Rosatom has unveiled a new Russian-made inverter prototype for solar power plants, marking a significant step in the country’s clean energy and technology development efforts.
The inverter was developed by Parus Electro LLC, a subsidiary within Rosatom’s Automatic Process Control Systems and Electrical Engineering Division. It is designed to convert direct current generated by solar panels into alternating current for reliable and efficient transmission through power grids. The system delivers a high efficiency rate of 98.3% and supports integration with energy storage systems in both grid-connected and hybrid configurations.
The prototype is available in 200 kW and 350 kW capacities and features a modular design that allows key power supply components to be replaced independently, without dismantling the entire unit. This significantly reduces maintenance time and helps minimise energy losses. The inverter can manage up to eight independent solar panel strings, enabling more stable power generation during low-sunlight conditions such as cloudy weather or winter months.
Built for harsh operating environments, the inverter is engineered to function in temperatures ranging from –50°C to +65°C, ensuring stable voltage supply even in remote or challenging locations. It is suitable for a wide range of applications, from large-scale industrial solar plants to smaller rooftop installations, and supports advanced reactive power management as well as seamless integration with energy storage systems.
With over 90 per cent of its components sourced locally, Parus Electro plans to manufacture the inverter at its own facilities, with serial production expected to begin in 2026.
The unique feature of the first Russian inverter is its modular structure, making it possible to replace the power module without dismantling the entire equipment. It reduces the maintenance and repair time from dozens of hours to several minutes. The localization degree of components is 90-95%.
The inverter developed by Rosatom is operating with the use of eight independent strings and controls small groups of panels individually. If a group loses efficiency because of shade, snow or clouds, the others continue operating at full capacity. This improves the stability of power generation in winter and in dull weather and increases the total number of generation hours over a day. The string inverter is suitable for commercial ground-based solar power plants and for small solar power units on roofs of buildings. It supports adaptive control of reactive power for requirements of a specific grid operator and interaction with power banks. Parus Electro is going to start series production of the device as early as in this year