--- title: "Growatt WIT 100K-AU-US Hybrid Inverter: Specs & Datasheet | ComparePV" description: "Growatt WIT 100K-AU-US 100 kW hybrid inverter. Specs: 140.0 kg, 10 yrs warranty." source: "https://comparepv.com/inverter/growatt-wit-100k-au-us" updated: 2026-01-16 --- # Growatt WIT 100K-AU-US ## Identity - **Manufacturer:** Growatt - **Model:** WIT 100K-AU-US - **Series:** WIT 50-100K - **Rated AC power:** 100 kW - **Type:** Hybrid - **Phases:** Three-phase - **Battery port:** yes ## How it compares Compared against 243 inverters from 30 to 100 kW. Ranks are within that class. | Measure | This inverter | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | European efficiency | - | 98.2% | | | | MPPT trackers | - | 4 | | | | Max DC input voltage | - | 1100 V | | | | Weight per kW | 1.4 | 1.1 | Typical | 161 | | Warranty | 10 yrs | 5 yrs | Strong - top 17% | 8 | ## Specification ### AC output - **Rated AC power:** 100 kW - **Max AC power:** 110.00 kW - **Max apparent power:** 110.00 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 480 V - **Max AC current:** 132.4 A - **Grid frequency:** 60 Hz - **Power factor:** -1…+1 - **Harmonic distortion (THD):** 3.0 % ### Efficiency - **Max efficiency:** 98.2 % ### Battery - **Battery port:** Yes - **Battery voltage:** 750-1000V for 3P3W / 820-1000V for 3P4W - **Max charge current:** 151.3 A - **Max discharge current:** 151.3 A - **Grid-forming:** Yes ### Physical - **Dimensions:** 1350 × 850 × 510 mm - **Weight:** 140.0 kg - **Enclosure:** IP66/NEMA 4X - **Cooling:** forced-air - **Operating temperature:** -30 to 60 °C - **Max humidity:** 100 % - **Max altitude:** 4000 m ### Connectivity and protection - **Interfaces:** Wi-Fi, Ethernet, Display - **Protocols:** RS485, CAN, WiFi, 4G, LAN - **Protection:** Surge protection ### Warranty and certificates - **Warranty:** 10 years - **Certifications:** UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1 ### Pros - **Peak Efficiency of 98.2%** - The EU datasheet (202405) rates peak efficiency at 98.2%, placing the series in the upper tier of three-phase hybrid C&I inverters. The high European efficiency translates into meaningfully higher annual energy yields in the Polish climate, where partial-load operating hours significantly outnumber STC-equivalent hours. - **Up to 10 Independent MPPT Inputs** - The 100K model features 10 independent MPPT inputs with a DC voltage range of 180-800 V and a maximum input voltage of 1,100 V. This enables large-scale system design on sites with multiple roof sections, mixed orientations, or partial shading, eliminating mismatch losses between strings. - **UPS Function and Black Start as Standard** - The built-in UPS function (transfer time \<20 ms per datasheet) and black-start capability allow selected circuits to remain energized during a grid outage without additional equipment. This is a notable advantage over conventional C&I grid-tied inverters such as the Sungrow SG50CX, which require a separate backup module. - **110% Continuous AC Overload + 100% Phase Imbalance** - The series supports continuous AC overload at 110% of rated power and fully unbalanced three-phase output (100% phase imbalance). This simplifies backup power for single-phase industrial loads and accommodates irregular power consumption profiles typical of commercial facilities. - **IP66 Enclosure + Type II SPD on Both DC and AC Sides** - The IP66/NEMA 4X enclosure allows outdoor installation without an additional protective cabinet. Integrated Type II surge protective devices (SPDs) on both the DC and AC sides reduce installation cost by eliminating the need for external SPDs otherwise required under standards such as EN 62305. ### Cons - **Not Listed on BNEF Tier 1 Inverter Manufacturers** - Growatt does not appear on the BloombergNEF Tier 1 Power Inverter Manufacturers list (Q1-Q2 2026). For externally financed projects - including leasing, investment loans, and PPAs - lenders and funds frequently require equipment from Tier 1-listed suppliers (e.g., Sungrow, SMA, GoodWe), which may complicate or increase the cost of financing for systems built around this series. - **Standard Warranty of Only 5 Years** - The base warranty period is 5 years; extension to 10 years is available as a paid option. By comparison, Sungrow's SG50-100CX-P2 series includes a 10-year standard warranty for the European market - a meaningful difference in total cost of ownership (TCO) for C&I equipment expected to operate over a 25-year system lifetime. ## About this series Growatt WIT 50-100K are **three-phase hybrid inverters** designed for larger commercial and industrial installations, where grid working flexibility and the possibility of energy storage expansion are key. They feature **built-in UPS and black start functionality**, enabling selected circuits to be kept operational in emergency mode and reliably powering demanding loads in the company. The application of **multiple MPPT channels** facilitates the design of rooftop installations with different roof pitches - it allows for better energy utilization in cases of shading, panels with different orientations, and uneven dirt accumulation. High European efficiency translates into genuinely higher yields under typical climatic conditions in Poland, meaning more energy annually from the same modules. System monitoring is available via popular communication methods, including WiFi and Ethernet, as well as through an app. Additionally, the series offers **surge protection type II on both DC and AC sides**, and the highly sealed enclosure facilitates outdoor mounting. This is a sensible choice for companies looking to combine self-consumption with storage and backup power options. ## Questions ### How many MPPT channels does the Growatt WIT 50-100K inverter have, and is that sufficient for a large-scale installation? The number of MPPT channels varies by rated power: the WIT 50K features 7 MPPT channels, the WIT 63K offers 8, and both the WIT 75K and WIT 100K provide 10 MPPT channels. Maximum DC input reaches 156 kW. This configuration allows independent management of multiple roof sections or array strings with different orientations - a critical advantage for large industrial rooftops and warehouses. ### Does the Growatt WIT 100K inverter provide backup power during a grid outage? Yes, the entire WIT 50-100K series includes a built-in UPS function and black start capability. In the event of a grid voltage loss, the inverter can automatically switch selected circuits to power supplied from a battery energy storage system. The black start feature additionally allows the system to restart from a de-energized state without requiring grid voltage to be present. ### What warranty is offered on the Growatt WIT 50-100K inverters? The standard manufacturer's warranty for the WIT 50-100K series is 5 years, with an optional extension available up to 10 years. It is worth noting that Growatt does not appear on the Tier 1 inverter lists maintained by BNEF; therefore, when evaluating this product, it is advisable to verify the service terms and the availability of authorized technical support in your region. ### Can the Growatt WIT 50-100K inverter be installed outdoors? Yes, the WIT 50-100K series enclosure carries an IP66 ingress protection rating, providing complete protection against dust and powerful water jets. The inverter is therefore suitable for wall-mounting on the exterior of an industrial or commercial building. During installation, however, the unit weight of approximately 160 kg must be taken into account, and an adequately load-bearing mounting structure must be provided. ### Which battery energy storage systems are compatible with the Growatt WIT 50-100K? The WIT 50-100K series is designed to operate with high-voltage lithium-ion battery systems in the voltage range of 750-1000 V (3-phase, 3-wire configuration). The maximum charge and discharge current is approximately 151 A. Growatt offers compatible proprietary battery modules, and system integration is handled via CAN or RS485 interfaces. ### How does monitoring work for a system using the Growatt WIT 50-100K inverter? The inverter supports communication via Wi-Fi, Ethernet (LAN), and optionally 4G and RS485. Installation data is available in real time through the Growatt mobile application and the ShineServer cloud platform. This enables remote tracking of energy production, battery state of charge, and grid parameters - an important feature for industrial installations that require continuous supervision. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/wit-50-100k-au-us-datasheet-en-202503-51ad8f181b0c.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Ginlong Solis S6-EH3P100K10-NV-YD-H](https://comparepv.com/inverter/ginlong-solis-s6-eh3p100k10-nv-yd-h) | 100 kW | 97.2% | 10 | 170.0 kg | 30.0 kg heavier | | [Growatt WIT 100K-A-US / WIT 100K-AU-US](https://comparepv.com/inverter/growatt-wit-100k-a-us-wit-100k-au-us) | 100 kW | | | 120.0 kg | 20.0 kg lighter | | [Growatt WIT 100K-H-US / WIT 100K-HU-US](https://comparepv.com/inverter/growatt-wit-100k-h-us-wit-100k-hu-us) | 100 kW | | 10 | 60.0 kg | 80.0 kg lighter | | [Growatt WIT 100K-A](https://comparepv.com/inverter/growatt-wit-100k-a) | 100 kW | | | 120.0 kg | 20.0 kg lighter | | [Growatt WIT 100K-AU](https://comparepv.com/inverter/growatt-wit-100k-au) | 100 kW | | | 120.0 kg | 20.0 kg lighter | | [Growatt WIT 100K-H / WIT 100K-HU](https://comparepv.com/inverter/growatt-wit-100k-h-wit-100k-hu) | 100 kW | | | 140.0 kg | Similar on paper | | [Growatt WIT 100K-HU-US](https://comparepv.com/inverter/growatt-wit-100k-hu-us) | 100 kW | | | 160.0 kg | 20.0 kg heavier | | [GoodWe GW100-PCS-N-G10](https://comparepv.com/inverter/goodwe-gw100-pcs-n-g10) | 100 kW | | | 80.0 kg | 60.0 kg lighter | --- Source: https://comparepv.com/inverter/growatt-wit-100k-au-us