--- title: "Deye SUN-45K-G-LV Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Deye SUN-45K-G-LV 45 kW grid-tie inverter. Specs: 98.3% European efficiency, 4 MPPT, 800 V max DC input, 60.0 kg." source: "https://comparepv.com/inverter/deye-sun-45k-g-lv" updated: 2026-01-17 --- # Deye SUN-45K-G-LV ## Identity - **Manufacturer:** Deye - **Model:** SUN-45K-G-LV - **Series:** SUN-K-G-LV - **Rated AC power:** 45 kW - **Type:** Grid-tie - **Phases:** Three-phase ## How it compares Compared against 243 inverters from 30 to 100 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | 98.3% | 98.2% | Typical | 39 | | MPPT trackers | 4 | 4 | Typical | 34 | | Max DC input voltage | 800 V | 1100 V | Weak - bottom 3% | 216 | | Weight per kW | 1.3 | 1.1 | Typical | 154 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 45 kW - **Max AC power:** 49.50 kW - **Phases:** Three-phase - **Nominal AC voltage:** 220 V - **Max AC current:** 129.9 A - **Grid frequency:** 60 Hz - **Power factor:** 0.8 leading to 0.8 lagging - **Harmonic distortion (THD):** 2.0 % ### PV input - **Max DC input power:** 58.50 kW - **Max DC voltage:** 800 V - **MPPT voltage range:** 200 to 700 V - **Start-up voltage:** 250 V - **MPPT trackers:** 4 - **Max input current per MPPT:** 40.0 A ### Efficiency - **European efficiency:** 98.3 % - **Max efficiency:** 98.7 % ### Physical - **Dimensions:** 575 × 700 × 297 mm - **Weight:** 60.0 kg - **Enclosure:** IP65 - **Cooling:** forced-air - **Noise:** 55 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 - **European efficiency ~98.2%, maximum 98.6%** - The models in the SUN-K-G-LV series achieve a maximum efficiency of up to 98.6% (e.g., G05-LV, G04-LV) and an European efficiency of approximately 98.2%, placing them on a level comparable to Sungrow and Huawei SUN2000 (maximum 98.6%). For Polish climatic conditions, the high European efficiency directly translates into better annual yields, especially when operating below peak power. - **Multi-string MPPT, 200-850 V DC range** - The series offers standalone MPPT trackers with a wide input voltage range of 200-850 V DC, as well as a low starting voltage of just 250 V. This allows for the flexible design of strings of various lengths, orientations, and angles, which is a significant advantage in installations with partial shading or on multi-pitched roofs. - **IP65 rating and natural cooling (available in select models)** - The IP65-rated enclosure provides protection against dust and water ingress, enabling outdoor mounting without the need for additional shielding. Some models in the series utilize passive cooling (without a fan), which eliminates moving parts and reduces the risk of mechanical failures over the long term. - **10-year warranty with service available in Poland** - Deye offers a 10-year limited warranty for the European market. In Poland, an authorized service center is available (Warsaw, Aleje Jerozolimskie 212, tel. +48 512 008 008), which reduces response times compared to manufacturers without local support. - **S&P Global Tier 1 rating, presence in over 140 countries** - Deye has achieved Tier 1 Cleantech certification from S&P Global Commodity Insights - an award based on market share, production scale, and financial health. Global sales exceeding 600,000 hybrid inverters (by 2024) and distribution in over 140 countries demonstrate the company's established position and the continuity of its supply chain for spare parts. ### Cons - **Partial warranty in the second five-year period** - During the 6-10 year warranty period, coverage is limited to components only, excluding labor costs and the replacement of the fan and LCD display. Competitors in the premium segment (e.g., SMA, selected Sungrow lines) offer full labor coverage throughout the warranty period, which, in the event of failure after 8 years of operation, actually increases the total cost of ownership (TCO) for the investor. - **A lower market ranking compared to Huawei and Sungrow.** - According to a Wood Mackenzie report (January 2026), Huawei and Sungrow are tied for first place with scores of 93.9 and 93.7 points, respectively. Deye does not appear in the top tier of this ranking, which could be significant in corporate tenders or projects requiring an inverter with documented top-3 market share. ## About this series The Deye SUN-K-G-LV series are **three-phase grid-tie inverters** designed for installations where stable grid operation and high annual energy yield are key. Their main advantage is the **multi-string MPPT systems**, enabling independent management of multiple module strings - making it easier to optimize production under partial shading, different roof orientations, or mixed string lengths in a single installation. High **European efficiency** means better performance in real climatic conditions, i.e., when the installation operates most of the time below its peak power - translating to more predictable energy gains in Polish conditions. The series supports **monitoring and remote diagnostics** via popular communication interfaces (depending on configuration, including WiFi, Ethernet), facilitating maintenance and operational control within the application. Its enhanced resistance to external conditions, comprehensive safety features, compliance with grid connection requirements, and standard manufacturer's warranty make it an excellent choice for larger residential, commercial, and small-scale industrial installations. ## Questions ### How many independent MPPT strings does the Deye SUN-K-G-LV inverter have, and what does this mean for my system? The number of MPPT (Maximum Power Point Tracking) strings depends on the model: smaller versions (10-21 kW) are equipped with 2 independent MPPT trackers, while larger models in the range of 35-50 kW have 4 MPPT strings. Each string operates independently, allowing you to connect panels from different orientations or with different orientations without incurring any losses. This is particularly important in installations with partial shading or mixed string configurations. ### What is the maximum efficiency of Deye SUN-K-G-LV inverters, and what does "European efficiency" mean? The maximum efficiency of models in the SUN-K-G-LV series reaches 98.6-98.7%. The European efficiency (weighted) is more reliable than peak efficiency, as it takes into account real operating conditions - cloudy days, low sunlight, and fluctuating power. In the Polish climate, where the installation typically operates below its peak, high European efficiency directly translates into higher annual energy yields. ### What is the warranty on Deye SUN-K-G-LV inverters, and what does it cover? The standard manufacturer's warranty is 5 years, with the option to extend it to 10 years. The initial 5-year warranty covers all components, including labor. The extended 10-year warranty covers spare parts, but the costs of service transportation and labor may be excluded. It is advisable to confirm the exact terms with a Polish distributor, as they may vary slightly depending on the agreement. ### Can the Deye SUN-K-G-LV inverter be monitored remotely using a mobile app? Yes, the SUN-K-G-LV series supports remote monitoring via the SolarmanPV platform or a dedicated Deye application. The device communicates via WiFi, Ethernet, or RS485 - depending on the model's configuration and features. Data on energy production, performance, and any alarms is available in real-time on a smartphone or computer, which significantly simplifies maintenance and ongoing monitoring of the system. ### Does the Deye SUN-K-G-LV inverter function properly in winter, and will it perform well in the Polish climate? Yes, the SUN-K-G-LV series is designed to operate in temperatures ranging from -25°C to +65°C, and the enclosure has an IP65 protection rating, making it resistant to rain, humidity, and dust. The cold winters and hot summers in Poland fall within this range without any issues. The device maintains full functionality throughout the year, which is important for outdoor installations. ### Which type of installation is the Deye SUN-K-G-LV series best suited for: residential or commercial? The SUN-K-G-LV series are three-phase grid-tie inverters, available in power ranges from 10 to 50 kW. The smaller models (10-21 kW) are suitable for large prosumer installations or small businesses, while the 35-50 kW models are designed for commercial and small industrial applications. Important: this is a purely grid-tied inverter without an integrated energy storage system - it operates only when connected to an active power grid. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/43060596342dccf2-95aab78f0ee8.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [SOFAR 45KTLX-G3](https://comparepv.com/inverter/sofar-solar-sofar-45ktlx-g3) | 45 kW | 98.2% | | 37.0 kg | 23.0 kg lighter | | [Deye SUN-45K-G03](https://comparepv.com/inverter/deye-sun-45k-g03) | 45 kW | 98.0% | 4 | 44.5 kg | 15.5 kg lighter | | [Huawei SUN2000-50KTL-JPM0](https://comparepv.com/inverter/huawei-sun2000-50ktl-jpm0) | 50 kW | 98.6% | 6 | 71.0 kg | +5.0 kW, +2 MPPT, 11.0 kg heavier | | [Growatt MID 40KTL3-X](https://comparepv.com/inverter/growatt-mid-40ktl3-x) | 40 kW | 98.5% | | 30.5 kg | -5.0 kW, 29.5 kg lighter | | [Huawei SUN2000-50KTL-M0](https://comparepv.com/inverter/huawei-sun2000-50ktl-m0) | 50 kW | 98.5% | 6 | 74.0 kg | +5.0 kW, +2 MPPT, 14.0 kg heavier | | [Solis-50K-HV](https://comparepv.com/inverter/ginlong-solis-solis-50k-hv) | 50 kW | 98.5% | 4 | 61.0 kg | +5.0 kW, 1.0 kg heavier | | [Growatt MAX 50KTL3 LV](https://comparepv.com/inverter/growatt-max-50ktl3-lv) | 50 kW | 98.4% | | 82.0 kg | +5.0 kW, 22.0 kg heavier | | [Sungrow SG50CX](https://comparepv.com/inverter/sungrow-sg50cx) | 50 kW | 98.4% | | 62.0 kg | +5.0 kW, 2.0 kg heavier | --- Source: https://comparepv.com/inverter/deye-sun-45k-g-lv