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The Solar Markt Group’s hybrid power plant, consisting of a solar farm with a peak capacity of 70 megawatts and an 80-megawatt-hour energy storage system, has begun operating in Hódmezővásárhely (southeastern Hungary).
The investment—developed without state subsidies on a commercial basis at a cost of approximately 28 billion forints (around 76.7 million euros)—is part of the company’s decarbonization portfolio with a total capacity of 140 megawatts. Imre Mécs, chairman of the Solar Markt Group said: “The investment in Hódmezővásárhely simultaneously serves the goals of domestic decarbonization, strengthening energy independence, and increasing the flexibility of the electricity grid. The exceptionally high-efficiency solar power plant and the associated battery energy storage system together form a state-of-the-art energy system that supports the more efficient use of renewable energy, the smoothing of production fluctuations, and the expansion of the company’s green energy supply.”
Solar Markt Group hybrid power plant inauguration in Hódmezővásárhely on September 24, 2026. L-R: Gábor Ferenczi, Péter Márki-Zay, Imre Mécs, James Li, Miklós Mormer, and Anton Raic. Photo: Tibor Rosta/MTI
Thanks to its battery backup, the power plant is capable of providing system-level balancing services to MAVIR in real time, thereby increasing grid stability. The system feeds the stored electricity into the grid when grid load and market demand are at their highest—such as during the evening peak period—thereby directly reducing the country’s dependence on imports and the need for fossil fuel power plants, the company said.
Grid connection is provided by a 40.32 MVA substation. The energy storage system consists of eight dedicated units, capable of delivering a total output of 40 MW and a capacity of 80 MWh.
The system can feed its full stored capacity into the grid within two hours if necessary, effectively smoothing out fluctuations in generation, according to the technical details of the project.
E.ON is responsible for the automated commercial optimization of electricity market and grid scheduling; and STEM, a San Francisco-based publicly traded company, provides AI-based energy storage and optimization, as well as the integration of individual units, which facilitates continuous, real-time data communication with the grid dispatch center and automatically decides when to initiate charging, storage, or feed-in cycles based on market prices and grid stability requirements.
At the commissioning of the power plant, representatives of Sungrow—one of the world’s largest manufacturers of solar inverters and energy storage systems and a company listed on the Shenzhen Stock Exchange—signed a strategic agreement with the Solar Markt Group.

Green Cloud, a member of the Solar Markt Group, sells the electricity generated at the Hódmezővásárhely solar power plant—an average of 105 GWh annually—directly to large domestic corporate consumers under long-term power purchase agreements, entirely on a market basis. The arrangement guarantees predictable, fixed energy costs for corporate partners while verifiably reducing their Scope 2 carbon dioxide emissions, thereby supporting increasingly stringent ESG compliance.
Based on information on the company’s website, the group commissioned its hybrid solar power plant in Szihalm, Heves County, in September 2024. The power plant has a nominal peak capacity of 69.8 MWp and an annual generation of 101.7 GWh. The solar farm is connected to an 80 MWh storage facility with a capacity of 40 MW.
The exact scale of the job cuts and production line relocations remains unconfirmed by any official source.Continue reading
Via MTI; Featured photo: MTI/Rosta Tibor
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