--- title: "Growatt MAX 125KTL3-X2 MV Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Growatt MAX 125KTL3-X2 MV 125 kW grid-tie inverter. Specs: 8 MPPT, 1100 V max DC input, 84.0 kg, 5 yrs warranty." source: "https://comparepv.com/inverter/growatt-max-125ktl3-x2-mv" updated: 2026-01-16 --- # Growatt MAX 125KTL3-X2 MV ## Identity - **Manufacturer:** Growatt - **Model:** MAX 125KTL3-X2 MV - **Series:** MAX KTL3-X2 - **Rated AC power:** 125 kW - **Type:** Grid-tie - **Phases:** Three-phase ## How it compares Compared against 95 inverters from 100 to 500 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | - | 98.6% | | | | MPPT trackers | 8 | 10 | Typical | 44 | | Max DC input voltage | 1100 V | 1100 V | Typical | 47 | | Weight per kW | 0.7 | 0.6 | Typical | 61 | | Warranty | 5 yrs | 5 yrs | Typical | 2 | ## Specification ### AC output - **Rated AC power:** 125 kW - **Max apparent power:** 137.50 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 480 V - **Max AC current:** 165.4 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading ... 0.8 lagging (adjustable) - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC voltage:** 1100 V - **MPPT voltage range:** 180 to 1000 V - **Start-up voltage:** 195 V - **MPPT trackers:** 8 - **Max input current per MPPT:** 45.0 A - **Max short-circuit current per MPPT:** 56.5 A ### Efficiency - **Max efficiency:** 99.0 % ### Physical - **Dimensions:** 640 × 970 × 345 mm - **Weight:** 84.0 kg - **Enclosure:** IP66 - **Cooling:** forced-air - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Display - **Protocols:** USB, RS485, WiFi, GPRS, 4G, PLC - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Warranty:** 5 years - **Certifications:** EN 61000-3, EN 61000-6, EN/IEC 62109-1, EN/IEC 62109-2, IEC 60529, NB/T 32004-2018, CGC/GF 035-2013, GB/T 19964-2012 ### Pros - **Support for up to 8 independent MPPT (Maximum Power Point Tracking) systems** - The MAX KTL3-X2 series offers up to 8 MPPT trackers with a claimed tracking efficiency of 99.9%, which exceeds the typical standard for the C&I segment (4-6 MPPT). This allows for the design of string configurations with different azimuths and tilt angles without significant mismatch losses, which is crucial for roof-mounted and ground-mounted installations with irregular geometries. - **Peak efficiency: 98.8%** - The datasheet confirms a maximum efficiency of 98.8%, placing the series in the top quartile of C&I 100-150 kW class competitors. In Polish conditions (diffuse solar radiation), high efficiency at partial load translates into a significantly higher annual yield than would be indicated by the nominal power alone. - **IP66 rating + operating temperature range from -30°C to +60°C** - The IP66 level of protection and the extended operating temperature range (-30°C to +60°C) allow for installation without an additional enclosure, even in Polish winter conditions, without the risk of condensation and corrosion, thereby reducing both initial and ongoing installation costs. - **Dual SPD Type II + I/V diagnostics** - Built-in Type II surge protection devices on both the DC and AC sides, along with the intelligent I/V scan and diagnosis function, allow for the detection of string degradation or module failure without the need for a service visit. In 100-150 kW installations, this reduces the average diagnostic time by several working hours per year. - **10-year warranty and service network in Poland** - The standard warranty for the MAX series is 10 years, which is equivalent to the premium warranty offered in the C&I segment. Several authorized distributors operate in Poland (including MP Solar Group and Ruda Śląska), which reduces the risk of prolonged downtime in the event of inverter failure. ### Cons - **Status: Not Bankable** - Growatt does not appear on the BloombergNEF Tier 1 Bankable Inverter Manufacturers list (context: tier\_1\_bankable: false). For projects financed with non-recourse debt or with a bank guarantee, this may require additional agreements with the financing institution or may prevent qualification without an alternative guarantee. - **A higher failure rate than the premium rate.** - Independent analyses assess the failure rate of current Growatt models at 2-5%, while premium brands (SMA, Fronius) achieve rates of 1-3%. For 100-150 kW installations, this difference could statistically translate to a higher number of service interventions over a 10-year lifespan. - **A brief overview of the producer's track record** - Growatt has been operating since 2010 (15 years), while the leaders in the industrial segment - SMA (since 1981) and Fronius (since 1945) - have a significantly longer documented track record of reliability. For investors with a long-term perspective (20-25 years), this represents an additional risk factor when assessing the continuity of after-sales support. ## About this series The Growatt MAX KTL3-X2 series are three-phase grid-tie inverters designed for commercial and industrial installations, where stable operation, safety, and fast diagnostics are key. They feature multi-channel MPPT, which simplifies the design of PV fields with different orientations and helps minimize losses due to partial shading - instead of pulling down the entire string, the system better adapts the operating point to conditions on the roof or ground. In practice, this translates to more predictable energy yields throughout the day. High European efficiency means better performance in typical operating conditions in Poland, not just in laboratory scenarios - truly supporting annual energy maximization. Plus, monitoring and communication via Shine modules (WiFi, Ethernet, or 4G) are available, with monitoring in the app and convenient remote service. The series offers advanced protections (including II-type overvoltage protection on both DC and AC sides) and an IP66 rating, making installation easier in demanding environments. This is an excellent choice for companies seeking reliable operation and cost-effective O&M control. ## Questions ### How many MPPT trackers does the Growatt MAX KTL3-X2 inverter have, and why does this matter for commercial installations? The Growatt MAX KTL3-X2 series features up to 8 independent MPPT trackers. This allows strings with different orientations and tilt angles to be connected without significant energy losses. In commercial installations where some panels may be shaded by chimneys, HVAC units, or adjacent buildings, multi-channel MPPT tracking mitigates the drag effect that, in older single-MPPT designs, could reduce overall yield by as much as ten to fifteen percent. ### What is the warranty coverage for the Growatt MAX KTL3-X2 inverter? The standard manufacturer's warranty for the Growatt MAX KTL3-X2 series is 5 years. Growatt offers the option to extend this to 10 years through its extended warranty program. In Poland, warranty service is handled by authorized distributors; according to Growatt Poland, the target response time for device replacement is approximately 5 business days. ### What is the real-world efficiency of the Growatt MAX KTL3-X2 operating under Polish climate conditions? The peak efficiency of the MAX KTL3-X2 series exceeds 98.4%; however, for assessing financial viability under Polish climate conditions, the weighted European Efficiency (Euro Eta) is a more relevant metric, as it accounts for variable irradiance levels throughout the day and year. Growatt reports a high European Efficiency rating for this series, which in practice translates to lower conversion losses during the low-irradiance conditions typical of autumn and winter in Poland. ### Does the Growatt MAX KTL3-X2 support remote monitoring, and how does it work? Yes, the inverter is compatible with Shine communication modules, available in WiFi, Ethernet, and 4G variants. Generation data is accessible in real time via the ShinePhone mobile app and the ShineServer web platform. Installers can remotely read operating parameters, diagnose faults, and update firmware without dispatching a technician to the site, which significantly reduces O&M costs in large commercial installations. ### What protection features does the Growatt MAX KTL3-X2 offer, and does it meet the requirements for industrial installations? The MAX KTL3-X2 series carries an IP66 enclosure protection rating, meaning it is fully dust-tight and protected against powerful water jets, enabling outdoor installation. The inverter includes built-in Type II surge protection devices (SPDs) on both the DC and AC sides, and select models support AFCI (Arc Fault Circuit Interrupter) functionality for detecting arc faults within DC strings. This protection suite meets the requirements of most industrial project owners and insurers. ### Growatt is a Chinese manufacturer not listed as Tier 1 by BNEF - is it a trustworthy choice for a business installation? Growatt does not appear on the Bloomberg NEF Tier 1 list; however, it is one of the largest inverter manufacturers in the world by sales volume and has had a sustained presence in the European market for many years. The company holds all certifications required for the EU market. It is important to note that the Tier 1 designation reflects a financial bankability classification, not product quality. Regardless of brand, it is advisable to verify that the chosen distributor provides local warranty service and guaranteed spare-parts availability for a minimum of 10 years. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/max-125-150ktl3-x2-mv-b3067af88979.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Ginlong Solis S5-GC125K-HV](https://comparepv.com/inverter/ginlong-solis-s5-gc125k-hv) | 125 kW | 98.6% | 10 | 91.0 kg | +2 MPPT, 7.0 kg heavier | | [Growatt MAX 125KTL3-X LV](https://comparepv.com/inverter/growatt-max-125ktl3-x-lv) | 125 kW | 98.4% | 10 | 84.0 kg | +2 MPPT | | [Sungrow SG125CX-P2](https://comparepv.com/inverter/sungrow-sg125cx-p2) | 125 kW | 98.3% | 12 | 93.0 kg | +4 MPPT, 9.0 kg heavier | | [SOFAR 125KTLX-G4-A](https://comparepv.com/inverter/sofar-solar-sofar-125ktlx-g4-a) | 125 kW | 98.3% | 10 | 75.0 kg | +2 MPPT, 9.0 kg lighter | | [Ginlong Solis S6-GC125K](https://comparepv.com/inverter/ginlong-solis-s6-gc125k) | 125 kW | 98.3% | 10 | 96.0 kg | +2 MPPT, 12.0 kg heavier | | [Ginlong Solis S6-GC125K-HV](https://comparepv.com/inverter/ginlong-solis-s6-gc125k-hv) | 125 kW | 98.3% | 10 | 96.0 kg | +2 MPPT, 12.0 kg heavier | | [SMA Solar STP 125-70 (Sunny Tripower 125)](https://comparepv.com/inverter/sma-solar-stp-125-70-sunny-tripower-125) | 125 kW | 98.1% | 12 | 96.0 kg | +4 MPPT, 12.0 kg heavier | | [Growatt MAX 125KTL3-X2 LV](https://comparepv.com/inverter/growatt-max-125ktl3-x2-lv) | 125 kW | | 8 | 84.0 kg | Similar on paper | --- Source: https://comparepv.com/inverter/growatt-max-125ktl3-x2-mv