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.
Ranking
Specifications
Pros and cons
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.
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.
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.
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.
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.
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.
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.
Alternatives
About the SUN-K-G-LV series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.