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Mayma Solar Power Plant

Russia's first power plant built on heterojunction PV-modules

Russia's first solar power plant built on heterojunction PV-modules. As a result, Russia joined Japan and Korea on the list of countries using heterojunction technology on an industrial scale.

Heterojunction technology allows up to 15% more power generation from the same area and significantly reduces the cost of constructing a solar power plant — the higher efficiency means that fewer modules need to be mounted. Production of the next-generation high-performance modules began in Russia at our plant in Novocheboksarsk in 2017. The efficiency of the solar cells on these modules exceeds 23%, which is one of the highest rates in mass production in the world.

The Mayma Solar Power Plant is located in the Altai Republic and consists of three phases: the first two phases, with a total capacity of 20 MW, were built in 2017; the final 5 MW were commissioned in April 2019.


The average annual output of the Mayma Solar Power Plant is 30 million kWh, which is comparable to the annual electricity consumption of the Maiminsky District, which is home to more than 30,000 people. The power plant's operator saves 6 million cubic meters of natural gas annually and prevents 11,000 tons of carbon dioxide from being released into the atmosphere.

25 MW
30 million kWh

In 2019, a system to remotely control operation of the power plant was brought into commercial operation at the Mayma Solar Power Plant. Remote control of the power plant's active and reactive capacity increases the responsiveness of control actions intended to bring the operational parameters of the power plant into acceptable limits while work is conducted to eliminate or prevent the spread of outages in the power grid.

To implement the project to enable remote control of power generation at the Mayma Solar Power Plant, a joint schedule was worked up, tests were performed, and operational testing of remote control of the Mayma Solar Power Plant's operating modes was conducted from the Novosibirsk Regional Dispatcher Directorate. Operational testing of the system was carried out in accordance with the approved plan, which calls for operations to change the solar power plant's active and reactive power generation.