The Problem
The NIS2 Directive and Cyber Resilience Act are making supply-chain security mandatory for energy infrastructure. Your MQTT broker sits between your SCADA host and every DER, substation RTU, and smart meter in your network. Every dependency it carries is a compliance burden.
How RelayQ Solves This
Zero dependencies = zero supply-chain risk. When the next Log4j hits, your broker isn’t affected. Your SBOM is one line. Your compliance team can close the audit in an afternoon.
Sparkplug B for utility SCADA. Sparkplug B is gaining adoption in utility networks for standardized device communication. RelayQ validates every message at ingress — no malformed data reaches your SCADA host.
Built for air-gapped networks. The non-TLS build has literally zero external code. Deploy on isolated OT networks with confidence that no dependency phones home or requires internet access for updates.
Key Features for Energy
| Feature | Benefit |
|---|---|
| Zero runtime dependencies | NIS2 / CRA supply-chain compliance |
| Default-deny ACL | Segment DER traffic from control traffic |
| IP allowlist/blocklist | Only known substations can connect |
| Brute-force protection | Prevents credential stuffing on exposed endpoints |
| Audit logging | Append-only log for regulatory evidence |
| TLS 1.3 + mTLS | Mutual authentication for substation RTUs |
Deployment
- Substation gateway: 826KB binary on hardened Linux
- Control center: Docker container with Prometheus monitoring
- DER aggregator: systemd service with WAL persistence
Next Steps
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