--- title: "Sungrow SG33CX-P2-CN Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Sungrow SG33CX-P2-CN 33 kW grid-tie inverter. Specs: 3 MPPT, 1100 V max DC input, 35.0 kg." source: "https://comparepv.com/inverter/sungrow-sg33cx-p2-cn" updated: 2026-01-16 --- # Sungrow SG33CX-P2-CN ## Identity - **Manufacturer:** Sungrow - **Model:** SG33CX-P2-CN - **Series:** SG33CX-P2 - **Rated AC power:** 33 kW - **Type:** Grid-tie - **Phases:** Three-phase ## How it compares Compared against 243 inverters from 30 to 100 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | - | 98.2% | | | | MPPT trackers | 3 | 4 | Weak - bottom 15% | 82 | | Max DC input voltage | 1100 V | 1100 V | Typical | 3 | | Weight per kW | 1.1 | 1.1 | Typical | 109 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 33 kW - **Max AC power:** 36.30 kW - **Max apparent power:** 36.30 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 400 V - **Max AC current:** 55.2 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading – 0.8 lagging - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC voltage:** 1100 V - **MPPT voltage range:** 160 to 1000 V - **Start-up voltage:** 200 V - **MPPT trackers:** 3 - **Max input current per MPPT:** 30.0 A - **Max short-circuit current per MPPT:** 40.0 A ### Efficiency - **Max efficiency:** 98.6 % ### Physical - **Dimensions:** 575 × 605 × 245 mm - **Weight:** 35.0 kg - **Enclosure:** IP66 - **Cooling:** forced-air - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Bluetooth, Display - **Protocols:** Bluetooth (APP), 4G - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** NB/T 32004-2018, GB/T 37408-2019 ### Pros - **#1 in BNEF Inverter Bankability Ranking 2025** - Sungrow ranked first in the BloombergNEF Inverter Bankability Survey 2025 - for the sixth consecutive year - with a 100% recognition rate among surveyed financial institutions. This directly translates into easier project financing for C&I installations based on this series and confidence in long-term manufacturer support. - **98.5% Peak Efficiency, 160-1000 V MPPT Range** - A peak efficiency of 98.5% places this series at the top of the three-phase string inverter segment for 25-33 kW units. The wide MPPT voltage range (160-1000 V) enables earlier morning start-up under low irradiance conditions and increases daily energy yield in temperate climates. - **IP66 + C5 Rating and 30 A MPPT Input Current** - The IP66 ingress protection rating and C5 corrosion-resistance certification allow outdoor installation in harsh industrial environments without additional enclosures. A 30 A input current per MPPT ensures full compatibility with modules above 500 Wp (182 mm / 210 mm cell formats), eliminating the need to replace inverters when upgrading an existing PV array. - **Built-in AFCI 2.0 and DC SPD Type I+II** - The integrated AFCI 2.0 (arc-fault circuit interrupter) together with DC Type I+II and AC Type II surge protective devices (SPDs) deliver the complete protection suite required or recommended by grid-connection standards for commercial installations. This eliminates the additional cost and labor of sourcing and mounting external protection modules. - **34% Weight Reduction vs. Previous Generation** - Compared to the preceding SG33CX generation, unit weight has been reduced by approximately 34%, enabling single-person installation and shortening commissioning time - a significant advantage on larger C&I projects with multiple inverters and in hard-to-access locations such as industrial rooftops and warehouses. ### Cons - **Standard Warranty Only 5 Years** - The base warranty covers 5 years, while several competitors in this segment - such as the Fronius Symo GEN24 (5+5 years standard) and SMA with the SMA Smart Connected package - offer longer coverage or extended support at no additional cost. For C&I investors modeling LCOE over a 15-20 year horizon, this makes a warranty extension purchase effectively mandatory. - **No Integrated DC Switch on the 33 kW Model** - According to the datasheet, the built-in DC disconnect switch is available only on the 30 kW variant; the 33 kW model does not include it. In practice, this requires an external DC isolator, adding both material cost and installation time on projects with a large number of units. ## About this series The Sungrow SG33CX-P2 series consists of three-phase grid-tie inverters designed for commercial and industrial installations where reliability, fast service, and high energy production matter. The application of three independent MPPTs facilitates the design of roofs with different orientations and pitches, and partial shading limits losses since each area operates at its maximum power point. The manufacturer also offers dynamic shading optimization mode and PID recovery function, which in practice helps maintain yields under more challenging operating conditions. High European efficiency translates into significantly higher annual yield in Poland's typical climate, not just in laboratory conditions. For monitoring the operation, the iSolarCloud platform and app are used, and communication can be carried out via RS485, as well as optionally via WiFi and Ethernet. The series supports advanced safety features, including AFCI 2.0 and overvoltage protection, and complies with popular grid connection standards. The standard warranty period is 5 years. ## Questions ### How many MPPT inputs does the Sungrow SG33CX-P2 inverter have, and is that sufficient for a roof with multiple orientations? The Sungrow SG33CX-P2 features 3 independent MPPT inputs with a total of 6 string inputs. In practice, this allows up to three distinct roof faces (e.g., south, east, and west) to be served with separate maximum power point tracking for each. As a result, losses due to uneven irradiance are minimized - each array section operates independently without degrading the performance of the others. ### What is the warranty on the Sungrow SG33CX-P2 inverter, and can it be extended? The standard manufacturer's warranty for the SG33CX-P2 series is 5 years. Sungrow offers the option to purchase an extended warranty - typically up to 10 or 20 years - which is particularly relevant for commercial installations with long payback periods. Extension terms and conditions should be confirmed with an authorized Sungrow distributor. ### What is AFCI 2.0 in the SG33CX-P2 inverter, and is it truly necessary? AFCI 2.0 (Arc Fault Circuit Interrupter) is a feature that detects arc faults in the DC circuit - a phenomenon that can lead to installation fires. The version 2.0 implemented in the SG33CX-P2 is more sensitive and faster to respond than the previous generation. For commercial and industrial installations, where DC cable runs can be substantial in length, this feature significantly raises the level of safety and is increasingly required by insurance underwriters. ### Is the Sungrow SG33CX-P2 compatible with modern solar panels rated at 500 W and above? Yes, the SG33CX-P2 series is designed for use with 500 W and higher-wattage modules, which are now the standard in commercial installations. It supports an input current of up to 30 A per MPPT input, and the MPPT voltage range is 160-1000 V. This allows string configurations using modern half-cut or bifacial panels to be set up freely without risk of exceeding the inverter's input parameters. ### How can the SG33CX-P2 inverter be monitored, and is the iSolarCloud application free of charge? The SG33CX-P2 inverter connects to the iSolarCloud platform via RS485, with optional WiFi or Ethernet connectivity through an external data logger. The iSolarCloud smartphone app and web portal are both free of charge - they provide real-time visibility into current production, historical yield data, and active alarms. This is a convenient solution for commercial system owners who require continuous access to performance data without additional subscription fees. ### Is the Sungrow SG33CX-P2 suitable for installation in harsh environmental conditions, such as near the ocean or in an industrial facility? Yes, the inverter carries an IP66 protection rating, meaning it is fully protected against dust ingress and powerful water jets. In addition, the series complies with the C5 corrosion resistance standard, which is specifically intended for marine and heavily industrially polluted environments. As a result, the SG33CX-P2 can be installed outdoors without an additional protective enclosure even in demanding locations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/SG33CX-P2-CN-c4ae95bd61bb.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Growatt MID 33KTL3-X](https://comparepv.com/inverter/growatt-mid-33ktl3-x) | 33 kW | 98.5% | | 29.5 kg | 5.5 kg lighter | | [Sungrow SG33CX](https://comparepv.com/inverter/sungrow-sg33cx) | 33 kW | 98.3% | | 50.0 kg | 15.0 kg heavier | | [Sungrow SG33T-P2-CN](https://comparepv.com/inverter/sungrow-sg33t-p2-cn) | 33 kW | 98.3% | 3 | 25.0 kg | 10.0 kg lighter | | [Sungrow SG33CX-P2](https://comparepv.com/inverter/sungrow-sg33cx-p2) | 33 kW | 98.3% | 3 | 38.0 kg | 3.0 kg heavier | | [SOFAR 33KTLX-G3](https://comparepv.com/inverter/sofar-solar-sofar-33ktlx-g3) | 33 kW | 98.2% | | 36.0 kg | 1.0 kg heavier | | [Ginlong Solis S5-GC33K](https://comparepv.com/inverter/ginlong-solis-s5-gc33k) | 33 kW | 98.2% | | 38.2 kg | 3.2 kg heavier | | [Ginlong Solis S6-GC3P33K03-NV-ND](https://comparepv.com/inverter/ginlong-solis-s6-gc3p33k03-nv-nd) | 33 kW | 98.0% | 3 | 26.5 kg | 8.5 kg lighter | | [Deye SUN-33K-G03](https://comparepv.com/inverter/deye-sun-33k-g03) | 33 kW | 98.0% | 4 | 44.5 kg | +1 MPPT, 9.5 kg heavier | --- Source: https://comparepv.com/inverter/sungrow-sg33cx-p2-cn