--- title: "Sungrow SG136TX Grid-tie Inverter: Specs & Datasheet | ComparePV" description: "Sungrow SG136TX 136 kW grid-tie inverter. Specs: 12 MPPT, 1100 V max DC input, 92.5 kg." source: "https://comparepv.com/inverter/sungrow-sg136tx" updated: 2026-01-16 --- # Sungrow SG136TX ## Identity - **Manufacturer:** Sungrow - **Model:** SG136TX - **Series:** SG136TX - **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 | 12 | 10 | Strong - top 14% | 3 | | Max DC input voltage | 1100 V | 1100 V | Typical | 47 | | Weight per kW | 0.7 | 0.6 | Typical | 66 | | Warranty | - | 5 yrs | | | ## Specification ### AC output - **Rated AC power:** 136 kW - **Max AC power:** 150.00 kW - **Max apparent power:** 150.00 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 540 V - **Max AC current:** 160.4 A - **Grid frequency:** 50 Hz - **Power factor:** 0.8 leading to 0.8 lagging - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC voltage:** 1100 V - **MPPT voltage range:** 200 to 1000 V - **Start-up voltage:** 250 V - **MPPT trackers:** 12 - **Max input current per MPPT:** 26.0 A - **Max short-circuit current per MPPT:** 40.0 A ### Efficiency - **Max efficiency:** 99.0 % ### Physical - **Dimensions:** 660 × 1051 × 362 mm - **Weight:** 92.5 kg - **Enclosure:** IP66 - **Cooling:** forced-air - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 5000 m ### Connectivity and protection - **Interfaces:** Bluetooth, Display - **Protocols:** RS485, PLC (optional), Bluetooth (via APP) - **Protection:** DC switch, Surge protection ### Warranty and certificates - **Certifications:** IEC62109-1, IEC62109-2, IEC61727, IEC62116, GB/T19964, NB/T32004-2018, CGC/GF 035-2013, CNCA/CTS0002-2014, Q/GDW 1617-2015, GB/T 32826-2016, GB/T 32892-2016 ### Pros - **12 Independent MPPT Channels** - The 12-MPPT architecture enables independent string-level optimization, delivering a 10-20% energy yield improvement in C&I installations with multiple roof sections or partial shading compared to inverters with only 1-2 MPPT inputs. It also supports mixed panel orientations without significant losses. - **98.51% European Efficiency** - An EU efficiency rating of 98.51% places the SG136TX among the top performers in the three-phase 100-150 kW inverter segment. For a 500 kWp system, a 0.3-0.5 percentage point advantage over an average inverter of this class translates to a real-world gain of 1,500-2,500 kWh of additional energy fed to the grid annually. - **Built-In String I-V Curve Scanning** - The integrated I-V curve scan function identifies string-level faults - including glass cracks, damaged bypass diodes, and PID degradation - across an entire plant in approximately 15 minutes with accuracy better than 0.5%. This significantly reduces fault localization time and eliminates the need for external IV tracers. - **IP66 Enclosure, Operating Range -30…+60°C** - The sealed, industrial-grade IP66 enclosure combined with a wide operating temperature range eliminates the need for additional air-conditioned outdoor cabinets, reducing BoS costs and simplifying system design for industrial rooftops and open-field PV plants. - **Tier-1 / Bankable, CE/LVD/EN 62109 Certified** - Sungrow has appeared continuously on Bloomberg NEF bankable manufacturer lists (Tier 1, H1 2025) for over a decade. This track record facilitates project financing and insurance for commercial installations - a critical factor for projects above 200 kWp that require formal investor due diligence. ### Cons - **92.5 kg Unit Weight - Challenging Installation** - At 92.5 kg, the unit requires a minimum of two qualified installers and dedicated lifting equipment (a dolly or mounting bracket). Competing inverters in the same power class - such as the Huawei SUN2000-100KTL-M2 (~70 kg) - are noticeably lighter, which matters when site access is restricted or wall-mount height is elevated. - **1000V DC Architecture vs. 1500V Industry Standard** - The maximum DC input voltage is 1000V, while newer-generation C&I inverters (e.g., Sungrow SG250HX, Huawei SUN2000-215KTL) operate on a 1500V DC bus. For systems above 500 kWp, shorter DC string lengths result in higher DC wiring costs and a greater number of inverters required, increasing the overall installed cost per kWp. ## About this series The Sungrow SG136TX series are three-phase grid-tie inverters designed for commercial and industrial installations, where reliable operation, diagnostics, and rapid service are essential. Their key advantage is the **multi-string MPPT architecture** - simplifying the management of strings on different panels, with varying orientations and partial shading, leading to better energy yields in real-world conditions. In practice, it also supports design with high-current modern modules, including bifacial ones, and additionally offers features limiting PID degradation, helping maintain production over time. High **European efficiency** means fewer losses under typical operating conditions in Poland, resulting in more energy fed into the grid annually. A plus is **string monitoring and diagnostics**, including I-V curve scanning, which speeds up the identification of faults. Communication includes solutions like RS485/PLC and integration with the app. The device features a **sealed, industrial enclosure** and a set of safety/conformity certificates (CE, LVD), making it well-suited for rooftop installations on warehouse halls and PV farms. ## Questions ### How many MPPT inputs does the Sungrow SG136TX inverter have, and why does that matter for commercial installations? The Sungrow SG136TX features 12 independent Maximum Power Point Trackers (MPPT) with a voltage range of 200-1000 V. This allows the installer to run strings from different roof sections of an industrial building - with varying orientations or partial shading - while each string operates at its own optimal power point. In practice, this translates into higher annual energy yields compared to inverters with fewer MPPT inputs. ### What is the efficiency of the Sungrow SG136TX, and how much energy is lost during conversion? The SG136TX achieves a maximum efficiency of 99% and a European efficiency of 98.51%. The European efficiency rating better reflects real-world losses in climates such as Poland's, where instantaneous power rarely reaches its peak. In practical terms, approximately 985 kWh out of every 1 MWh generated by the PV modules is delivered to the grid - one of the highest figures in the 100+ kW commercial inverter class. ### Can the Sungrow SG136TX be installed outdoors on an industrial building? Yes. The inverter carries an IP66 enclosure rating, providing complete protection against dust ingress and powerful water jets. The operating temperature range spans from -30 °C to +60 °C, making the unit fully capable of handling Polish winters as well as the high temperatures found on metal industrial rooftops. CE and LVD certifications confirm compliance with European regulatory requirements. ### Is the SG136TX inverter compatible with modern bifacial modules that carry high input currents? Yes. The SG136TX series is designed with next-generation modules in mind, including bifacial panels operating at elevated currents. The built-in PID Recovery function protects modules against potential-induced degradation, which is particularly relevant for long strings. This makes the inverter a natural fit for the bifacial modules widely used in utility-scale farms and commercial & industrial (C&I) rooftop installations. ### How does string diagnostics work in the Sungrow SG136TX, and what is an I-V curve scan? The SG136TX provides individual string-level monitoring alongside an I-V curve scan function. This feature automatically traces the current-voltage (I-V) characteristic of a given string and compares it against a reference profile. Deviations indicate damaged cells, wiring faults, or shading events - giving service technicians a ready diagnosis rather than requiring trial-and-error fault-finding, which significantly reduces system downtime. ### What warranty applies to the Sungrow SG136TX, and can it be extended? The standard manufacturer's warranty for Sungrow TX-series inverters is 5 years from the date of purchase. As a Tier 1 manufacturer with a global service network, Sungrow offers extended warranty packages - exact terms and available service plans should be confirmed with an authorized distributor in Poland. The brand's worldwide presence ensures parts availability and technical support throughout the full operational lifetime of the installation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/ds-20191025-sg136tx-v13-1-cn-2a681fa0477b.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 | -3 MPPT, 10.5 kg lighter | | [Growatt MAX 136KTL3-X2 MV](https://comparepv.com/inverter/growatt-max-136ktl3-x2-mv) | 136 kW | | 8 | 84.0 kg | -4 MPPT, 8.5 kg lighter | | [Growatt MAX 136KTL3-X MV](https://comparepv.com/inverter/growatt-max-136ktl3-x-mv) | 136 kW | | 10 | 84.0 kg | -2 MPPT, 8.5 kg lighter | | [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, -2 MPPT, 1.5 kg lighter | | [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, -2 MPPT, 8.5 kg lighter | | [Sungrow SG125CX-P2](https://comparepv.com/inverter/sungrow-sg125cx-p2) | 125 kW | 98.3% | 12 | 93.0 kg | -11.0 kW | | [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, -2 MPPT, 17.5 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, -2 MPPT, 3.5 kg heavier | --- Source: https://comparepv.com/inverter/sungrow-sg136tx