--- title: "Sungrow SG17RT-P2 Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Sungrow SG17RT-P2 17 kW grid-tie inverter. Specs: 97.9% European efficiency, 2 MPPT, 1100 V max DC input, 22.0 kg." source: "https://comparepv.com/inverter/sungrow-sg17rt-p2" updated: 2026-01-16 --- # Sungrow SG17RT-P2 ## Identity - **Manufacturer:** Sungrow - **Model:** SG17RT-P2 - **Series:** SG15/17/20RT-P2 - **Rated AC power:** 17 kW - **Type:** Grid-tie - **Phases:** Three-phase ## How it compares Compared against 227 inverters from 12 to 30 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | 97.9% | 98.0% | Typical | 105 | | MPPT trackers | 2 | 2 | Typical | 53 | | Max DC input voltage | 1100 V | 1000 V | Strong - top 21% | 1 | | Weight per kW | 1.3 | 1.6 | Typical | 72 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 17 kW - **Max AC power:** 18.70 kW - **Max apparent power:** 18.70 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 400 V - **Max AC current:** 28.3 A - **Grid frequency:** 50 Hz - **Power factor:** >0.99 at rated power; adjustable 0.8 leading – 0.8 lagging - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC input power:** 25.50 kW - **Max DC voltage:** 1100 V - **MPPT voltage range:** 160 to 1000 V - **Start-up voltage:** 180 V - **MPPT trackers:** 2 - **Max input current per MPPT:** 32.0 A - **Max short-circuit current per MPPT:** 40.0 A ### Efficiency - **European efficiency:** 97.9 % - **Max efficiency:** 98.3 % ### Physical - **Dimensions:** 480 × 370 × 195 mm - **Weight:** 22.0 kg - **Enclosure:** IP65 - **Cooling:** forced-air - **Operating temperature:** -25 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Ethernet, Display - **Protocols:** WLAN, Ethernet, RS485, DI, DO - **Protection:** AFCI, DC switch, Surge protection ### Warranty and certificates - **Certifications:** IEC/EN 61000-6-1/2/3/4, IEC 61000-3-2/3/11/12, IEC/EN 62109-1/2, IEC 61727, IEC 62116, IEC 61683, IEC 60068-2-1/2/14/30/64/27, IEC TS 62910, IEC 60529, EN 50530, AS/NZS 4777.2:2020, VDE-AR-N-4105, DIN VDE 0126-1-1/A1, EN 50549-1, DEWA, VFR 2019, UTE C15-712-1, PSE NC RfG, NTS 2.0, UNE 217001, UNE 217002, MEA/PEA, G98, G99, CEI-021 ### Pros - **Widest MPPT Operating Range in Class** - The MPPT voltage range of 160-1000 V DC ranks among the widest available in three-phase 15-20 kW inverters. The 160 V lower threshold enables power generation under extremely low-irradiance conditions (dawn, dusk, heavy overcast), which in temperate climates translates into measurably higher annual energy yield compared to units with a start-up threshold of ≥200 V. - **AFCI 2.0 and Class II DC SPD as Standard** - Arc-fault circuit interruption (AFCI 2.0, compliant with IEC 62109-2) and a DC surge protective device (SPD) Type II are included as standard from the factory - on competing platforms such as the Fronius Symo, DC SPD is an optional paid accessory. This reduces total system BoS cost and enhances fire safety with no additional investment. - **BNEF Bankability Leader 2025** - Sungrow ranked 1st in the BloombergNEF Inverter Bankability Survey 2025 with 100% recognition among respondents - for the sixth consecutive year. Strong bankability translates directly into warranty coverage, after-sales service availability, and spare parts supply throughout the full 10-year product warranty period. - **European Efficiency ~98.4% - Top of Segment** - The RT-P2 series achieves a European efficiency of up to ~98.4%, placing it at the top of the 15-20 kW class and exceeding the stated European efficiency of the Fronius Symo (~97.0%). The ~1.4 percentage-point difference over a full year for a 20 kW system corresponds to approximately 200-250 kWh of additional energy production annually. ### Cons - **No Battery Storage Support** - The RT-P2 series is a grid-tie-only inverter with no built-in battery interface. Adding energy storage to the system requires replacing the unit with a hybrid inverter (e.g., Sungrow SH-RT) or integrating an AC-coupled external storage solution, either of which significantly increases the cost of any future system upgrade. - **Only 2 MPPT Inputs on Complex Roof Layouts** - Two independent MPPTs are sufficient for typical dual-pitch roof configurations, but on roofs with 3-4 distinct orientations or with distributed shading, the unit is outperformed by inverters offering 4 MPPTs (e.g., Huawei SUN2000-20KTL-M2). This limitation may necessitate the use of power optimizers or an additional string inverter, increasing overall project cost. ## About this series The Sungrow SG15/17/20RT-P2 series are three-phase grid-tie inverters designed for commercial installations and larger domestic systems, where stable operation and high energy yield throughout the year are crucial. What sets them apart is their **wide MPPT operating range** and low startup threshold, allowing them to capture morning production faster and maintain performance under weaker sunlight conditions. The use of **2 independent MPPTs** facilitates the design of rooftop systems with different orientations or partial shading - each tracker can optimise a different string, minimising energy losses. In practice, high European efficiency is also important, as it better reflects the real operating conditions in Poland compared to laboratory maximums, translating to greater annual production. The series offers **24/7 monitoring**, remote updates, and convenient operation via an app, with communication available through both WiFi and Ethernet. Plus: built-in protections (including Type II SPD and fast arc detection) and a robust outdoor enclosure. These are not hybrid inverters - they are not designed for direct integration with energy storage systems. ## Questions ### What is the warranty on Sungrow SG15/17/20RT-P2 inverters? The SG15/17/20RT-P2 series comes with a standard manufacturer's warranty of 10 years. As a Tier 1 manufacturer headquartered in China, Sungrow maintains an extensive service network and provides warranty support in Poland as well. When purchasing, it is advisable to ask your distributor about extended warranty options, which some partners offer on an optional basis. ### Is the Sungrow SG20RT-P2 inverter suitable for installation on a roof with two slopes of different orientations? Yes, the SG15/17/20RT-P2 series is equipped with 2 independent MPPT trackers, meaning each string can be connected to a separate tracker and optimized individually. As a result, installing on a dual-pitch roof - for example, one slope facing south and another facing east - does not cause losses associated with mixing strings of different output levels. This is one of the primary use cases for this series in commercial and larger prosumer systems. ### Can the SG15/17/20RT-P2 be connected to an energy storage system (battery)? No, the SG15/17/20RT-P2 series consists of grid-tie inverters that do not support direct integration with energy storage systems. They have no dedicated DC or AC output for batteries. If you are planning a battery-based system, a hybrid inverter from Sungrow's portfolio will be required - for example, from the SH-RT series. ### What is the European efficiency of the SG15/17/20RT-P2 inverters, and why does it matter in Poland? The European efficiency of the SG15/17/20RT-P2 series is approximately 98.1%, which is an excellent result for this power class. Unlike peak efficiency, European efficiency accounts for operation under partial load conditions - typical of the Polish climate in autumn and winter. Higher European efficiency directly translates into greater annual energy yield. ### How does system monitoring work with the Sungrow SG20RT-P2 inverter, and does it require any additional devices? The SG15/17/20RT-P2 series supports communication via Wi-Fi or Ethernet and integrates with the iSolarCloud platform, available as both a mobile application and a web portal. Monitoring operates 24 hours a day, providing remote visibility into energy production, alerts, and firmware updates. No additional data logger is required to enable remote monitoring - the communication interface is built directly into the device. ### From what DC capacity should the SG15RT-P2 be chosen, and when is the SG20RT-P2 the better option? The SG15RT-P2 is designed for PV systems with a DC capacity of up to approximately 22.5 kWp, the SG17RT-P2 for up to approximately 25.5 kWp, and the SG20RT-P2 for up to approximately 30 kWp - based on a typical DC/AC oversizing ratio of 1.5. The selection of a specific model depends on the total panel capacity and the grid connection limitations of the facility. In commercial installations, the SG20RT-P2 is the most commonly chosen model due to its highest power output in the series and the best cost-per-kilowatt ratio. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/ds-20231113-sg15-17-20rt-p2-datasheet-v2-en-1-dc8a44446d0f.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Growatt MID 17KTL3-X](https://comparepv.com/inverter/growatt-mid-17ktl3-x) | 17 kW | 98.6% | 2 | 23.0 kg | +0.7 pp efficiency, 1.0 kg heavier | | [Huawei SUN2000-17KTL-M0](https://comparepv.com/inverter/huawei-sun2000-17ktl-m0) | 17 kW | 98.3% | 2 | 25.0 kg | +0.4 pp efficiency, 3.0 kg heavier | | [Huawei SUN2000-17KTL-M2](https://comparepv.com/inverter/huawei-sun2000-17ktl-m2) | 17 kW | 98.3% | 2 | 25.0 kg | +0.4 pp efficiency, 3.0 kg heavier | | [Sungrow SG17RT-20](https://comparepv.com/inverter/sungrow-sg17rt-20) | 17 kW | 98.2% | 2 | 20.0 kg | 2.0 kg lighter | | [SOFAR 17KTLX-G3](https://comparepv.com/inverter/sofar-solar-sofar-17ktlx-g3) | 17 kW | 98.2% | 2 | 22.0 kg | Similar on paper | | [Sungrow SG17T-CN](https://comparepv.com/inverter/sungrow-sg17t-cn) | 17 kW | 98.1% | 2 | 21.0 kg | 1.0 kg lighter | | [Huawei SUN2000-17KTL-M5](https://comparepv.com/inverter/huawei-sun2000-17ktl-m5) | 17 kW | 98.1% | 2 | 21.0 kg | 1.0 kg lighter | | [SOFAR 17KTLX-G3P](https://comparepv.com/inverter/sofar-solar-sofar-17ktlx-g3p) | 17 kW | 98.1% | 2 | 20.0 kg | 2.0 kg lighter | --- Source: https://comparepv.com/inverter/sungrow-sg17rt-p2