Modular containerized battery storage with capacity scalable in 255 kWh steps and power from 80 to 300 kVA. It includes an integrated EMS with an EU-based cloud, and supports an online-UPS topology as well as off-grid operation with autonomous PV control via frequency or communication. Increasing the capacity requires no new grid-connection application. Developed and manufactured in the Czech Republic, with an emphasis on repairability, technical support and client software customization.