--- title: "GoodWe GW15K-SDT-CN-G40 Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "GoodWe GW15K-SDT-CN-G40 15 kW grid-tie inverter. Specs: 2 MPPT, 1100 V max DC input, 17.0 kg." source: "https://comparepv.com/inverter/goodwe-gw15k-sdt-cn-g40" updated: 2026-01-16 --- # GoodWe GW15K-SDT-CN-G40 ## Identity - **Manufacturer:** GoodWe - **Model:** GW15K-SDT-CN-G40 - **Series:** SDT G4 - **Rated AC power:** 15 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 | - | 98.0% | | | | MPPT trackers | 2 | 2 | Typical | 53 | | Max DC input voltage | 1100 V | 1000 V | Strong - top 21% | 1 | | Weight per kW | 1.1 | 1.6 | Strong - top 20% | 43 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 15 kW - **Max AC power:** 16.50 kW - **Max apparent power:** 16.50 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 380 V - **Max AC current:** 25.1 A - **Grid frequency:** 50 Hz - **Power factor:** ~1 (0.8 leading … 0.8 lagging adjustable) ### 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:** 21.0 A - **Max short-circuit current per MPPT:** 26.0 A ### Efficiency - **Max efficiency:** 98.6 % ### Physical - **Dimensions:** 413 × 530 × 211 mm - **Weight:** 17.0 kg - **Enclosure:** IP66 - **Cooling:** forced-air - **Noise:** 45 dB - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Bluetooth, Display - **Protocols:** RS485, 4G (optional/variant dependent), Bluetooth (optional/variant dependent) - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** NB/T 32004 (grid connection standard), NB/T 32004 (safety standard), NB/T 32004 (EMC standard) ### Pros - **Maximum efficiency of 98.7% - leading performance in the segment** - According to the ENF Solar SDT G4 datasheet, the series achieves a maximum efficiency of 98.6-98.7%, placing it among the top performers in the 15-33 kW class of string inverters. This exceeds the efficiency of products such as the SMA Sunny Tripower Core1 (~98.5%) and many Huawei SUN2000 models (~98.6%). Higher maximum efficiency directly translates to lower conversion losses under optimal solar conditions. - **IP66-rated protection - exceeding market standards** - The SDT G4 has an IP66 certification (full protection against dust and strong water jets), while most competing three-phase inverters (Fronius Symo, SMA STP) offer IP65. This difference is significant when installing in harsh weather conditions or near agricultural dust. - **BNEF Tier 1 forecast for Q2 2025 and 100 GW of global installed capacity** - GoodWe has been officially recognized by BloombergNEF as a Tier 1 inverter manufacturer in Q2 2025, confirming its bankability in projects with non-recourse financing. The cumulative installed capacity exceeds 100 GW globally (Q1 2025 data), making the brand one of the largest in the world and minimizing counterparty risk for long-term installations. - **AFCI option + SPD II surge protection** - The available arc fault detection (AFC) function responds with an alarm in the SEMS portal and by disconnecting the circuit - a requirement that is increasingly being demanded by insurers and fire codes. The built-in Class II surge protection reduces the number of external components in the DC enclosure. - **SEMS platform + local branch in Poland** - Remote monitoring via the SEMS portal (web browser and mobile app) with WiFi or Ethernet connectivity provides remote diagnostics without the need for on-site service visits. GoodWe has an office in Poland (Kalisz), which shortens the warranty service process compared to brands without a local presence. ### Cons - **Power range from 15 kW - excludes typical prosumers** - The SDT G4 series includes models ranging from 15-33 kW, which means it is not suitable for the dominant group of Polish prosumer installations (5-10 kW three-phase). Installers need to use SDT G2/G3 or DNS G4 series for smaller installations - SDT G4 specifically targets the small-commercial segment, rather than typical single-family homes. ## About this series The GoodWe SDT G4 series are three-phase grid-tie inverters designed for residential and small commercial installations, where reliable operation, high yield, and ease of use are essential. Thanks to **two independent MPPTs**, you can flexibly connect strings of modules with different orientations or partial shading, while the inverter continuously optimizes the point of maximum power, minimizing energy losses. The high **European efficiency** ensures significantly better real-world performance in typical operating conditions in Poland - not just in the lab, but also under varying weather and load conditions. The SDT G4 series also stands out for its focus on safety: features such as arc fault detection (AFCI) and surge protection are available, enhancing the overall system’s reliability. For daily monitoring of operation, **online monitoring via SEMS** and communication through **Wi-Fi or Ethernet** (depending on configuration) facilitate diagnostics and maintenance. This is the series for investors seeking refined automation, grid compliance, and a reliable manufacturer’s warranty. ## Questions ### What warranty does GoodWe offer on its SDT G4 inverters? GoodWe offers a standard 5-year manufacturer's warranty on SDT G4 series inverters. In the European Union, the United Kingdom, Switzerland, and Norway, this warranty can be automatically extended to 10 years if the inverter is installed by a certified GOODWE PLUS+ installer and the conditions specified in the warranty are met. GoodWe is a Tier-1 manufacturer, which confirms the company's financial stability and the feasibility of its warranty commitments. ### Can the GoodWe SDT G4 inverter handle partial shading of the panels effectively? Yes, thanks to its two independent MPPT (Maximum Power Point Tracking) inverters, the GoodWe SDT G4 can handle two separate strings of modules with different orientations or exposed to different levels of sunlight. Each MPPT input independently tracks the optimal operating point, which minimizes energy losses in the event of shading from one part of the roof, for example, by a chimney, skylight, or neighboring building. ### What is the actual performance of the GoodWe SDT G4 in Polish climatic conditions? The SDT G4 series achieves European-level efficiency, approximately 98.6-98.7%, which is calculated under varying loads and reflects typical conditions for the Central European climate. In practice, this means that the inverter maintains a high level of efficiency not only at full power, but also under low sunlight conditions, typical of Polish autumns and winters, which translates into a higher annual energy yield. ### What is the AFCI function in the GoodWe SDT G4 inverter, and is it truly necessary? AFCI (Arc Fault Circuit Interrupter) is an optional feature for detecting arc faults in DC installations. An arc can occur in a damaged MC4 connection, a frayed cable, or a faulty terminal, and is one of the main causes of fires in photovoltaic systems. The SDT G4 inverter, equipped with AFCI, monitors the DC circuit and, upon detecting any abnormalities, sends an alarm to the SEMS monitoring system, enabling quick response from the service team. ### How to monitor the performance of the GoodWe SDT G4 inverter in real-time? The GoodWe SDT G4 inverter integrates with the SEMS (Smart Energy Management System) platform, accessible via a web browser and a mobile application. Production data, alarms, and operating history are displayed in real-time. Connectivity to the internet is achieved through an integrated WiFi or Ethernet module, depending on the device configuration. The SEMS platform also enables remote diagnostics and software updates. ### Which types of installations are suitable for the GoodWe SDT G4 series, and who would benefit from choosing this product? The SDT G4 series includes three-phase grid-connected inverters with a power range of 15 to 33 kW, making it suitable for both residential and small commercial installations, such as offices, warehouses, and agricultural agrivoltaic systems, where a three-phase network connection is available. This is a good choice for investors who prioritize a reputable Tier-1 brand, straightforward monitoring, and compliance with the requirements of distribution network operators in Poland. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/gw-sdt-g4-15-33kw-cbdef01dbc48.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Growatt MID 15KTL3-X](https://comparepv.com/inverter/growatt-mid-15ktl3-x) | 15 kW | 98.6% | 2 | 23.0 kg | 6.0 kg heavier | | [Sungrow SG15KTL-M](https://comparepv.com/inverter/sungrow-sg15ktl-m) | 15 kW | 98.3% | 2 | 24.0 kg | 7.0 kg heavier | | [Huawei SUN2000-15KTL-M2](https://comparepv.com/inverter/huawei-sun2000-15ktl-m2) | 15 kW | 98.3% | 2 | 25.0 kg | 8.0 kg heavier | | [Huawei SUN2000-15KTL-M0](https://comparepv.com/inverter/huawei-sun2000-15ktl-m0) | 15 kW | 98.3% | 2 | 25.0 kg | 8.0 kg heavier | | [Growatt MOD 15KTL3-X](https://comparepv.com/inverter/growatt-mod-15ktl3-x) | 15 kW | 98.2% | 2 | 16.0 kg | 1.0 kg lighter | | [Growatt MOD 15KTL3-X2(Pro)](https://comparepv.com/inverter/growatt-mod-15ktl3-x2-pro) | 15 kW | 98.2% | 2 | 15.6 kg | 1.4 kg lighter | | [SOFAR 15KTLX-G3](https://comparepv.com/inverter/sofar-solar-sofar-15ktlx-g3) | 15 kW | 98.2% | 2 | 20.0 kg | 3.0 kg heavier | | [Fronius Verto 15.0](https://comparepv.com/inverter/fronius-international-fronius-verto-15-0) | 15 kW | 98.2% | 4 | 35.2 kg | +2 MPPT, 18.2 kg heavier | --- Source: https://comparepv.com/inverter/goodwe-gw15k-sdt-cn-g40