--- title: "Solis-3P8K-4G Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Solis-3P8K-4G 8 kW grid-tie inverter. Specs: 97.8% European efficiency, 2 MPPT, 1000 V max DC input, 18.0 kg." source: "https://comparepv.com/inverter/ginlong-solis-solis-3p8k-4g" updated: 2026-01-17 --- # Solis-3P8K-4G ## Identity - **Manufacturer:** Ginlong Solis - **Model:** Solis-3P8K-4G - **Series:** Solis-3P-K-4G - **Rated AC power:** 8 kW - **Type:** Grid-tie - **Phases:** Three-phase ## How it compares Compared against 266 inverters from 6 to 12 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | 97.8% | 97.6% | Typical | 64 | | MPPT trackers | 2 | 2 | Typical | 46 | | Max DC input voltage | 1000 V | 1000 V | Typical | 59 | | Weight per kW | 2.2 | 2.3 | Typical | 121 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 8 kW - **Max AC power:** 8.80 kW - **Max apparent power:** 8.80 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 400 V - **Max AC current:** 12.7 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading - 0.8 lagging - **Harmonic distortion (THD):** 1.5 % ### PV input - **Max DC input power:** 9.60 kW - **Max DC voltage:** 1000 V - **MPPT voltage range:** 160 to 850 V - **Start-up voltage:** 180 V - **MPPT trackers:** 2 ### Efficiency - **European efficiency:** 97.8 % - **Max efficiency:** 98.3 % ### Physical - **Dimensions:** 563 × 310 × 219 mm - **Weight:** 18.0 kg - **Enclosure:** IP65 - **Operating temperature:** -25 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Display - **Protocols:** RS485, Wi-Fi (optional), GPRS (optional) - **Protection:** AFCI, DC switch, Surge protection ### Warranty and certificates - **Certifications:** VDE-AR-N 4105, VDE V 0124, VDE V 0126-1-1, UTE C15-712-1, NRS 097-1-2, G98, G99, EN 50549-1, EN 50549-2, RD 1699, UNE 206006, UNE 206007-1, IEC 61727, IEC 62109-1, IEC 62109-2, IEC 62116, EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4 ### Pros - **Natural cooling without a fan** - The 3P-K-4G series utilizes passive natural convection cooling without a fan, which eliminates moving parts that are prone to wear and tear. This directly translates to a longer device lifespan and a lower noise level (\<40 dB) compared to inverters with active cooling (e.g., older Huawei SUN2000 models). - **Dual MPPT, 160-850 V range** - Two independent MPPT (Maximum Power Point Tracking) systems with a wide voltage range of 160-850 V allow for the efficient operation of installations with various orientations and lengths of strings, as well as partial shading. The starting voltage of 160 V allows for earlier operation even under low morning sunlight. - **Maximum efficiency of 98.7%, THDi \< 1.5%** - With a maximum efficiency of 98.7%, the inverter occupies the upper quartile of the three-phase segment (the market median for the 3-20 kW class is approximately 98.0-98.5%). The low Total Harmonic Distortion (THDi) of less than 1.5% meets the stringent requirements of grid operators, facilitating the connection of the facility. - **Tier 1 BNEF manufacturer, starting in 2024** - Ginlong (Solis) Technologies maintains Tier 1 status according to BloombergNEF (verified for Q1 2025), which signifies recognized bankability - a requirement for external financing of PV installations and leasing. The company, established in 2005, is listed on the Shanghai Stock Exchange, further confirming its financial stability. - **IP65 protection level + no-transformer design** - The IP65 enclosure provides complete protection against dust and water jets, allowing for outdoor mounting without additional covers. The design without a transformer reduces the device's weight and improves energy efficiency compared to inverters with galvanic isolation transformers. ### Cons - **The standard warranty is only 5 years.** - In standard, the manufacturer offers a 5-year factory warranty - significantly shorter than Fronius (10 years standard for Primo/Symo) or SolarEdge (12 years for HD-Wave models). An extension to 10 or 15 years is available for an additional fee, which increases the overall cost of owning the installation. - **WiFi and GPRS are only available as optional features.** - RS485 communication is built-in, while WiFi and GPRS require the purchase of an additional communication module. Competitors (e.g., Huawei SUN2000, Fronius Symo Advanced) integrate WiFi as standard, which simplifies remote monitoring without incurring additional costs. - **The 4G series represents the previous generation.** - Ginlong actively promotes its new 5G product line (enhanced performance and expanded Smart Energy features). Some models from the 3P-K-4G range (including Solis-3P(12-20)K-4G), are no longer being produced by ENF Solar, which could limit the availability of replacement parts and software updates over a 10-15-year lifespan. ## About this series The Ginlong Solis Solis-3P-K-4G series is a **three-phase grid-tie inverter** designed for operation in PV installations connected to the grid - from single-family homes to small commercial properties. What sets it apart is its **2 MPPT architecture**, enabling independent management of two string inputs. This offers a real benefit from different roof orientations, varying string lengths, and partial shading, as each string independently tracks its own maximum power point. In practice, this translates to better energy yield in typical, non-ideal installation conditions. High **European efficiency** means the inverter operates effectively not only under laboratory conditions but also in variable loads typical of the Polish climate. You also benefit from **robust protection features**, integrated grid protection functions, and an enclosure designed for outdoor mounting. Monitoring is done via RS485, and with optional modules, also via WiFi or GPRS - with data viewing in the app. This is the series for those seeking reliable performance, convenient diagnostics, and a long warranty. ## Questions ### What is the warranty on the Solis-3P-K-4G inverters? The standard manufacturer's warranty for the Solis-3P-K-4G series is 5 years. However, Ginlong Solis offers the option to purchase an extended warranty within 12 months of purchase - with options for extending the warranty to 10, 12, or 15 years in total. This option is particularly cost-effective for commercial installations, where continuous operation directly translates to a return on investment. ### What advantages does the 2 MPPT system in the Solis-3P-K-4G inverter offer, and when is it truly beneficial? Two independent MPPT (Maximum Power Point Tracking) inputs allow you to connect two separate strings of panels, each of which is independently tracked for its maximum power point. In practice, this is very important when a roof is divided into two orientations (e.g., south and east), or when one string is partially shaded by a chimney or skylight. Without 2 MPPT, the weaker string would reduce the overall output of the entire system. ### Will the Solis-3P-K-4G inverter perform well in the Polish climate - how will it handle freezing temperatures and heat? The Solis-3P-K-4G series operates within a temperature range of -25°C to +60°C, so it can easily withstand Polish winters without the risk of damage. The IP65-rated enclosure protects against rain and dust, which is important for outdoor installations. Its high European efficiency, which is closer to real-world conditions than laboratory settings, also means good performance under the variable cloud cover typical of Poland. ### How can I monitor the performance of the Solis-3P-K-4G inverter, and do I need any additional equipment? The inverter is standardly equipped with an RS485 interface, which allows connection to a wired monitoring system. If you prefer remote viewing via a mobile app, an optional WiFi or GPRS module is required. Once installed, production data is displayed in real-time within the SolisCloud app. Communication modules are inexpensive accessories available from Solis distributors. ### What is the maximum power rating of the Solis-3P-K-4G solar panel system? The Solis-3P-K-4G series includes models with output power ranging from 3 to 20 kW, making it suitable for both larger single-family homes and small commercial or agricultural facilities. The three-phase nature of the inverter means that it requires a three-phase connection - this is a standard solution in new buildings and businesses, but it is not suitable for typical single-phase residential connections. ### Are Solis-3P-K-4G inverters still available for purchase? The Solis-3P-K-4G series is an older generation (4G) product and is no longer actively produced by Ginlong Solis. The manufacturer has replaced it with newer platforms. Some distributors may still have existing stock, but when installing new inverters, it is advisable to consider the latest generation of Solis inverters, which offer more advanced features and comprehensive service support for many years. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/5f59bd760dee8-8e440d64bff6.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Growatt MOD 8000TL3-X](https://comparepv.com/inverter/growatt-mod-8000tl3-x) | 8 kW | 98.1% | 2 | 14.0 kg | 4.0 kg lighter | | [Growatt MOD 8KTL3-X2(Pro)](https://comparepv.com/inverter/growatt-mod-8ktl3-x2-pro) | 8 kW | 98.1% | 2 | 14.6 kg | 3.4 kg lighter | | [Sungrow SG8.0RT-20](https://comparepv.com/inverter/sungrow-sg8-0rt-20) | 8 kW | 98.0% | 2 | 17.0 kg | 1.0 kg lighter | | [GoodWe GW8000-DT](https://comparepv.com/inverter/goodwe-gw8000-dt) | 8 kW | 98.0% | 2 | 24.0 kg | 6.0 kg heavier | | [Ginlong Solis S6-GR3P-8K02-NV-ND](https://comparepv.com/inverter/ginlong-solis-s6-gr3p-8k02-nv-nd) | 8 kW | 97.9% | 2 | 15.4 kg | 2.6 kg lighter | | [Sungrow SG6.0RT](https://comparepv.com/inverter/sungrow-sg6-0rt) | 8 kW | 97.8% | 2 | 18.0 kg | Similar on paper | | [Sungrow SG8.0RT-P2](https://comparepv.com/inverter/sungrow-sg8-0rt-p2) | 8 kW | 97.7% | 2 | 18.0 kg | Similar on paper | | [SMA Solar STP8.0-3AV-40](https://comparepv.com/inverter/sma-solar-stp8-0-3av-40) | 8 kW | 97.7% | 2 | 20.5 kg | 2.5 kg heavier | --- Source: https://comparepv.com/inverter/ginlong-solis-solis-3p8k-4g