Solis S6 20kW Repower Solar Inverter - 3 Phase with DC

Solis S6 20kW Repower Solar Inverter – 3 Phase with DC is a commercial three-phase string inverter designed for fast, like-for-like replacement projects where existing cabling and system layouts need to be retained. It features 4 MPPTs with 8 strings, supports up to 30kW recommended PV power, and delivers 20kW rated output power, making it well suited to repowering and upgrading commercial solar systems. The inverter is built for straightforward retrofit work, with support for 50mm² AC cable size, a lightweight slim-body design, and dual independent RS485 ports for communication with multiple devices.

The unit offers a maximum input voltage of 1100V, MPPT operating range of 180–1000V, maximum input current of 4 × 42A, and maximum efficiency of 98.6%. On the AC side, it operates at 3/N/PE, 230V / 400V, with 29.0A rated output current and a power factor greater than 0.99. Protective features include DC reverse-polarity protection, short-circuit protection, anti-islanding protection, DC Type II / AC Type II surge protection, string monitoring, I/V curve scanning, and an integrated DC switch, helping support reliable operation in demanding commercial environments.

The inverter is also built for harsh outdoor conditions, with IP66 protection, C5 anti-corrosion level, intelligent fan cooling, and an operating temperature range of -25°C to +60°C. It uses MC4 DC connectors, OT AC terminals, and offers LED indicator plus Bluetooth + app monitoring, with RS485 as standard and optional Wi-Fi or GPRS communications. With compact dimensions of 508 × 612 × 288 mm and a weight of 34.9kg, it provides a practical solution for commercial repowering projects that need strong performance, flexible communications and simple replacement of existing inverter installations.