--- title: "Deye SUN-25K-G02 Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Deye SUN-25K-G02 25 kW grid-tie inverter. Specs: 97.8% European efficiency, 2 MPPT, 1000 V max DC input, 28.0 kg." source: "https://comparepv.com/inverter/deye-sun-25k-g02" updated: 2026-01-17 --- # Deye SUN-25K-G02 ## Identity - **Manufacturer:** Deye - **Model:** SUN-25K-G02 - **Series:** SUN-K-G02 - **Rated AC power:** 25 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 | 97.8% | 98.0% | Typical | 109 | | MPPT trackers | 2 | 2 | Typical | 53 | | Max DC input voltage | 1000 V | 1000 V | Typical | 101 | | Weight per kW | 1.1 | 1.6 | Strong - top 19% | 42 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 25 kW - **Max AC power:** 27.50 kW - **Phases:** Three-phase - **Nominal AC voltage:** 400 V - **Max AC current:** 39.9 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading to 0.8 lagging - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC input power:** 32.50 kW - **Max DC voltage:** 1000 V - **MPPT voltage range:** 200 to 850 V - **Start-up voltage:** 250 V - **MPPT trackers:** 2 ### Efficiency - **European efficiency:** 97.8 % - **Max efficiency:** 98.6 % ### Physical - **Dimensions:** 520 × 400 × 240 mm - **Weight:** 28.0 kg - **Enclosure:** IP65 - **Cooling:** forced-air - **Noise:** 45 dB - **Operating temperature:** -25 to 65 °C - **Max humidity:** 100 % - **Max altitude:** 2000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Ethernet, Display - **Protocols:** RS485, RS232, WiFi, LAN - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** EN50549, IEC61727, VDE 0126-1-1, IEC62109-1, IEC62109-2, EN61000-6-1, EN61000-6-3 ### Pros - **Two independent MPPT (Maximum Power Point Tracking) systems** - Two independent MPPT (Maximum Power Point Tracking) systems allow for separate optimization of the performance of each panel or group of panels with different orientations. In practice, this reduces energy losses compared to single-phase inverters with a single MPPT, which were the standard in the prosumer segment before 2021. - **European efficiency ~97.6%** - European efficiency (weighted according to EN 50530, reflecting real solar irradiance conditions) at approximately 97.6% places the series in the upper half of the segment of single-phase grid-connected inverters for prosumer applications, which directly translates into a higher annual energy yield compared to models with efficiency of approximately 96-96.5%. - **VSG and zero-export as a standard** - The integrated Virtual Synchronous Generator (VSG) modes and export limitations to the grid meet the requirements of distribution network operators in the EU without the need to purchase additional modules. The series is ready for typical grid connection conditions for prosumer installations in Poland and other EU countries. - **Tier 1 producer according to S&P Global** - Deye was included in the inaugural list of Tier 1 Cleantech Companies by S&P Global Commodity Insights, which confirms the stability of its supply chain, the availability of spare parts, and a long-term warranty - all of which are crucial for a 5-year warranty and planned operation exceeding 20 years. - **Flexible monitoring: WiFi, LAN, mobile** - The series offers various communication options (WiFi, LAN, optional modules) with support for the SolarmanPV mobile application, allowing installers and users to perform real-time diagnostics and remote access - without the need to purchase a dedicated logger from a specific brand. ### Cons - **Older generation (released in 2021)** - The G02 series was first introduced in 2021 and has been superseded by newer Deye generations - G04 and G05 - which offer features such as higher individual power outputs, expanded interfaces, and updated firmware. When installing a new system in 2026, it is necessary to verify the availability of G02 components and to consider the possibility of updating the software for the G02. ## About this series The Deye SUN-K-G02 series are **single-phase grid-tie inverters** designed for stable operation in residential and small commercial installations, where high operational reliability and easy diagnostics are key. They feature **two independent MPPTs**, which facilitate better performance under shading, different roof orientations, or when modules are divided into two strings - the inverter intelligently selects the operating point for each string, minimizing energy losses. In practice, this is aided by **high European efficiency**, meaning genuinely excellent performance under typical operating conditions, translating to higher annual yields, not just in laboratory tests. The series supports essential features for modern grid connections, including export limitation functionality and grid-supporting modes (VSG). Flexible communication and monitoring options are available for installation control - including WiFi, LAN, and mobile solutions, also with optional modules. The entire package is complemented by required European certifications and a **5-year warranty**, making this series a sensible choice for installers and users seeking predictable operation. ## Questions ### What is the warranty on the Deye SUN-K-G02 inverters? The Deye SUN-K-G02 series is covered by a 5-year manufacturer's warranty for material and manufacturing defects. Deye offers the option to extend the warranty to 10 or 12 years for an additional fee, which is worth considering when planning the long-term operation of the system. This warranty is valid if the system is installed by a qualified installer and used in accordance with the device's technical documentation. ### What power levels are suitable for the Deye SUN-K-G02 series, and would it be suitable for a typical single-family home? The SUN-K-G02 series includes single-phase grid-tie inverters with power ratings ranging from 3.6 kW to 10.5 kW, which corresponds to typical prosumer installations in single-family homes. It is suitable in any location where a single-phase connection is available and the planned solar panel capacity does not exceed a few kilowatts. For power levels above 10.5 kW or a three-phase connection, a different series of Deye inverters should be selected. ### What are the benefits of having two independent MPPT (Maximum Power Point Tracking) controllers in the Deye SUN-K-G02 inverter, and when is this important? Two independent MPPT (Maximum Power Point Tracking) controllers allow you to connect panels from two separate roof sections or rows with different orientations and angles. Each string operates independently, so shading or different sun exposure on one section does not reduce the output of the other. This is particularly important for roofs divided by a chimney, skylight, or when panels are facing both south and west. ### Does the Deye SUN-K-G02 inverter support export limitations to the grid? Yes, the Deye SUN-K-G02 series supports the export limitation function, including the zero export mode. When combined with the inverter's energy meter, the inverter continuously adjusts the output power to match the actual consumption within the building, preventing exceeding the reverse power limit set by the grid operator. This is increasingly becoming a required condition for obtaining connection permits for new prosumer installations. ### How can I monitor the performance of the Deye SUN-K-G02 inverter in real-time? The Deye SUN-K-G02 series offers monitoring via WiFi or LAN using the SolarmanPV mobile app and a web panel. Users have access to real-time data on production, performance, and alarms, as well as historical data. For installations that require integration with external energy management systems, an RS485 interface is available, along with optional communication modules that can be purchased separately. ### What is the VSG mode in the Deye SUN-K-G02 inverter, and is it a feature that the average user needs? The VSG (Virtual Synchronous Generator) mode allows the inverter to actively support the stabilization of frequency and voltage in the grid, behaving similarly to a conventional synchronous generator. For a typical residential installation with a strong connection, its impact is limited, but it becomes significant in weak rural grids or when the operator requires active grid support. This feature aligns with the increasing requirements of grid operators towards new inverters. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/9456059580e04a75-a008f51b4938.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Growatt MID 25KTL3-X2 (Pro.E)](https://comparepv.com/inverter/growatt-mid-25ktl3-x2-pro-e) | 25 kW | 98.6% | 3 | 24.0 kg | +0.8 pp efficiency, +1 MPPT, 4.0 kg lighter | | [Growatt MID 25KTL3-X](https://comparepv.com/inverter/growatt-mid-25ktl3-x) | 25 kW | 98.6% | 2 | 23.0 kg | +0.8 pp efficiency, 5.0 kg lighter | | [Growatt MID 25KTL3-X1](https://comparepv.com/inverter/growatt-mid-25ktl3-x1) | 25 kW | 98.5% | | 29.5 kg | +0.7 pp efficiency, 1.5 kg heavier | | [GoodWe GW25K-MT](https://comparepv.com/inverter/goodwe-gw25k-mt) | 25 kW | 98.4% | | 40.0 kg | +0.6 pp efficiency, 12.0 kg heavier | | [Fronius Verto 25.0 400](https://comparepv.com/inverter/fronius-international-fronius-verto-25-0-400) | 25 kW | 98.3% | 4 | 35.2 kg | +0.5 pp efficiency, +2 MPPT, 7.2 kg heavier | | [Sungrow SG25T-P2-CN](https://comparepv.com/inverter/sungrow-sg25t-p2-cn) | 25 kW | 98.3% | 2 | 19.0 kg | +0.5 pp efficiency, 9.0 kg lighter | | [Huawei SUN2000-25KTL-M5](https://comparepv.com/inverter/huawei-sun2000-25ktl-m5) | 25 kW | 98.2% | 2 | 21.0 kg | +0.4 pp efficiency, 7.0 kg lighter | | [SOFAR 25KTLX-G3](https://comparepv.com/inverter/sofar-solar-sofar-25ktlx-g3) | 25 kW | 98.2% | | 36.0 kg | +0.4 pp efficiency, 8.0 kg heavier | --- Source: https://comparepv.com/inverter/deye-sun-25k-g02