Sigenergy has launched a 166 kW IP66-rated inverter for C&I solar and storage, featuring nine MPPT trackers and flexible AC/DC connections. The launch coincided with the opening of the Nantong Smart Energy Center, a 136,000 m² facility for R&D, manufacturing and global supply.
Chinese battery manufacturer Sigenergy has unveiled a 166 kW inverter for commercial and industrial (C&I) PV installations.
The company said the product is designed to increase power density and system efficiency through updated power electronics, with the aim of simplifying integration for companies deploying solar and storage together.
The IP66 rated inverter measures 1,019mm x 668mm x 340mm and weighs 100kg. It supports a maximum PV input power of 270 kW and a DC input voltage of up to 1,100 V. The MPPT voltage range covers 160–1,000 V, with nine MPPT trackers, each capable of handling two PV strings. The maximum input current per MPPT is 40 A, with a short circuit current capacity of 60 A.
On the AC side, the inverter delivers a nominal power of 150–166.6 kW, with a maximum apparent power of 165–183.3 kVA, depending on the grid voltage. It supports three-phase connections of 380, 400 and 480 Vac, with rated output currents up to 278 A, providing flexibility for various grid configurations.
The unit can reportedly achieve a peak efficiency of 98.7%. The smart air cooling system enables stable operation at -30 C to 60 C, with storage tolerances down to -40 C. Nighttime power consumption is less than 4 W.
The new inverter can operate at altitudes up to 5,000 m, with performance degradation starting at 4,000 m, making it suitable for high-altitude solar farms, the company said.
Safety features include DC reverse polarity protection, insulation monitoring, residual current monitoring and arc fault circuit interruption. On the AC side, standard protections include overcurrent, overvoltage, short-circuit protection, Type II overvoltage protection, and anti-islanding functionality.
Connectivity options include WLAN, Fast Ethernet, RS485 and cellular modules (4G/3G/2G).
The launch of the new product coincided with the inauguration of Sigenergy’s Nantong Smart Energy Center in Jiangsu Province. The company described the facility as a new manufacturing backbone for global expansion and a physical anchor for its “AI in All” strategy.
The Nantong site covers 136,000 m² and represents an investment of CNY 500 million ($72.7 million). Sigenergy said the facility has an annual production capacity of more than 300,000 inverters and battery packs and is designed as an integrated center combining R&D, intelligent manufacturing, global supply and energy management, rather than a conventional single-function factory.
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