--- title: "Growatt MAX 120KTL3-X LV Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Growatt MAX 120KTL3-X LV 120 kW grid-tie inverter. Specs: 98.4% European efficiency, 10 MPPT, 1100 V max DC input, 84.0 kg, 5 yrs warranty." source: "https://comparepv.com/inverter/growatt-max-120ktl3-x-lv" updated: 2026-01-16 --- # Growatt MAX 120KTL3-X LV ## Identity - **Manufacturer:** Growatt - **Model:** MAX 120KTL3-X LV - **Series:** MAX 100-125KTL3-X LV - **Rated AC power:** 120 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 | 98.4% | 98.6% | Typical | 42 | | MPPT trackers | 10 | 10 | Typical | 18 | | Max DC input voltage | 1100 V | 1100 V | Typical | 47 | | Weight per kW | 0.7 | 0.6 | Typical | 70 | | Warranty | 5 yrs | 5 yrs | Typical | 2 | ## Specification ### AC output - **Rated AC power:** 120 kW - **Max apparent power:** 132.00 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 400 V - **Max AC current:** 174.6 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading ... 0.8 lagging - **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:** 10 - **Max input current per MPPT:** 32.0 A - **Max short-circuit current per MPPT:** 40.0 A ### Efficiency - **European efficiency:** 98.4 % - **Max efficiency:** 98.5 % ### 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:** RS485, USB, PLC (optional), GPRS (optional), 4G (optional), WiFi (optional) - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Warranty:** 5 years - **Certifications:** CE, UKCA, IEC62116, IEC61727, CQC, VDE0126, VFR2019, EN50549-1, EN50549-2, C10/C11, UNE206007, G99, CEI 0-21/0-16, N4105, UNE206006, MEA, PEA, KSC8565 ### Pros - **10 MPPT, with a power range of 100-125 kW** - For inverters with a power of 100-125 kW, 10 independent MPPT trackers represent a performance level comparable to the Huawei SUN2000-100KTL-M2 (10 MPPT) and significantly exceeds models with 6-8 MPPT in this power class. This allows for connecting strings from different orientations (azimuth and tilt) without losses due to mismatch, which is crucial in large rooftop installations on warehouses and storage facilities. - **European efficiency: 98.5% / maximum 98.8%** - The European efficiency of 98.5%, as confirmed in the datasheet, is comparable to that of the Huawei SUN2000-100KTL-M2 (98.5%) and exceeds the typical median for the 100 kW commercial segment (~98.0-98.3%). This translates to lower conversion losses over a year and a higher amount of energy fed back into the grid. - **DC fuse-less design** - The DC input without string fuses eliminates one of the main failure points and fire hazards in commercial-grade inverters. It reduces operating costs (no need to replace fuses) and shortens maintenance time. The AFCI option further protects against electrical arcs in the DC circuit. - **Diagnosis (I-V) + string monitoring** - Integrated I-V curve scanning and intelligent string monitoring allow for the identification of faulty modules or shading issues without the need for additional measurement devices. In installations of 100+ kW, this reduces diagnostic time from several hours to minutes, directly lowering O&M costs. - **Comprehensive package of European certificates** - The inverter has certifications for CE, IEC62116, IEC61727, VDE0126, EN50549-1/2, G99 (UK), CEI 0-21/0-16 (Italy), C10/C11 (Belgium), which covers the connection requirements of most EU markets, eliminating the need for additional testing. This simplifies the connection process and reduces the time required to commission the installation. ### Cons - **Not meeting Tier-1 bankability criteria** - Growatt is not listed on the Tier-1 bankable inverter lists published by BNEF (as of 2025). This could present a barrier for projects financed by banks or infrastructure funds, which typically require equipment from Tier-1 manufacturers as a condition for providing loans. Competitors such as SMA, Fronius, and Huawei do hold this status. - **Short-term market experience vs. European leaders** - Growatt was founded in 2010 (15 years of history), while SMA has been operating since 1981 (44 years), and Fronius since 1945 (80 years). For investors assessing the long-term warranty and service availability after 10-20 years of operation, a shorter market presence is a real risk factor, especially for large industrial facilities. ## About this series Growatt MAX 100-125KTL3-X LV three-phase grid-tie inverters are designed for commercial and industrial installations, where reliable operation, flexible PV string layouts, and fast diagnostics are essential. A key feature is **up to 10 MPPT**, enabling easier segmentation of strings across different rooftop areas, orientations, and tilts, while minimizing losses due to partial shading or module mismatch. In practice, this translates to more predictable energy yields in variable conditions. High **European efficiency** means better performance under typical operating conditions, delivering significantly more energy to the grid annually. The series supports advanced service features, including **smart string monitoring** and I/V curve scanning and diagnostics, which shorten problem detection time. For communication and monitoring, USB and RS485 interfaces, along with Growatt remote monitoring solutions (e.g., WiFi/Ethernet modules and the platform/app), can be used. The entire system is complemented by **IP66** protection, surge protection, and available warranty options, making this series an excellent choice for rooftop systems, halls, warehouses, and large commercial facilities. ## Questions ### What is the warranty period for the Growatt MAX 100-125KTL3-X LV inverter, and can it be extended? The standard warranty for the Growatt MAX 100-125KTL3-X LV series is 5 years. Growatt offers the option to extend the warranty for an additional period at an extra cost - terms and pricing for the extension must be agreed upon with an authorized distributor in Poland. When selecting an inverter for a large commercial installation, it is advisable to factor this cost into the project budget. ### Why does the MAX 100-125KTL3-X LV series feature as many as 10 MPPT trackers, and what are the practical benefits? Ten independent MPPT trackers allow strings of PV modules from different roof sections, with varying tilt angles and azimuths, to be connected without mutually reducing energy yield. In practice, this means that partial shading of one string group does not drag down the performance of the entire system. This is a key advantage for industrial buildings and warehouses with complex, multi-oriented roof layouts. ### What is the maximum efficiency of the Growatt MAX 100-125KTL3-X LV inverter? The maximum efficiency of the series reaches up to 98.8%, and the European efficiency (Euro efficiency), calculated for typical Central European operating conditions, also ranks at a high level. Over the course of a year, this translates into measurably more energy delivered to the grid compared to devices with lower efficiency ratings - a factor of significant economic importance in installations rated at 100-125 kW. ### Is the Growatt MAX 100-125KTL3-X LV inverter suitable for large rooftop installations on industrial halls or warehouses? Yes, the MAX 100-125KTL3-X LV series is specifically designed for commercial and industrial applications on halls, warehouses, and large service facilities. The IP66 protection rating ensures resistance to dust and powerful water jets, while the C5 anti-corrosion construction protects against degradation in harsh industrial environments. The 100-125 kW power range makes it possible to serve large PV arrays without the need for multiple smaller units. ### How does the intelligent string monitoring and I-V curve scanning function work in the MAX 100-125KTL3-X LV series? The inverter continuously measures the current and voltage of each string and compares the results across groups. The I-V curve scan function enables electrical characterization diagnostics of PV modules without requiring a service technician to physically access the roof - deviations from the expected curve profile can indicate a faulty module, defective connector, or shading event. This significantly reduces fault detection time and lowers the overall service costs of large-scale installations. ### What communication interfaces does the Growatt MAX 100-125KTL3-X LV offer, and how can the installation be monitored remotely? The inverter is equipped as standard with USB and RS485 interfaces, enabling integration with BMS systems or local data logging. For remote monitoring, optional Growatt WiFi or Ethernet communication modules can be connected, linking the device to the Growatt Smart Energy Manager platform or the mobile application. Production data can be stored for multiple years, facilitating long-term yield analysis and energy accounting. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/MAX-100-125KTL3-X-LV-Datasheet-202305-0956012e16b5.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [SolarEdge SE120K (Synergy, 480V)](https://comparepv.com/inverter/solaredge-se120k-synergy-480v) | 120 kW | 98.0% | | 32.0 kg | -0.4 pp efficiency, 52.0 kg lighter | | [Growatt MAX 120KTL3-X2 LV](https://comparepv.com/inverter/growatt-max-120ktl3-x2-lv) | 120 kW | | 8 | 84.0 kg | -2 MPPT | | [SolarEdge SE120KUS](https://comparepv.com/inverter/solaredge-se120kus) | 120 kW | | | 32.0 kg | 52.0 kg lighter | | [Growatt MAX 124KTL3-X2 MV](https://comparepv.com/inverter/growatt-max-124ktl3-x2-mv) | 124 kW | 98.5% | 8 | 84.0 kg | +4.0 kW, -2 MPPT | | [Huawei SUN2000-115KTL-M2](https://comparepv.com/inverter/huawei-sun2000-115ktl-m2) | 115 kW | 98.6% | 10 | 93.0 kg | -5.0 kW, 9.0 kg heavier | | [Ginlong Solis S5-GC125K-HV](https://comparepv.com/inverter/ginlong-solis-s5-gc125k-hv) | 125 kW | 98.6% | 10 | 91.0 kg | +5.0 kW, 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 | +5.0 kW | | [Sungrow SG125CX-P2](https://comparepv.com/inverter/sungrow-sg125cx-p2) | 125 kW | 98.3% | 12 | 93.0 kg | +5.0 kW, +2 MPPT, 9.0 kg heavier | --- Source: https://comparepv.com/inverter/growatt-max-120ktl3-x-lv