UK ESQCR 2002 Regulation 31 Incident Notification and Safety Reporting Guide

Key Takeaways

• Failure to understand statutory reporting duties is a common compliance risk for operators of solar and battery energy storage systems.
• The first step in any incident is to determine if the event meets the specific triggers outlined in Regulation 31.
• Immediately isolate hazardous solar DC and AC circuits following any explosion, arc flash, or thermal runaway event.
• Any incident involving serious injury, fatality, or significant equipment damage requires formal reporting and professional investigation; do not attempt to resolve such events without expert involvement.

What incidents must be reported under UK ESQCR 2002 Regulation 31?

Regulation 31 of the Electricity Safety, Quality and Continuity Regulations 2002 (S.I. 2002/2665) mandates notification to the Secretary of State for specified dangerous electrical occurrences. These include fatalities, injuries, fires, and explosions involving electrical generation or distribution equipment. This regulation establishes critical statutory reporting duties for UK solar farm operators, commercial battery storage (BESS) managers, and distributed generation facilities.

Identifying a Reportable Incident

Understanding whether an event constitutes a "specified event" under Regulation 31 is crucial for compliance. Follow these steps to assess an incident:

1. Assess the incident type: Determine if the event falls under the categories of "the death of any person other than a person engaged by the gene" or "an injury (including any electric shock) to any person other than a person engag". It also includes "any fire; or (iv) any explosion or implosion".
2. Identify involved equipment: Check if the incident involves "a network or equipment which is in the ownership of, under the control of, or used by, the generator", distributor, or meter operator. This includes "generating, transforming, control or carrying of energy up to and including the supply terminals".
3. Confirm reporting party status: Verify if your organization is an electricity generator, distributor, or meter operator, as these are the "Reporting Parties" mandated to notify.
4. Consider consumer installation scope: The regulation also applies where "the event involves a consumer's installation which is connected to the distributor".

Reportable Events and Notification Requirements

Regulation 31 specifies various event triggers and the parties responsible for reporting them. This table summarizes the key requirements:

Compliance and Reporting Procedures

Effective incident management for solar and BESS installations requires robust procedures to meet Regulation 31 obligations.

Establishing Reporting Protocols

• Maintain 24/7 incident logging: Implement systems to record exact timestamps, electrical parameters, and protection trip flags for all incidents. This data is crucial for statutory reports.
• Develop escalation pathways: Establish clear emergency contact directories for DNO control centres and the Secretary of State reporting desk. Ensure all relevant personnel know the process for notifying the Secretary of State for Energy Security and Net Zero (via HSE / Engineering Inspectorate).
• Document thoroughly: For any "Reportable Event Failure", ensure complete statutory event reports are submitted. Inadequate Incident Documentation, such as lacking equipment ownership details, voltage level, or root cause particulars, can lead to non-compliance. Record photographic evidence and maintain detailed logs.

Operational Considerations for Distributed Generation

• Commercial Rooftop Solar & BESS Installations: For incidents like a Battery storage thermal runaway fire or inverter flashover, ensure statutory Regulation 31 notification to authorities is not overlooked. These installations are connected to DNO Low/High Voltage Networks.
• Ground-Mounted Solar Farms & Substation Connections: Events such as Generator-Operated High Voltage Switchgear failures or Inverter Transformer Explosion/Fire Reporting require immediate attention.
• Distributed Generation & Microgrid Assets: For Parallel Generators and Private Wire Networks, ensure Safety Incident Escalation procedures are in place for serious electric shocks or other specified events. For example, a Solar PV DC ground fault causing building fire on a consumer's installation requires formal DNO/generator reporting under § 31(1).

For further guidance on related regulatory requirements, you can consult our guides on UK ESQCR 2002 Regulation 32 Supply Interruption Reporting and Compliance and UK ESQCR 2002 Regulation 28 Network Characteristics and Earthing.

Safety: Immediate Actions for Electrical Incidents

Safety is paramount when dealing with electrical incidents. The following actions are critical:

• Isolate hazardous circuits: Immediately isolate hazardous solar DC and AC circuits following any explosion, arc flash, or thermal runaway event. This prevents further injury or damage.
• Restrict access: Ensure only authorized, high-voltage certified personnel access damaged transformer or switchgear enclosures. Electrical equipment can remain energized or store dangerous residual energy even after initial isolation.
• Document and analyze: Retain root cause analysis (RCA) and forensic engineering reports for statutory safety audits under ESQCR Regulation 31. This documentation is vital for both compliance and preventing future incidents.

When to call a technician instead

Regulation 31 outlines statutory duties, not DIY fixes. Any incident that triggers a reporting requirement under Regulation 31, especially those involving injury, fatality, fire, or explosion, necessitates professional investigation and reporting. Do not attempt to repair or tamper with equipment involved in a reportable incident before it has been thoroughly investigated by qualified personnel and, if required, by regulatory authorities. Failure to notify the Secretary of State following an electric shock, arc flash injury, or fire involving generation equipment can lead to serious legal consequences.