--- title: "Growatt MAX 136KTL3-X MV Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Growatt MAX 136KTL3-X MV 136 kW grid-tie inverter. Specs: 10 MPPT, 1100 V max DC input, 84.0 kg." source: "https://comparepv.com/inverter/growatt-max-136ktl3-x-mv" updated: 2026-01-16 --- # Growatt MAX 136KTL3-X MV ## Identity - **Manufacturer:** Growatt - **Model:** MAX 136KTL3-X MV - **Series:** MAX KTL3-X MV - **Rated AC power:** 136 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 | 10 | 10 | Typical | 18 | | Max DC input voltage | 1100 V | 1100 V | Typical | 47 | | Weight per kW | 0.6 | 0.6 | Typical | 52 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 136 kW - **Max apparent power:** 149.60 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 480 V - **Max AC current:** 179.9 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 - **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 - **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 10 independent MPPT trackers** - The 10 MPPT architecture (two strings per tracker, totaling 20 PV input points) allows for independent optimization of strings with different orientations, tilt angles, or levels of shading. In industrial installations with multiple roof surfaces, this translates to a measurable increase in energy yield compared to inverters with 2-4 trackers (e.g., SMA CORE2 100 kW with 6 MPPT). - **Working with medium voltage (MV) systems** - The MV version delivers power directly to the medium voltage level (e.g., 10/20 kV), eliminating the need to purchase and install an external step-down transformer in large commercial and industrial installations. This reduces both BOS (Balance of System) costs and the potential for failures compared to LV versions that require an additional transformer. - **I/V waveform scanner with string diagnostics** - The built-in intelligent I/V scanning function allows for the detection of module degradation, faulty bypass diodes, or contamination without the need for an external analyzer. When combined with string monitoring by the Shine platform, this feature reduces the time required for service diagnostics and lowers the operating costs of multi-string installations. - **IP66 protection class according to standard** - The IP66 enclosure provides complete protection against dust and strong water jets, allowing for direct outdoor mounting without the need for additional covers. This is particularly important in industrial installations (warehouses, storage facilities, solar farms) that are exposed to harsh environmental conditions. - **High efficiency - up to ~98.8%** - Models from the MAX KTL3-X series achieve a maximum efficiency of up to 98.8% (data from similar LV versions, confirmed by distributors), while European efficiency is approximately 98.5%. This translates to a significantly higher energy yield in Polish climatic conditions, with frequent partial loads, compared to EU-standard devices with efficiency below 97.5%. ### Cons - **Not classified as a Tier 1 bankable entity by BNEF** - Growatt is not included in the BNEF Tier 1 Bankable list for inverters (as of 2025/2026), which may make it difficult or impossible for banks requiring this status to finance non-recourse projects. Competitors such as SMA, Huawei FusionSolar, and Sungrow have Tier 1 status, which is often a necessary condition for projects financed by external sources. - **Warranty fulfillment time: 23-40 days** - According to available industry data, Growatt typically takes 23-40 working days to process warranty claims, while manufacturers with established local service infrastructure (e.g., SMA in Germany, local Fronius distributors in Poland) can complete equipment replacements in 5-10 days. In industrial installations, downtime of the inverter directly translates into lost revenue. - **Lack of native integration with energy storage systems** - The MAX KTL3-X MV series is a purely grid-tied inverter, without DC-coupled or AC-coupled storage functionality. Given the increasing demands of the C&I (Commercial and Industrial) market (e.g., requirements for DSR readiness and peak shaving), it is necessary to expand the installation with a separate battery inverter, which increases CAPEX and system complexity compared to competing hybrid solutions. ## About this series Growatt MAX KTL3-X MV series are three-phase grid-tie inverters, designed for commercial and industrial installations where reliable operation and rapid diagnostics are essential. A key feature is their multi-string MPPT architecture-up to 10 trackers-which makes it easier to optimize energy yield when dealing with varied string orientations, uneven module soiling, or partial shading. Another advantage is intelligent string monitoring and I/V curve scanning, which facilitate the detection of performance drops and speed up maintenance. The high European efficiency translates into significantly greater energy production in typical operating conditions in Poland, not just in a laboratory setting. Remote monitoring is achieved through the Shine ecosystem (e.g., app) and data loggers, which can operate via WiFi or Ethernet. This is not a hybrid series-**it does not directly work with energy storage systems**-unlike battery inverters. For outdoor applications, an IP66-rated enclosure is included, and the package features standard conformity documents (including CE) and options for extended warranty. ## Questions ### How many MPPT trackers does the Growatt MAX KTL3-X MV have, and why does that matter in large-scale installations? The MAX KTL3-X MV series features up to 10 independent MPPT trackers. In practice, this means that string arrays oriented at different azimuths, or affected by varying degrees of shading or soiling, operate independently of one another. This prevents a single underperforming string from dragging down the output of the entire system - a critical advantage in large commercial installations such as industrial warehouses or logistics facilities with complex roof geometries. ### Does the Growatt MAX KTL3-X MV support battery storage or off-grid operation? No. The MAX KTL3-X MV series is a strictly grid-tied (on-grid) inverter and does not include battery charging functionality or an off-grid (island) mode. It is not designed to interface directly with energy storage systems. If battery storage or the ability to operate independently of the utility grid is a requirement, you should consider a dedicated Growatt hybrid inverter series, such as the SPH or SPA line. ### What is the standard warranty on the Growatt MAX KTL3-X MV, and can it be extended? The standard manufacturer's warranty for the MAX KTL3-X MV series is 10 years. Growatt offers the option to purchase an extended warranty, which is particularly important for commercial and industrial installations where unplanned downtime translates directly into financial losses. The terms and conditions for warranty extension should be confirmed with an authorized distributor prior to purchase. ### What types of PV installations is the Growatt MAX KTL3-X MV designed for? The MAX KTL3-X MV series is engineered for commercial and industrial PV installations typically starting at around 100 kW and above, where medium-voltage (MV) output is required. It is ideally suited for ground-mounted systems and large industrial facilities, logistics centers, or solar farms connected directly to the medium-voltage grid - eliminating the need for an external MV transformer and reducing overall BoS costs. ### What is I-V curve scanning in the Growatt MAX KTL3-X MV, and how does it support maintenance? I-V curve scanning is an automated diagnostic feature that measures the actual current-voltage characteristic of each string and compares it against the panel manufacturer's reference curve. The inverter itself identifies which string deviates from the expected profile - whether due to a damaged cell, a faulty connection, or module soiling. This eliminates the need for technicians to troubleshoot faults by trial and error, significantly reducing intervention time and lowering the overall operation and maintenance costs of the installation. ### How can I remotely monitor the Growatt MAX KTL3-X MV inverter? Remote monitoring is handled through Growatt's Shine ecosystem. A data logger connected to the inverter communicates via Wi-Fi or Ethernet, and all data is accessible through the Shine mobile app or the ShineServer web portal. Users have visibility into real-time generation data, historical production records, and fault alerts. For integration with third-party platforms, the system can optionally interface with external SCADA solutions via the Modbus protocol. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/max-125-150ktl3-x-mv-d8a0713d58ea.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Solis-136K-EHV-5G](https://comparepv.com/inverter/ginlong-solis-solis-136k-ehv-5g) | 136 kW | 98.5% | 9 | 82.0 kg | -1 MPPT, 2.0 kg lighter | | [Growatt MAX 136KTL3-X2 MV](https://comparepv.com/inverter/growatt-max-136ktl3-x2-mv) | 136 kW | | 8 | 84.0 kg | -2 MPPT | | [Sungrow SG136TX](https://comparepv.com/inverter/sungrow-sg136tx) | 136 kW | | 12 | 92.5 kg | +2 MPPT, 8.5 kg heavier | | [Ginlong Solis S5-GC125K-HV](https://comparepv.com/inverter/ginlong-solis-s5-gc125k-hv) | 125 kW | 98.6% | 10 | 91.0 kg | -11.0 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 | -11.0 kW | | [Sungrow SG125CX-P2](https://comparepv.com/inverter/sungrow-sg125cx-p2) | 125 kW | 98.3% | 12 | 93.0 kg | -11.0 kW, +2 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 | -11.0 kW, 9.0 kg lighter | | [Ginlong Solis S6-GC125K](https://comparepv.com/inverter/ginlong-solis-s6-gc125k) | 125 kW | 98.3% | 10 | 96.0 kg | -11.0 kW, 12.0 kg heavier | --- Source: https://comparepv.com/inverter/growatt-max-136ktl3-x-mv