--- title: "Sungrow SG250HX-20 Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Sungrow SG250HX-20 250 kW grid-tie inverter. Specs: 98.8% European efficiency, 6 MPPT, 1500 V max DC input, 106.0 kg." source: "https://comparepv.com/inverter/sungrow-sg250hx-20" updated: 2026-01-16 --- # Sungrow SG250HX-20 ## Identity - **Manufacturer:** Sungrow - **Model:** SG250HX-20 - **Series:** SG250HX-20 - **Rated AC power:** 250 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 | 6 | 10 | Weak - bottom 14% | 56 | | Max DC input voltage | 1500 V | 1100 V | Strong - top 24% | 1 | | Weight per kW | 0.4 | 0.6 | Typical | 26 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 250 kW - **Max apparent power:** 275.00 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 800 V - **Max AC current:** 198.5 A - **Power factor:** > 0.99 / 0.8 leading – 0.8 lagging - **Harmonic distortion (THD):** 1.0 % ### PV input - **Max DC voltage:** 1500 V - **MPPT voltage range:** 500 to 1500 V - **Start-up voltage:** 550 V - **MPPT trackers:** 6 - **Max input current per MPPT:** 65.0 A - **Max short-circuit current per MPPT:** 100.0 A ### Efficiency - **European efficiency:** 98.8 % - **Max efficiency:** 99.0 % ### Physical - **Dimensions:** 779 × 1148 × 371 mm - **Weight:** 106.0 kg - **Enclosure:** IP66 - **Cooling:** forced-air - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 5000 m ### Connectivity and protection - **Interfaces:** Bluetooth, Display - **Protocols:** RS485, Bluetooth (via APP), PLC (Power Line Communication) - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** IEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, NBR 16149, NBR 16150, ABNT NBR IEC 62216 ### Pros - **12 Independent MPPT Trackers, 30 A Each** - Twelve MPPT trackers per 250 kW unit enable PV arrays with mixed orientations and tilt angles to be served without losses caused by string mixing. Each tracker supports up to 30 A of input current, providing native compatibility with 500 Wp+ modules without additional configuration constraints. - **European Efficiency 98.8% (Peak 99.03%)** - An EU-eta of 98.8% places the SG250HX-20 at the top of the 250 kW commercial string inverter segment, where the typical market median sits at 98.2-98.5%. The elevated part-load efficiency translates directly into higher annual energy yield under the variable irradiance conditions characteristic of the Polish climate. - **#1 BNEF Bankability Survey 2025 (6th Consecutive Year)** - Sungrow achieved 100% brand recognition and first place in the Bloomberg NEF Inverter Bankability Survey 2025 for the sixth consecutive year, backed by a cumulative installed base of over 1,000 GW worldwide. This standing directly streamlines project financing with lenders and equity investors that require bankable equipment. - **Fuse-Free DC Architecture + Anti-PID** - The fuse-free design with per-string intelligent current monitoring eliminates DC fuse costs and failure risks, and enables remote fault localization without an on-site service visit. The built-in Anti-PID function and active PID recovery protect modules against potential-induced degradation, which is especially critical in systems with specific grounding configurations. - **IP66 + Corrosion Class C5, Operating Range -30 °C to +60 °C** - IP66 ingress protection combined with the highest corrosion category C5 (industrial and marine environments) and a lower operating limit of -30 °C ensures reliable operation in demanding climatic and industrial conditions without the need for an additional protective enclosure. Smart IV Curve diagnosis and touch-free commissioning further reduce O&M costs. ## About this series The Sungrow SG250HX-20 is a three-phase string inverter of the **grid-tie** type, designed for large commercial and industrial installations where stable operation, rapid service, and high yield under real-world conditions are essential. Its key advantage is the **multi-string MPPT**, which simplifies the design of PV fields with varying exposures and effectively handles partial shading-each tracker precisely manages the power point, minimizing losses on uneven strings. High **European efficiency** ensures the inverter maintains excellent performance not only at peak conditions but also under typical, variable loads in the Polish climate, translating to greater annual energy production. In practice, O&M features include **remote start and updates**, I-V curve diagnostics, and communication (including RS485 and PLC), along with integration with monitoring platforms to quickly detect anomalies. The series meets safety and network code requirements and is available with certification and warranty documentation for projects. ## Questions ### How many MPPT trackers does the Sungrow SG250HX-20 inverter have, and what does this mean in practice? The SG250HX-20 series features up to 12 independent MPPT trackers with a maximum input voltage of 1500 V. In practice, this allows system designers to combine strings with different orientations or tilt angles without significant performance losses. Under partial shading conditions, each tracker independently optimizes its own power point, limiting the impact of underperforming strings on the rest of the array. ### What is the European efficiency of the Sungrow SG250HX-20, and does it matter in Poland? The European efficiency of the SG250HX-20 is 98.80%, with a peak efficiency of 99.00%. In the Polish climate, where the inverter operates at partial load for much of the year, European efficiency is a more accurate predictor of real-world energy losses than peak efficiency alone. A higher European efficiency figure translates directly into greater annual energy yield for commercial installations. ### Can the Sungrow SG250HX-20 be commissioned and updated remotely? Yes, the SG250HX-20 series supports remote commissioning and over-the-air firmware updates. Communication is handled via RS485 and PLC, and integration with the Sungrow monitoring platform enables I-V curve diagnostics and rapid fault detection without requiring on-site service visits. This is a significant advantage for large-scale industrial installations spread across wide geographic areas. ### What certifications does the Sungrow SG250HX-20 hold, and does it meet Polish grid connection requirements? The inverter is certified to IEC 62109, IEC 61727, IEC 62116, VDE-AR-N 4110:2018, VDE-AR-N 4120:2018, and EN 50549, which covers European requirements for generation units connected to medium-voltage grids. The series complies with applicable grid codes and is available with the full certification documentation required by Polish distribution system operators for commercial projects. ### What warranty does the Sungrow SG250HX-20 carry, and what does it cover? The standard warranty for the SG250HX-20 series is 5 years, with the option to extend coverage through Sungrow service packages. It covers manufacturing defects and failures of electronic components. As a Tier 1 manufacturer headquartered in China with a global service network, Sungrow provides access to spare parts and technical support - a critical consideration for O&M contracts on industrial-scale installations. ### What types of installations is the Sungrow SG250HX-20 best suited for, and what is its maximum output power? The SG250HX-20 series is designed for large commercial and industrial installations such as ground-mounted solar farms, warehouses, and manufacturing facilities. Maximum output power is 250 kVA at ambient temperatures up to 30°C, derated to 225 kVA at 40°C. The transformerless design reduces unit weight to approximately 106 kg and increases efficiency, while the IP66 enclosure ensures reliable operation in harsh environmental conditions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/ds-20241224-sg250hx-20-datasheet-v3-en-br-a4b1c9f49d8a.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [SOFAR 250KTLX0](https://comparepv.com/inverter/sofar-solar-sofar-250ktlx0) | 250 kW | 98.8% | | 111.0 kg | 5.0 kg heavier | | [Growatt MAX 250KTL3-X HV](https://comparepv.com/inverter/growatt-max-250ktl3-x-hv) | 250 kW | 98.7% | | 99.0 kg | 7.0 kg lighter | | [Growatt MAX 253KTL3-X HV](https://comparepv.com/inverter/growatt-max-253ktl3-x-hv) | 253 kW | 98.5% | | 109.0 kg | +3.0 kW, 3.0 kg heavier | | [Solis-255K-EHV-5G-PLUS](https://comparepv.com/inverter/ginlong-solis-solis-255k-ehv-5g-plus) | 255 kW | 98.8% | 12 | 113.0 kg | +5.0 kW, +6 MPPT, 7.0 kg heavier | | [SOFAR 255KTL-HV](https://comparepv.com/inverter/sofar-solar-sofar-255ktl-hv) | 255 kW | 98.7% | 12 | 99.0 kg | +5.0 kW, +6 MPPT, 7.0 kg lighter | | [Huawei SUN2000-330KTL-H2](https://comparepv.com/inverter/huawei-sun2000-330ktl-h2) | 275 kW | 98.8% | 6 | 112.0 kg | +25.0 kW, 6.0 kg heavier | | [GoodWe GW225K-HT](https://comparepv.com/inverter/goodwe-gw225k-ht) | 225 kW | 98.5% | 12 | 111.0 kg | -25.0 kW, +6 MPPT, 5.0 kg heavier | | [GoodWe GW225KN-HT](https://comparepv.com/inverter/goodwe-gw225kn-ht) | 225 kW | 98.5% | 12 | 111.0 kg | -25.0 kW, +6 MPPT, 5.0 kg heavier | --- Source: https://comparepv.com/inverter/sungrow-sg250hx-20