--- title: "Sungrow SG40CX-P3-CN Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Sungrow SG40CX-P3-CN 40 kW grid-tie inverter. Specs: 4 MPPT, 1100 V max DC input, 40.0 kg." source: "https://comparepv.com/inverter/sungrow-sg40cx-p3-cn" updated: 2026-01-16 --- # Sungrow SG40CX-P3-CN ## Identity - **Manufacturer:** Sungrow - **Model:** SG40CX-P3-CN - **Series:** SG36/40CX-P3 - **Rated AC power:** 40 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 | 4 | 4 | Typical | 34 | | Max DC input voltage | 1100 V | 1100 V | Typical | 3 | | Weight per kW | 1.0 | 1.1 | Typical | 88 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 40 kW - **Max AC power:** 44.00 kW - **Max apparent power:** 44.00 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 380 V - **Max AC current:** 66.9 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:** 4 - **Max input current per MPPT:** 40.0 A - **Max short-circuit current per MPPT:** 50.0 A ### Efficiency - **Max efficiency:** 98.6 % ### Physical - **Dimensions:** 595 × 645 × 245 mm - **Weight:** 40.0 kg - **Enclosure:** IP66 - **Cooling:** forced-air - **Noise:** 60 dB - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Display - **Protocols:** 4G, RS485 - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** NB/T 32004-2018, GB/T 37408-2019 ### Pros - **#1 Bankability per BNEF 2025** - Sungrow ranked first in the BloombergNEF Inverter Bankability Survey 2025 - for the sixth consecutive year, with a 100% respondent recognition rate. This status directly facilitates securing non-recourse financing for commercial projects, which is particularly relevant for installations above 36 kW. - **Four independent MPPT trackers** - The series features 4 independent MPPT inputs (each rated up to 30 A, voltage range 160-1000 V DC), allowing up to 8 strings from different roof sections or orientations to be connected. In practice, this reduces mismatch losses under partial shading significantly more effectively than the 2-3 MPPT inverters that dominate the 36-50 kW segment. - **98.3% European efficiency** - A European efficiency of 98.3% (peak efficiency 98.5-98.6%) places the series among the top-tier commercial inverters in this power class. For a 40 kWp installation, a 0.3-0.5 percentage point advantage over weaker market alternatives translates to approximately 120-200 kWh of additional annual yield under Polish irradiation conditions. - **iSolarCloud: remote management without on-site service visits** - The iSolarCloud platform enables one-click firmware updates and remote parameter configuration - no need to dispatch a technician to the site. The built-in Smart IV Curve diagnostics achieves >90% accuracy in identifying faulty modules, reducing MTTR and lowering the O&M cost of commercial installations. - **IP66 + C5 anti-corrosion rating** - The dual protection of IP66 (full dust ingress prevention and resistance to powerful water jets) combined with a C5 coating (high-humidity industrial environments, salt, and aggressive vapors) exceeds the standard IP65 rating found on competing inverters in this power range, extending the unit's service life in demanding locations. ### Cons - **Wi-Fi available as a paid add-on only** - Wireless connectivity is not included as standard - a separate WLAN module or Ethernet/RS485 wiring to iSolarCloud is required. Competing models in this power class (e.g., SMA Sunny Tripower CORE1) offer built-in Wi-Fi and LAN at no additional cost, which affects the total installed cost of the monitoring solution. ## About this series The Sungrow SG36/40CX-P3 series are three-phase grid-tie inverters designed for commercial installations and large rooftops, where stable operation and flexible string management are essential. Their key advantage is **multi-string MPPT tracking** - four independent trackers optimize energy yield for different panel orientations and partial shading, minimizing losses that would otherwise spread across the entire PV generator in simpler designs. High **European efficiency** translates to significantly better energy production in typical operating conditions in Poland, not just in ideal lab settings. In practice, you’ll also benefit from service features: **remote startup and updates**, diagnostics, and monitoring via iSolarCloud, with communication options including Ethernet, RS485, and optional Wi-Fi. The IP66-rated enclosure and surge protection solutions support safety in challenging industrial environments. The series meets connection standards and comes with manufacturer’s warranty, making it a logical choice for investors seeking predictable operation. ## Questions ### How many independent MPPT trackers does the Sungrow SG36/40CX-P3 inverter have, and why does it matter? The SG36/40CX-P3 series is equipped with four independent MPPT trackers. This allows each string group to operate at its individual maximum power point independently of the others. In practice, this translates into higher energy yields on installations with multiple roof orientations or partial shading caused by chimneys or dormers - a typical scenario on commercial rooftops. ### What is the efficiency of the Sungrow SG40CX-P3 inverter, and does it impact energy production? The SG40CX-P3 achieves a maximum efficiency of approximately 98.6%, while its European efficiency - which accounts for real-world operating conditions under variable irradiance - is approximately 98.3%. In climates with frequent partial-load operation, European efficiency is the more meaningful metric, as the system spends the majority of the year running below rated power. A higher European efficiency directly translates into more kWh delivered to the grid over the full operational lifetime of the installation. ### Is the Sungrow SG36/40CX-P3 suitable for commercial installations on industrial halls and warehouses? Yes, the SG36/40CX-P3 series is specifically designed for commercial-scale installations on large flat or pitched roofs. The IP66-rated enclosure provides full protection against dust ingress and high-pressure water jets, which is essential in industrial environments. Built-in surge protection and a wide MPPT voltage range of 160-1000 V allow for flexible string design across large roof surfaces. ### How can the Sungrow SG36/40CX-P3 inverter be monitored remotely? The SG36/40CX-P3 series integrates with Sungrow's iSolarCloud platform, available as both a mobile application and a web dashboard. Communication is established via Ethernet or RS485, with an optional Wi-Fi module. The platform provides real-time production monitoring, alarm diagnostics, remote firmware updates, and remote inverter commissioning - eliminating the need for an on-site service visit for routine operations. ### What warranty applies to the Sungrow SG36/40CX-P3 inverters, and can it be extended? The standard manufacturer's warranty for the SG36/40CX-P3 series is 10 years, although some distributors offer a base warranty of 12 years. Sungrow, as a Tier 1 manufacturer headquartered in China with a global service network, offers extended warranty packages of up to 20 or 25 years. It is advisable to consult your local distributor regarding currently available extended warranty options prior to purchase. ### What is the operating temperature range of the Sungrow SG36/40CX-P3, and will it perform reliably during winter? The SG36/40CX-P3 series operates across a temperature range of -25°C to +60°C, making it fully suitable for winter conditions. At elevated summer temperatures, the inverter may apply power derating, but it operates at full rated output up to approximately 40-45°C. Thermal management is achieved through a combination of active fan cooling and natural convection within the IP66-rated enclosure. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/ds-20240729-sg36-40cx-p3-cn-v1-cn-f63806a96ddb.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Growatt MID 40KTL3-X](https://comparepv.com/inverter/growatt-mid-40ktl3-x) | 40 kW | 98.5% | | 30.5 kg | 9.5 kg lighter | | [Huawei SUN2000-40KTL-M3](https://comparepv.com/inverter/huawei-sun2000-40ktl-m3) | 40 kW | 98.4% | 4 | 43.0 kg | 3.0 kg heavier | | [Solis-40K](https://comparepv.com/inverter/ginlong-solis-solis-40k) | 40 kW | 98.4% | 4 | 61.0 kg | 21.0 kg heavier | | [Sungrow SG40CX-P2](https://comparepv.com/inverter/sungrow-sg40cx-p2) | 40 kW | 98.3% | 4 | 40.0 kg | Similar on paper | | [Sungrow SG40CX](https://comparepv.com/inverter/sungrow-sg40cx) | 40 kW | 98.3% | | 58.0 kg | 18.0 kg heavier | | [Ginlong Solis S5-GC40K](https://comparepv.com/inverter/ginlong-solis-s5-gc40k) | 40 kW | 98.3% | | 42.1 kg | 2.1 kg heavier | | [Deye SUN-40K-G-LV](https://comparepv.com/inverter/deye-sun-40k-g-lv) | 40 kW | 98.3% | 4 | 60.0 kg | 20.0 kg heavier | | [SOFAR 40KTLX-G3](https://comparepv.com/inverter/sofar-solar-sofar-40ktlx-g3) | 40 kW | 98.2% | | 37.0 kg | 3.0 kg lighter | --- Source: https://comparepv.com/inverter/sungrow-sg40cx-p3-cn