Cyber-secure large-scale battery system
9 February 2026
TESVOLT, a provider of battery storage systems, project development and energy trading services, has launched a new 5 MWh Tallon storage container. The large-scale battery system increases the cybersecurity of battery parks and co-location storage projects through a proprietary battery park control system and European inverters. Municipal utilities benefit from a one-stop shop: from planning and installation to operation, monitoring, services and power trading – all from a single provider.
“Today, many battery containers hardly differ from one another, and almost all of them come from Asia. We also source them there, selecting robust, high-performance systems – but then we do something differently from many others: we integrate our own battery park control system, which provides significantly higher protection against cyber attacks,” explains Simon Schandert, CTO and co-founder of Tesvolt. “This control system incorporates several years of experience gained from numerous battery park projects.”
All data connections of the Tesvolt Energy Controller EZA pro L to the internet, for example, are exclusively routed via dedicated VPN tunnels to prevent external manipulation. In addition, outbound data connections are designed as one-way links only, and the plant controller is protected against direct internet access by dedicated hardware.
Thanks to its modular concept, the Tallon storage container provides greater flexibility in planning, operation and later expansion of storage systems.
