EPC Energy Oy designs, manufactures, and supplies power containers and high-power load units installed in the Finnish transmission grid to support system balancing. The containers are remotely controlled, typically via a 5G connection. When activated, the power containers consume surplus power from the transmission grid. The load element primarily consists of a heating system, either air-based heating or alternatively water-based heating.

EPC Energy Oy also offers battery energy storage systems (BESS) in cooperation with selected partners. All systems operate using intelligent control technology that optimizes power usage and, when required, load scheduling and output levels.

The power containers and devices are available in various sizes. The smallest units start at 100 kW, and the largest exceed 2,000 kW. Supported voltage levels include 400 V, 690 V, 10 kV, and 20 kV. The total installed capacity can be adjusted according to site conditions and available electrical capacity. There is no fixed upper limit to total power, as multiple units can be installed in parallel as long as sufficient capacity is available. Containers are suitable for outdoor installation and can also be stacked.

When operating, the containers and devices generate heat energy almost equivalent to their electrical load, which can be utilized, for example, for supplementary space heating. Air-based heat is blown directly into the desired space. In water-heated systems, the heat energy can be connected either to a building’s hydronic heating system or to a district heating network.