--- title: "Sungrow SG350HX Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Sungrow SG350HX 350 kW grid-tie inverter. Specs: 98.8% European efficiency, 12 MPPT, 1500 V max DC input, 116.0 kg." source: "https://comparepv.com/inverter/sungrow-sg350hx" updated: 2026-01-16 --- # Sungrow SG350HX ## Identity - **Manufacturer:** Sungrow - **Model:** SG350HX - **Series:** SG350HX - **Rated AC power:** 350 kW - **Type:** Grid-tie - **Phases:** Three-phase ## How it compares Compared against 95 inverters from 100 to 500 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | 98.8% | 98.6% | Strong - top 21% | 5 | | MPPT trackers | 12 | 10 | Strong - top 14% | 3 | | Max DC input voltage | 1500 V | 1100 V | Strong - top 24% | 1 | | Weight per kW | 0.3 | 0.6 | Strong - top 5% | 5 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 350 kW - **Max AC power:** 352.00 kW - **Max apparent power:** 352.00 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 800 V - **Max AC current:** 254.0 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading – 0.8 lagging (at nominal power); nominal PF >0.99 - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC voltage:** 1500 V - **MPPT voltage range:** 500 to 1500 V - **Start-up voltage:** 550 V - **MPPT trackers:** 12 - **Max input current per MPPT:** 40.0 A - **Max short-circuit current per MPPT:** 60.0 A ### Efficiency - **European efficiency:** 98.8 % - **Max efficiency:** 99.0 % ### Physical - **Dimensions:** 870 × 1136 × 361 mm - **Weight:** 116.0 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:** RS485, PLC, Bluetooth (via APP) - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** 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, UTE C15-712-1:2013 ### Pros - **Up to 16 Independent MPPTs, 20 A/String** - The series supports up to 16 MPPT trackers with a 20 A per-string input current, enabling direct connection of 500 Wp+ bifacial modules without string paralleling. For installations with irregular tracker geometry or mixed azimuths and tilt angles, this minimizes inter-MPPT losses compared to inverters offering only 8-10 MPPTs in the same power class. - **98.8% European Efficiency** - The rated European efficiency of 98.8% (peak up to 99%) places the SG350HX among the top-tier 350 kW string inverters, on par with the Huawei SUN2000-330KTL-H1. Under typical Polish climatic conditions - characterized by frequent partial irradiance - European efficiency translates directly into annual energy yield. - **Smart IV Curve - Remote String Diagnostics** - The built-in I-V curve scan and diagnostic function enables remote identification of underperforming strings, eliminating the need for on-site service visits with a handheld analyzer. For a plant with dozens of inverters, this significantly reduces O&M costs by removing the need for time-consuming manual measurements at each scheduled inspection. - **Stable Operation on Weak Grids (SCR ≥ 1.16)** - The inverter maintains stable operation at a short-circuit ratio (SCR) of ≥ 1.16 with a reactive power response time below 30 ms. This is particularly relevant for Polish PV plants connected to medium-voltage grids at locations with limited fault level capacity, where standard inverters may exhibit instability or oscillations. - **1500 V DC Architecture** - A maximum DC input voltage of 1500 V allows longer string configurations - more modules per string - reducing the quantity of DC cabling, combiner boxes, and installation labor by an estimated 15-20% compared to 1000 V DC systems, directly lowering the CapEx of utility-scale installations. ### Cons - **~111 kg Unit Weight - Installation Logistics** - The SG350HX weighs approximately 111 kg, while the comparable Huawei SUN2000-330KTL-H1 comes in at around 100 kg - roughly 11% lighter. On commercial rooftop installations or in hard-to-access locations, this requires mechanical lifting equipment, adding to overall installation costs. - **Full I-V Diagnostics Require Sungrow Logger** - The Smart IV Curve function operates exclusively in conjunction with Sungrow's proprietary data logger (iSolarCloud). In projects using a third-party SCADA system or a multi-vendor monitoring platform, a parallel integration is required, increasing the complexity of the plant's IT architecture and potentially incurring additional licensing costs. ## About this series The Sungrow SG350HX series are **grid-connected (on-grid) string inverters** designed for large commercial and industrial installations, where high yield, flexible string design, and rapid diagnostics matter. The use of **multiple MPPTs** facilitates working with different module orientations and minimizes losses due to partial shading - especially in farms with irregular table geometries or varying tilts. High **European efficiency** means more energy realistically fed into the grid under typical climatic conditions in Poland, not just in the lab. A key feature of this series is the **intelligent I-V curve diagnostics** and O&M support functions, which make it easier to detect string performance drops without time-consuming field measurements. For monitoring and integration with higher-level systems, standard communication interfaces (e.g., RS485) are available, and in distributed PV projects, PLC communication is also useful. The construction emphasizes safety - with built-in protections and constant insulation monitoring. The SG350HX series is an excellent choice for EPCs and investors seeking stable grid operation and efficient service and warranty for the project segment. ## Questions ### What types of installations is the Sungrow SG350HX inverter suited for? The Sungrow SG350HX is a three-phase string inverter rated at 350 kW, designed for large commercial and industrial installations as well as utility-scale PV farms. It is not intended for prosumer applications or small rooftop systems. It excels wherever high DC input voltage up to 1500 V is essential, along with flexible string configuration and the ability to serve large PV arrays with varying module orientations. ### How many MPPT inputs does the Sungrow SG350HX have, and why does that matter for a PV farm? The Sungrow SG350HX features 12 independent Maximum Power Point Trackers (MPPT) and supports a total of 24 string inputs. This allows each string of modules to operate at its individual maximum power point independently of the others. This is particularly important on farms with irregular tracker geometry, varying tilt angles, or partial shading, where a loss in performance on one string does not drag down the output of an entire section. ### What is the efficiency of the Sungrow SG350HX and what does it mean in practice? The maximum efficiency of the SG350HX reaches 99%, and its high European efficiency rating translates into real-world energy yield under the variable climatic conditions typical of the Polish market. At an installation capacity of several hundred kilowatts, every fraction of a percentage point in efficiency represents measurable kilowatt-hours delivered to the grid over the course of a year. This is one of the key reasons the series is selected in EPC projects where return on investment is calculated with precision. ### What warranty does the Sungrow SG350HX come with? The standard manufacturer's warranty on the Sungrow SG350HX is 5 years. Sungrow is a recognized Tier 1 manufacturer, which ensures a stable service infrastructure and availability of spare parts. For commercial installations, it is advisable to consult the distributor regarding extended warranty packages or O&M service agreements, which prolong coverage and guarantee a defined response time in the event of a fault. ### What is the I-V curve diagnostics feature in the Sungrow SG350HX, and is it worth using? The built-in I-V curve diagnostics capability allows the inverter to remotely scan the electrical parameters of each string without the need to dispatch a technician to the site with a handheld tracer. This enables rapid detection of damaged modules, faulty connectors, or string degradation. On a large PV farm, this can save dozens of labor hours annually and shortens response time to performance drops before they become costly. ### Is the Sungrow SG350HX compatible with modern bifacial modules and panels exceeding 600 Wp? Yes, the SG350HX is compatible with bifacial modules and supports high-power panels currently available on the market, including those exceeding 600 Wp. It accommodates DC input voltage up to 1500 V and a wide MPPT voltage operating range, enabling flexible string design with the latest large-format modules. Prior to finalizing the system design, it is nonetheless recommended to verify the string configuration using Sungrow's string sizing tool or in consultation with EPC engineers. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/ds-20250617-sg350hx-datasheet-v23-en-07865ef0d9b0.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [SOFAR 350KTLX0](https://comparepv.com/inverter/sofar-solar-sofar-350ktlx0) | 350 kW | 98.8% | | 113.0 kg | 3.0 kg lighter | | [Ginlong Solis S6-GU350K-EHV-M12](https://comparepv.com/inverter/ginlong-solis-s6-gu350k-ehv-m12) | 350 kW | 98.7% | | 134.0 kg | 18.0 kg heavier | | [Ginlong Solis S6-GU350K-EHV-M16](https://comparepv.com/inverter/ginlong-solis-s6-gu350k-ehv-m16) | 350 kW | 98.7% | | 143.0 kg | 27.0 kg heavier | | [Ginlong Solis S6-GU3P350K06-EV-ND](https://comparepv.com/inverter/ginlong-solis-s6-gu3p350k06-ev-nd) | 350 kW | 98.7% | 6 | 117.0 kg | -6 MPPT, 1.0 kg heavier | | [Growatt MAX 350K-X](https://comparepv.com/inverter/growatt-max-350k-x) | 350 kW | 98.5% | 6 | 126.0 kg | -6 MPPT, 10.0 kg heavier | | [Sungrow SG333HX](https://comparepv.com/inverter/sungrow-sg333hx) | 333 kW | 98.8% | 12 | 116.0 kg | -17.0 kW | | [Growatt MAX 333K-X](https://comparepv.com/inverter/growatt-max-333k-x) | 333 kW | 98.5% | 6 | 126.0 kg | -17.0 kW, -6 MPPT, 10.0 kg heavier | | [SolarEdge TerraMax Inverter SE330K](https://comparepv.com/inverter/solaredge-solaredge-terramax-inverter-se330k) | 330 kW | 98.8% | | 175.0 kg | -20.0 kW, 59.0 kg heavier | --- Source: https://comparepv.com/inverter/sungrow-sg350hx