IEC 62443
The international standard series for industrial cybersecurity, covering security requirements for industrial automation and control systems (IACS). Increasingly required for BESS plants connected to critical infrastructure. Defines four security levels and prescribes requirements for both operators and product suppliers.
In energy storage
In a BESS context, IEC 62443 is applied by dividing the OT network into security zones — typically separating the BMS, PCS controls, SCADA, and site-level EMS — with controlled conduits (firewalls, authentication) between them. The target security level (SL-1 through SL-4) for each zone is determined by a risk assessment, and both the system integrator and component suppliers must demonstrate compliance with the requirements for their respective roles.
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