--- title: "SOFAR 17KTLX-G3 Grid-tie Inverter: Specs & Prices | ComparePV" description: "SOFAR 17KTLX-G3 17 kW grid-tie inverter: 3 shop offers from 3 799.04 zł. Specs: 98.2% European efficiency, 2 MPPT, 1100 V max DC input, 22.0 kg." source: "https://comparepv.com/inverter/sofar-solar-sofar-17ktlx-g3" updated: 2026-10-11 --- # SOFAR 17KTLX-G3 ## Identity - **Manufacturer:** Sofar Solar - **Model:** SOFAR 17KTLX-G3 - **Series:** SOFAR 15-24KTLX-G3 - **Rated AC power:** 17 kW - **Type:** Grid-tie - **Phases:** Three-phase ## Price offers Prices are the figure each shop printed, on that shop's side of VAT. | Shop | Market | Price | Per kW | Availability | Last read | | --- | --- | --- | --- | --- | --- | | [Sklep Soltech](https://comparepv.com/go/6276) | Poland | 3 799.04 zł net | 223.47 zł/kW | Not stated | Last read 11 Oct 04:38 | | [7Sun](https://comparepv.com/go/228190) | Poland | 4 869.91 zł incl. VAT | 286.47 zł/kW | In stock | Last read 11 Oct 02:36 | | [ensun.sk](https://comparepv.com/go/94519) | Slovakia | 1 299.42 € incl. VAT | 76.44 €/kW | In stock | Last read 11 Oct 00:49 | ## 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 | 98.2% | 98.0% | Typical | 36 | | 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 apparent power:** 18.70 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 400 V - **Max AC current:** 27.1 A - **Grid frequency:** 50 Hz - **Power factor:** 1 (adjustable +/-0.8) - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC voltage:** 1100 V - **MPPT voltage range:** 140 to 1000 V - **Start-up voltage:** 160 V - **MPPT trackers:** 2 - **Max input current per MPPT:** 26.0 A - **Max short-circuit current per MPPT:** 36.0 A ### Efficiency - **European efficiency:** 98.2 % - **Max efficiency:** 98.6 % ### Physical - **Dimensions:** 430 × 520 × 198 mm - **Weight:** 22.0 kg - **Enclosure:** IP65 - **Cooling:** forced-air - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Bluetooth, Display - **Protocols:** RS485, Wi-Fi, Bluetooth (App) - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** IEC/EN 61000-6-1/3, IEC/EN 61000-3-11/12, IEC 62116, IEC 61727, IEC 61683, IEC 60068-1/2/14/30, IEC/EN 62109-1/2, G99, VDE-AR-N 4105, VDE V 0126-1-1, EN 50549-1, NRS 097-2-1 ### Pros - **Peak efficiency of 98.75% - premium class** - The rated peak efficiency of 98.75% (per Sofar Solar/Krannich datasheet) positions this series alongside the Fronius Symo Gen24 (98.5%) and Huawei SUN2000-20KTL (98.6%). On a 20 kW system with an annual yield of 1,100 kWh/kWp, this translates to a real gain of several hundred kWh per year compared to inverters rated at 97.5-98.0% efficiency. - **DC voltage up to 1,100 V with 4 string inputs** - Two independent MPPTs with a maximum input voltage of 1,100 V and an operating range of 140-1,000 V allow long strings to be built using modern 500+ Wp modules (e.g., 22 modules × 500 Wp = 1,050 V Voc at 0 °C), reducing cable runs, connectors, and overall BoS costs. - **Integrated Type II SPD protection - DC and AC** - Built-in Type II surge protective devices on both the DC and AC sides (per PVO International datasheet) eliminate the need for separate surge protection equipment costing PLN 200-400, which remains an add-on requirement for lower-cost competing inverters. - **Fanless cooling - zero moving parts** - Passive natural convection cooling eliminates fan failures (the most common fault mode in SME-class inverters), ensures silent operation, and allows indoor installation in office or commercial buildings without the need for acoustic enclosures. - **5 power variants (15/17/20/22/24 kW)** - 2-3 kW power steps enable precise inverter sizing to the DC array without over-specification - for example, a 21 kWp system can be matched with the 22KTLX-G3 instead of paying a premium for a competitor's 25 kW model. The resulting DC/AC ratio of 1.05-1.15 remains optimal for Polish climatic conditions. ### Cons - **Standard warranty limited to 5 years** - The factory warranty covers 5 years (SolarTraders, Sofar official website). The Huawei SUN2000 in the same power class offers 10 years as standard across most European markets. Extension to 10 years is available in Poland through selected distributors, but at an additional cost - a significant consideration when calculating TCO for a commercial installation over a 15-20 year horizon. - **Reported issues with the mobile application** - The Polish trade forum elektroda.pl and industry portals (fotowoltaika-energia.pl, 2024-2025) document recurring complaints about the SolarView/SolarmanPV app - including intermittent data refresh failures and Wi-Fi stick configuration issues. Installers consistently rate FusionSolar (Huawei) and MyFronius as more mature and reliable platforms. ## About this series The SOFAR Solar SOFAR 15-24KTLX-G3 series are **three-phase grid-tie inverters** designed for small industrial and commercial installations, where stable operation, high operational reliability, and easy monitoring are key. These inverters feature two independent MPPTs - a practical solution when modules are distributed across two roof sections or operate under different sunlight conditions, as the inverter precisely selects the operating point, reducing losses during partial shading. In daily operation, high European efficiency is crucial, meaning significantly better energy yields under typical operating conditions in Poland, not just in a laboratory setting. The series also includes **Type II overvoltage protection on both the DC and AC sides**, enhancing the installation's resilience to storms and grid fluctuations. The comprehensive monitoring and remote software updates simplify management and maintenance, facilitating service. This is an excellent choice for investors seeking efficient inverters for commercial or business installations without complicating the system with energy storage. ## Questions ### What warranty does Sofar Solar offer on the SOFAR 15-24KTLX-G3 series? The standard warranty for inverters in the SOFAR 15-24KTLX-G3 series is 5 years. The manufacturer offers the option to purchase an extended warranty of up to 10 years, and in certain contractual arrangements up to 20 years. For commercial installations, securing extended coverage is highly advisable, as the inverter is the heart of the PV system and any failure results in the entire installation going offline. ### What power ratings are available in the SOFAR 15-24KTLX-G3 series, and how do I choose the right one? The series covers five power variants: 15, 17, 20, 22, and 24 kW. The choice depends primarily on the total installed panel capacity and the projected energy consumption of the facility. For a small manufacturing plant or office building with a system up to 80-100 kWp, a single 20-24 kW inverter is typically sufficient. It is advisable to consult a system designer to avoid oversizing or encountering grid connection limitations. ### What is the purpose of the two independent MPPTs in the SOFAR 15-24KTLX-G3, and when does it matter? Two independent MPPTs allow panels from two different roof sections or with different orientations (e.g., east-west) to be connected without mutual energy losses. Each tracker independently seeks its own optimal operating point, so shading on one string of panels does not reduce the output of the other. In practice, this translates into higher annual energy yields compared to a single-MPPT inverter. ### Are the SOFAR 15-24KTLX-G3 inverters compatible with modern 500 W and higher-power panels? Yes, the SOFAR 15-24KTLX-G3 series is designed to work with high-power modules rated at 500 W and above. Each MPPT tracker supports a maximum input current of 20 A, which accommodates the electrical parameters of the vast majority of large-format modules currently available on the market. The maximum DC input voltage is 1100 V, providing considerable flexibility when designing PV string configurations. ### How does monitoring work with the SOFAR 15-24KTLX-G3 inverter, and do I need an additional device? The inverter features a built-in Wi-Fi module that transmits data to the SolarmanPV platform. Simply connect it to the local home or business network, register the installation on the portal, and you will have access to production data via the mobile app or a web browser. Inverter firmware updates can also be performed remotely, eliminating the need for an on-site service visit. ### Does the SOFAR 15-24KTLX-G3 series operate in winter and at low temperatures? Yes, the operating temperature range is -30°C to +60°C, meaning the inverter starts up and operates reliably under typical Central European winter conditions. The IP65-rated enclosure protects against moisture and dust ingress, which is important for outdoor installations or unheated technical rooms. The high European efficiency of 98.2% also means the inverter performs well under the low-irradiance conditions characteristic of autumn and winter. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/1717057306269054304-28c64ce36015.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 | +0.4 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 | 3.0 kg heavier | | [Huawei SUN2000-17KTL-M2](https://comparepv.com/inverter/huawei-sun2000-17ktl-m2) | 17 kW | 98.3% | 2 | 25.0 kg | 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 | | [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 | | [Sungrow SG17RT](https://comparepv.com/inverter/sungrow-sg17rt) | 17 kW | 98.1% | 2 | 21.0 kg | 1.0 kg lighter | --- Source: https://comparepv.com/inverter/sofar-solar-sofar-17ktlx-g3