Invertor Security: Difference between revisions

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== Executive Summary ==


Assessment activities identified recurring weaknesses in inverter deployments, including hidden communications systems, insecure default configurations, poor visibility, and undocumented connectivity. These issues present both cybersecurity and grid-reliability concerns.
== Key Findings ==
=== Rogue and Undocumented Components ===
* Unexpected wireless devices were detected during assessments.
* Undocumented 868 MHz and 900 MHz communications were observed.
* Cellular modems were found despite manufacturer assertions that they should not be present.
=== Hidden Cellular Connectivity ===
* Quectel BG95-M1 LTE modem with SIM card identified within an inverter.
* ESP32 microcontroller observed interfacing with inverter communications.
* Devices were observed attempting cellular communications.
=== Configuration Weaknesses ===
* Default passwords remained in use.
* SSH services were enabled.
* Open MongoDB and NTP services were identified.
* External DNS configurations were observed.
== Lessons Learned ==
* Insecure default configurations create immediate risk.
* Credential-lockout and throttling protections are often absent.
* Outdated firmware increases exposure to known vulnerabilities.
* Manufacturer security assurances cannot always be independently validated.
* Hidden communications increase lifecycle and supply-chain risk.
== Recommendations ==
* Conduct physical walkdowns and validate inventories.
* Remove or disable unnecessary wireless functionality.
* Implement secure reference architectures.
* Standardize commissioning security checklists.
* Perform network analysis, red-team assessments, and IDS reviews.

Latest revision as of 14:59, 23 October 2026

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