 |
 |
| Input (DC) | SG33CX |
| Maximum input voltage for PV panel | 1.100 V |
| Minimum input voltage per solar panel / Starting input voltage | 200 V / 250 V |
| Nominal operating voltage | 585 V |
| MPPT Voltage Range | 200 – 1.000 V |
| MPPT Voltage Range for Rated Power | 550 – 850 V |
| Number of independent MPP inputs | 3 |
| Maximum number of string inputs per MPPT | 2 |
| Maximum input current per solar panel | 78 A |
| Maximum input current at the input connection | 30 A |
| Maximum DC short-circuit current | 120 A |
| Output (AC) | |
| AC output power | 36,3 kVA @ 40℃ / 33 kVA @ 45℃ |
| Maximum AC output current | 55,2 A |
| Rated AC voltage | 3 / N / PE, 230 / 400 V |
| AC voltage range | 312 – 528 V |
| Rated grid frequency / Operating range | 50 Hz / 45 – 55 Hz, 60 Hz / 55 – 65 Hz |
| Total Harmonic Distortion (THD) | < 3 % (at rated power) |
| DC current injection | < 0,5 % In |
| Power factor at rated power / Power factor adjustment | >0.99 / 0.8 leading – 0.8 lagging |
| Number of input phases / Number of output phases | 3 / 3 |
| Efficiency | |
| Maximum efficiency / European standard efficiency | 98,6% / 98,3% |
| Protection features | |
| Reverse polarity DC connection protection | Yes |
| AC short-circuit protection | Yes |
| Ground fault protection | Yes |
| Grid monitoring | Yes |
| DC switch / AC switch | Yes/ No |
| Monitoring of string current | Yes |
| Reactive power injection at night | Yes |
| PID recovery function | Customizable |
| Overvoltage protection | DC Class II / AC Class II |
| General information | |
| Dimensions (Width * Height * Depth) | 702 * 595 * 310 mm |
| Weight | 50 kg |
| Isolation method | Transformerless |
| Protection level | IP66 |
| Power consumption (nighttime) | ≤ 2 W |
| Operating temperature range | -30 to 60℃ (> 45℃ reduces power) |
| Allowed relative humidity range (non-condensing) | 0 – 100 % |
| Cooling method | Intelligent air cooling |
| Maximum operating altitude | 4.000 m (> 3.000 m educes power) |
| Display | LED, Bluetooth+APP |
| Communication | RS485 / Optional: Wi-Fi, Ethernet |
| DC connection type | MC4 (Max. 6 mm²) |
| AC connection type | OT or DT connector (max. 70 mm²) |
| Certifications | IEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, VDE-AR-N 4105:2018, VDE-AR-N 4110:2018, IEC 61000-6-3, EN 50438, AS/NZS 4777.2:2015, CEI 0-21, VDE 0126-1-1/A1 VFR 2014, UTE C15-712-1:2013, DEWA |
| Grid support | supports reactive power injection during nighttime, maintains grid connection during voltage dips and surges, controls both active (P) and reactive (Q) power, and regulates power ramp rates. |
| Supplier and warranty provider in Vietnam | XBSolar – Sungrow Service Center |
