Sungrow has launched its latest SG125CX-P3 series string inverter at Solar & Storage Live Africa 2026
It features multiple safety and reliability functionalities, such as AFCI, ground leakage, and PID recovery
It is rated at 125 kW and has a peak conversion efficiency of 98.5%
PV inverter and storage solution provider Sungrow has introduced its latest SG125CX-P3 series string inverter for commercial and industrial (C&I) applications at Solar & Storage Live Africa 2026.
The company says that the inverter is designed to address typical C&I challenges, such as partial shading, varied rooftop orientations, and non-uniform string configurations. Equipped with multiple MPPT channels and a proprietary real-time IV (voltage-current) scanning capability, it harvests solar energy even in partial shading or multi-oriented rooftop installations.
Without giving details about this technology, the company claims that by preventing current mismatch, it yields more than 2% higher energy, which would have been lost in conventional peers. It adds that a transformer-free architecture helps the inverter convert up to 98.5% of the harvested energy to up to 125 kW AC.
For operational safety, it features multiple built-in functions. Its arc-fault circuit interrupter (AFCI) automatically detects DC arc formation originating from the combiner boxes, faulty DC cables, or defective PV modules. Once an arc formation is detected, it quickly disconnects the faulty strings from the inverter to prevent fire-related safety hazards. During overcast conditions, early mornings, or in humid, moist environments, this inverter also monitors the insulation resistance (IR) of the connected strings before waking up. Upon detecting a low IR value, its ground-fault protection is activated within 15 ms and disconnects the PV array until the value goes up to a permissible limit. It also monitors the polarities of connected PV strings, helping in detecting reverse polarities, typically attributed to wrong workmanship. In addition, its built-in DC-bus fault protection ensures the DC-busbar healthiness in terms of electrical isolation, voltage, and current. For C&I operation in a variety of environmental conditions, it is enclosed with an IP66-rated enclosure, protecting against dust, moisture, or corrosion.
Given the floating-neutral architecture of a string inverter, the company has integrated potential-induced degradation (PID) recovery functionality in the inverter. This feature, which typically activates during nighttime, connects the opposite polarity of the PV string compared to the module’s embedded cell types (such as n-type) with the ground. During this operation, the affected modules’ polarized PID effects are reversed by injecting a small voltage of opposite polarity.
The commercialization details for this product are unknown at the time of the publication of this article.