Growatt WIT 50-100kW is a three-phase grid-connected hybrid inverter designed for commercial and industrial installations, where grid flexibility and energy storage integration are key. These devices reliably power demanding loads and support backup supply through built-in UPS and black start functionality, facilitating the protection of critical circuits without additional solutions.
The WIT 50-100kW utilizes multiple MPPTs, effectively aiding in maximizing energy yields under varying panel orientations, unequal string configurations, or partial shading-each tracker operates independently, minimizing mismatch losses. High European efficiency translates to more energy delivered under typical operating conditions in Poland, not just in laboratory settings.
Monitoring the installation is possible via various communication channels (e.g., WiFi, Ethernet) and a surveillance platform offering parameter and alarm views. It is also compatible with high-voltage energy storage systems, supporting popular battery technologies. The series meets required market certifications, with warranty terms depending on the region and installation documentation.
Ranking
Specifications
Pros and cons
The WIT 50K supports 7 independent MPPTs (8 for the 63K, 10 for the 75K/100K) at a DC/AC ratio of up to 2.0. Each tracker operates independently across a 180-800 V input range, meaningfully reducing mismatch losses on installations with multiple roof orientations or partial shading - a practical advantage for C&I systems.
The built-in UPS module with black-start functionality - enabling startup without grid voltage - eliminates the need for external uninterruptible power supplies on critical circuits, simplifying system design and reducing the CAPEX of industrial installations.
The series supports 110% continuous AC overloading and 100% unbalanced phase loading - a key feature for commercial installations with asymmetric current draw such as production lines and data centers, where stable operation under unequal phase distribution is required.
The IP66 ingress protection rating allows direct outdoor installation without an additional enclosure. Integrated Type II surge protection on both the DC and AC sides reduces damage risk and satisfies installation standard requirements without the need for external surge protective devices.
Growatt Polska operates an authorized service center backed by a domestic (non-Chinese) warranty holder, with a repair turnaround of approximately 5 days and availability 7 days a week from 08:00 to 20:00. The declared field failure rate for the series is 0.54%, supported by service data collected by the Polish distributor MP Solar Group.
Growatt does not appear on the BloombergNEF Tier-1 bankable inverter manufacturer list (confirmed: tier_1_bankable: false). For C&I projects above approximately 500 kWp financed through investment loans or leasing, certain banks and funds require Tier-1 status - this may complicate financing structures or necessitate additional collateral.
The WIT 100K weighs 160 kg, significantly more than comparable competing units such as the Sungrow SG110CX (~82 kg) or the SMA CORE2 100 (~112 kg). This requires specialized lifting equipment, increasing costs and complicating installation logistics on flat roofs.
Alternatives
About the WIT 50-100kW series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.