Solis 150kW Three Phase String Inverter: The C&I Workhorse Built for High-Power Projects

Commercial and industrial solar projects have outgrown entry-level inverters. When you're designing a rooftop system for a factory, a logistics hub, or a large commercial complex, you need an inverter that matches the scale — high DC input, smart string monitoring, real-world safety features, and the efficiency to justify the investment over 25 years.

The Solis S6-GC3P 150kW Three Phase String Inverter is built exactly for that application.

What Makes It Stand Out

98.8% peak efficiency — and it holds it. The Solis 150kW reaches a maximum efficiency of 98.8% and an EU efficiency of 98.3%, meaning minimal energy is lost in conversion across the operating range — not just at ideal lab conditions.

7 MPPTs with 54A per channel. Seven independent MPPTs with a maximum input current of 54A per channel make this inverter perfectly matched to today's high-power bifacial modules — including 182mm and 210mm formats. Each MPPT can handle up to 3 strings, giving designers flexibility to handle complex rooftops with mixed orientations or partial shading.

Over 150% DC/AC ratio support. Running a higher DC/AC ratio means more energy harvest during morning, evening, and cloudy periods — lowering the overall cost per kWh generated over the system's lifetime. The Solis 150kW supports this from day one.

IP66 rated. Fully sealed against dust and high-pressure water jets, the Solis 150kW is built for outdoor installation in demanding environments — including the dusty, humid, and high-temperature conditions common across MEA.

Operates from -30°C to +60°C. Intelligent fan cooling keeps the unit running at full performance across a wide temperature range, up to an altitude of 4,000m. For rooftop installations in the Gulf or high-altitude sites in East Africa, this matters.

Safety Features That Matter on Site

The Solis 150kW includes a full suite of protection functions that reduce risk at the installation level:

AFCI protection (optional) detects arc faults in DC wiring — one of the leading causes of solar system fires — and shuts down the affected string before damage occurs.

Intelligent AC-DC terminal temperature monitoring catches overheating at connection points before it becomes a problem, adding a layer of protection that most string inverters at this price point don't include.

Smart I-V curve scanning allows remote diagnosis of string-level performance without sending a technician on site — reducing O&M costs significantly over the life of the system.

PID recovery function (optional) works overnight to counteract potential-induced degradation in panel strings, preserving long-term system yield.

Designed for C&I, Ready for the Solis Cloud

Every Solis 150kW connects to the Solis Cloud platform for remote monitoring, performance analytics, fault alerts, and firmware upgrades — all manageable from a browser or mobile app. For EPC contractors and O&M teams managing multiple sites, this centralised visibility is a significant operational advantage.

Who Is It For?

The Solis 150kW is the right specification for commercial rooftop systems from 200kWp upward, industrial facilities running continuous high-load operations, carport and ground-mount installations requiring multi-MPPT flexibility, and EPC contractors who need a reliable, globally certified inverter with strong local support.

The Solis 150kW Three Phase String Inverter is available through Nastech Solar. Contact our team to discuss availability and pricing — or download the full datasheet for complete technical documentation.