IN Brief:
- Endoks Energy Systems began manufacturing at its new power conversion systems facility in Niğde on 16 October 2026.
- The facility produces converters and inverters for utility-scale battery energy storage and other grid-connected applications.
- Parent company Quality Power plans a progressive production ramp-up but has not disclosed plant capacity, production volumes or equipment ratings.
Endoks Energy Systems has started manufacturing power conversion equipment at its new facility in Niğde, Türkiye, expanding production capacity for utility-scale battery storage and other grid-connected applications. Manufacturing commenced on 16 October 2026, according to a regulatory announcement issued the following day by parent company Quality Power Electrical Equipments.
The facility is dedicated to power electronic converters and inverters, with output expected to increase progressively in line with operational plans and customer delivery schedules. Quality Power has not disclosed the plant’s annual production capacity, initial manufacturing volume, capital investment or specific converter ratings. The announcement confirms that production has begun rather than establishing that the facility is operating at its intended full capacity.
Quality Power acquired Endoks as part of its expansion into power quality and energy infrastructure equipment. The Turkish subsidiary already has experience in electrical control, grid applications and power quality systems, while the wider group manufactures equipment serving electricity generation, transmission, distribution and industrial power installations.
The Niğde operation adds manufacturing capability for active power conversion equipment, complementing the group’s existing portfolio. Quality Power says the facility will support its international battery energy storage order book, although it has not identified individual customers, allocated production volumes or announced new contracts arising from the manufacturing start.
Battery energy storage systems require power converters to exchange energy between DC storage equipment and AC electricity networks. Battery cells and associated modules store and release energy as direct current, whereas most grid connections operate using alternating current at specified voltage and frequency conditions.
A bidirectional power conversion system regulates the flow between those electrical domains. During charging, it converts AC power into controlled DC power suitable for the battery installation. During discharge, switching devices operate under a different control arrangement to deliver AC power into the connected network. The conversion equipment must coordinate its operating limits with the battery management system and the wider installation controls.
The power stage typically uses semiconductor switches arranged in inverter or converter circuits, with gate-drive electronics determining when each device conducts. Switching patterns regulate the resulting voltage and current, while inductors, capacitors and other components help control energy transfer, electrical ripple and harmonic content.
Semiconductor selection affects the electrical and thermal characteristics of the converter. Silicon insulated-gate bipolar transistors remain widely used in high-power installations, while silicon carbide devices can provide different switching and conduction characteristics in suitable designs. Endoks has not disclosed the semiconductor technology or topology selected for the equipment manufactured at Niğde.
The control system measures electrical quantities and adjusts switching commands in response to changes in battery conditions, grid demand and equipment temperature. Its response must remain coordinated with protection devices, filters and transformers, particularly during start-up, shutdown and changes in charging or discharging power.
Operation alongside a distribution or transmission network also requires compliance with applicable connection rules. These can include limits on harmonic emissions, fault behaviour, power quality and reactive power performance. The actual requirements depend on the location, network operator and classification of the installation, so compliance cannot be inferred merely from the presence of a commercially manufactured inverter.
Grid-connected storage equipment may be designed to provide several services. These can include shifting energy between periods of differing demand, supporting frequency control and managing power flows associated with renewable generation. The functions available at a particular site depend on the installed hardware, control configuration, network agreement and operating restrictions.
Heat generated within the converter has to be removed without exceeding semiconductor and component temperature limits. Conduction losses arise when current passes through switching devices, while switching losses occur during transitions between conducting and non-conducting states. Magnetic components, busbars and electrical connections introduce additional losses that influence the complete system’s thermal design.
Manufacturing therefore includes mechanical, electrical and thermal processes as well as electronic assembly. Power modules require controlled mounting and electrical connections, while insulation systems must provide the clearances needed for the intended operating voltages. Sensors and protective circuits must be checked to ensure that abnormal electrical conditions can be detected and handled appropriately.
Production testing may involve checking insulation integrity, protection responses, control behaviour and converter performance under defined loads. Equipment intended for connection to a utility-scale installation also requires suitable integration testing with its associated transformers, battery controls and supervisory systems. The specific test facilities and qualification procedures in place at Niğde have not been disclosed.
Power conversion manufacture differs from producing individual semiconductor components because the performance of the finished equipment depends on how its electrical and mechanical subsystems interact. Switching characteristics, busbar geometry, cooling arrangements and control algorithms can all influence efficiency, reliability and electromagnetic compatibility.
The start of operations gives Quality Power an additional manufacturing base for supplying complete conversion equipment. Its existing high-voltage and power quality activities may provide supporting expertise, but the October filing does not specify which product designs will be manufactured first or how the Niğde output will be divided between battery storage and other grid applications.
Quality Power expects production to increase as operational arrangements and customer schedules develop. Confirmation of individual equipment ratings, manufacturing capacity, production milestones and customer deliveries will provide the next measurable indications of the facility’s development.
