--- title: "Growatt WIT 75K-H-US / WIT 75K-HU-US Hybrid Inverter: Specs & Datasheet | ComparePV" description: "Growatt WIT 75K-H-US / WIT 75K-HU-US 75 kW hybrid inverter. Specs: 10 MPPT, 1100 V max DC input, 60.0 kg, 10 yrs warranty." source: "https://comparepv.com/inverter/growatt-wit-75k-h-us-wit-75k-hu-us" updated: 2026-01-16 --- # Growatt WIT 75K-H-US / WIT 75K-HU-US ## Identity - **Manufacturer:** Growatt - **Model:** WIT 75K-H-US / WIT 75K-HU-US - **Series:** WIT 50-100kW US - **Rated AC power:** 75 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 | 10 | 4 | Strong - top 7% | 1 | | Max DC input voltage | 1100 V | 1100 V | Typical | 3 | | Weight per kW | 0.8 | 1.1 | Strong - top 16% | 33 | | Warranty | 10 yrs | 5 yrs | Strong - top 17% | 8 | ## Specification ### AC output - **Rated AC power:** 75 kW - **Max apparent power:** 82.50 kVA - **Phases:** Three-phase - **Nominal AC voltage:** 480 V - **Max AC current:** 99.3 A - **Grid frequency:** 50 Hz - **Power factor:** -1 ~ +1 - **Harmonic distortion (THD):** 3.0 % ### PV input - **Max DC input power:** 156.60 kW - **Max DC voltage:** 1100 V - **MPPT voltage range:** 180 to 800 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:** 98.0 % ### Battery - **Battery port:** Yes - **Battery voltage:** 750-1000V - **Max charge current:** 151.3 A - **Max discharge current:** 151.3 A - **Backup power:** 100.00 kW - **Grid-forming:** Yes ### Physical - **Dimensions:** 820 × 760 × 228 mm - **Weight:** 60.0 kg - **Enclosure:** NEMA 4X (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, CAN, WiFi (optional), LAN (optional) - **Protection:** AFCI, Surge protection ### Warranty and certificates - **Warranty:** 10 years ### Pros - **10 Independent MPPT Channels** - The 100 kW model features 10 MPPT trackers (max. 32 A per input, voltage range 180-800 V), enabling multi-orientation and partially shaded installations to be served without yield losses across independent strings. According to manufacturer data, MPPT tracking efficiency reaches 99.5% under stable conditions. - **98.2% Peak Efficiency and Robust AC Specifications** - The declared peak efficiency of 98.2% positions this inverter above the typical median for the 50-100 kW commercial segment (~97.5-98.0%). Support for continuous 110% AC overload increases system resilience during sudden power demand spikes without tripping. - **UPS Function + Black Start + 100% Unbalanced Load Support** - The built-in UPS function with black start capability allows battery-powered startup without an energized grid - critical for industrial facilities with mission-critical loads. Island mode supports fully unbalanced loads (100%), which is uncommon at this power class. - **IP66 / NEMA 4X Enclosure and HV Battery Compatibility 750-1000 V** - The IP66/NEMA 4X protection rating permits installation in demanding industrial environments (dust, rain, pressure washing). Support for high-voltage battery packs at 750-1000 V results in lower operating currents and reduced DC-side transmission losses. - **System Scalability up to 300 kW** - The architecture supports parallel connection of units up to a combined output of 300 kW at a single site, enabling phased investment and capacity expansion without replacing the base inverter. ### Cons - **Not Listed as a BNEF Tier 1 Bankable Manufacturer** - Growatt does not appear on the BloombergNEF Tier 1 Bankable Power Inverter Manufacturers list (project context status: tier\_1\_bankable: false). In non-recourse financing arrangements with institutional lenders, the absence of this designation may require additional due diligence or serve as a disqualifying criterion with certain creditors. - **Standard 5-Year Warranty Counted from Shipment Date** - The base warranty period is 5 years from factory dispatch (maximum 5.5 years from delivery), not from the commissioning date. Extension to 10 years is available at additional cost. Premium competitors such as SMA and ABB/FIMER offer 5-10 years of standard warranty counted from system startup, and Growatt's typical warranty claim turnaround of 23-40 business days compares unfavorably to the 5-10 days typical of higher-tier suppliers. ## About this series Growatt WIT 50-100kW US are **three-phase hybrid inverters (grid-tie with energy storage)** designed for commercial and industrial installations where reliable operation, scalability, and rapid response to grid outages are essential. A key feature is the **built-in UPS and black start capability**, enabling the system to maintain critical circuits and start up battery power even during a grid outage. The use of **multiple MPPT channels** facilitates optimization of energy production under varying panel orientations, uneven sunlight exposure, and partial shading-without compromising string selection. High **European efficiency** means lower losses under typical operating conditions and a genuinely better annual energy yield. Monitoring can be achieved through communication modules (WiFi, Ethernet, 4G) and the Growatt platform, simplifying diagnostics and remote support. The inverters are compatible with high-voltage energy storage systems, and their enclosure, featuring enhanced sealing and a complete overvoltage protection set, ensures reliability in challenging environments. ## Questions ### How many MPPT channels does the Growatt WIT 50-100kW US inverter have, and does it support different roof orientations? The WIT 50-100kW US series features multiple independent MPPT channels - the 100 kW variant offers up to 10 trackers - each with a voltage range of 180-800 V and a maximum input current of 32 A. This allows strings from different roof orientations or with varying shading profiles to be connected without sacrificing yield, as each channel optimizes independently. ### Does the Growatt WIT 100kW US inverter operate during a grid outage, and what is the black start function? Yes, the WIT 50-100kW US series includes a built-in UPS and black start capability. This means the inverter can sustain power to critical circuits from the battery bank even after a complete grid failure, and subsequently restart the entire installation from a de-energized state without any external voltage source. In backup mode it supports 100% unbalanced three-phase loading, which is uncommon in this power class. ### What warranty is provided for the Growatt WIT 50-100kW US inverter? The standard warranty period is 5 years. The manufacturer offers an optional extension to 10 years, which should be factored into the operational cost planning for any commercial installation. Growatt is not classified as a Tier 1 inverter manufacturer, so prior to purchase it is advisable to verify the service terms with the local distributor and confirm the availability of spare parts in Poland. ### Which battery energy storage systems are compatible with the Growatt WIT 100kW US, and what battery voltage is required? The inverter is designed to operate with high-voltage lithium-ion battery energy storage systems (BESS). The required battery voltage range is 750-1000 V for a 3P3W configuration, or 820-1000 V for a 3P4W configuration. Continuous charge and discharge power reaches 113.5 kW. Compatibility with a specific BESS model should always be confirmed with the distributor, as not every storage system is certified for US-grid installations (480 V). ### Can a system built around the Growatt WIT 50-100kW US be scaled beyond 100 kW? Yes, the WIT US series architecture supports system scaling up to 300 kW through parallel connection of multiple units. This is a significant advantage for phased investments - the installation can begin at a lower power level and additional units can be added without replacing the entire infrastructure. Parallel configuration does, however, require dedicated cabling and synchronization, so the detailed engineering design should account for this from the outset. ### What is the efficiency of the Growatt WIT 100kW US inverter, and how does it affect annual energy yield? The maximum conversion efficiency is 98.2%, while the MPPT tracker efficiency exceeds 99%. In practice, for a 100 kW commercial installation, the difference between an inverter operating at 96% efficiency versus 98.2% translates to several thousand kilowatt-hours of additional yield per year. The IP66/NEMA 4X enclosure protects internal components under harsh environmental conditions, contributing positively to long-term parameter stability. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/inverters/WIT-50-100K-HU-US-1abcfea14e8c.pdf) ## Alternatives | Inverter | Rated AC | Euro efficiency | MPPT | Weight | Difference | | --- | --- | --- | --- | --- | --- | | [Growatt WIT 75K-A-US / WIT 75K-AU-US](https://comparepv.com/inverter/growatt-wit-75k-a-us-wit-75k-au-us) | 75 kW | | | 120.0 kg | 60.0 kg heavier | | [Growatt WIT 75K-AU-US](https://comparepv.com/inverter/growatt-wit-75k-au-us) | 75 kW | | | 140.0 kg | 80.0 kg heavier | | [Growatt WIT 75K-A](https://comparepv.com/inverter/growatt-wit-75k-a) | 75 kW | | | 120.0 kg | 60.0 kg heavier | | [Growatt WIT 75K-AU](https://comparepv.com/inverter/growatt-wit-75k-au) | 75 kW | | | 120.0 kg | 60.0 kg heavier | | [Growatt WIT 75K-H / WIT 75K-HU](https://comparepv.com/inverter/growatt-wit-75k-h-wit-75k-hu) | 75 kW | | | 140.0 kg | 80.0 kg heavier | | [Growatt WIT 75K-HU-US](https://comparepv.com/inverter/growatt-wit-75k-hu-us) | 75 kW | | | 153.0 kg | 93.0 kg heavier | | [Ginlong Solis S6-EH3P80K10-NV-YD-H](https://comparepv.com/inverter/ginlong-solis-s6-eh3p80k10-nv-yd-h) | 80 kW | 97.2% | 10 | 170.0 kg | +5.0 kW, 110.0 kg heavier | | [Growatt WIT 63K-A-US / WIT 63K-AU-US](https://comparepv.com/inverter/growatt-wit-63k-a-us-wit-63k-au-us) | 63 kW | | | 120.0 kg | -12.0 kW, 60.0 kg heavier | --- Source: https://comparepv.com/inverter/growatt-wit-75k-h-us-wit-75k-hu-us