CEA Proposes Mandatory External Safety Audit Framework for BESS Installations
The Central Electricity Authority has issued a draft framework for mandatory external safety audits of Battery Energy Storage System installations, proposing standardised audit procedures, technical checklists and compliance requirements to enhance the safety and reliability of grid-scale energy storage projects.
July 15, 2026. By Mrinmoy Dey
The draft document introduces a standard format for the 'BESS External Safety Audit Report', requiring audit agencies to prepare detailed reports covering an executive summary, project background, audit methodology, occupational safety and health (OSH) systems, statutory compliance, technical evaluations, field observations, recommendations, risk categorisation and timelines for corrective actions. The report must also include verification of applicable laws, licences, operational records and ISO 45001 certification, where applicable.
A key feature of the framework is the introduction of a dedicated BESS-specific technical checklist, which auditors will use to evaluate compliance with the latest CEA Technical Standards for Construction of Electrical Plants and Electric Lines (Amendment) Regulations, 2026, CEA Safety Regulations, 2026, the Ministry of Power's BESS Guidelines, CERC Connectivity Regulations and CEA Metering Regulations.
The checklist requires verification of site suitability, including whether projects are located near geological fault lines, flood-prone or avalanche-prone regions, as well as the adequacy of access roads, equipment spacing, control room arrangements and battery rack isolation mechanisms. It also mandates verification of segregation between DC busbars, inverter rooms and AC switchgear to minimise fault propagation.
The draft also places significant emphasis on operational monitoring and digital supervision. Auditors will be required to verify whether BESS facilities provide real-time monitoring of parameters such as DC input voltage and current, battery and container temperatures, AC output, humidity, ambient temperature, power factor and reactive power through SCADA systems. The framework also requires data associated with protection events such as Low Voltage Ride Through (LVRT) and High Voltage Ride Through (HVRT) operations to be retained for at least 90 days and recorded at a minimum sampling rate of 1,000 samples per second.
Safety provisions receive extensive attention in the draft. Auditors must verify the presence of explosion protection systems, forced ventilation, automated louvers, ingress protection, automatic fire suppression systems, spill containment arrangements, emergency lighting, CCTV surveillance and motion sensors. The framework also requires verification of surge protection against lightning and switching events, along with adequate heating, ventilation and air-conditioning systems to maintain battery performance under all climatic conditions.
The draft further specifies a comprehensive documentation review. BESS operators will be required to maintain certifications covering battery cells, battery systems, transport safety, system-level integration, thermal runaway testing, power conversion systems, electromagnetic compatibility, anti-islanding protection, environmental testing, CEA/CEIG safety clearances, transmission connectivity tests and metering calibration records. These documents will form part of the external audit process.
In addition to external verification, the framework introduces a detailed self-certification mechanism for plant owners. Developers will be required to certify that their systems comply with service life requirements, seismic design standards, environmental protection, weatherproofing, corrosion resistance, performance guarantees, battery cycling capability, minimum depth of discharge, round-trip efficiency, protection coordination and operational parameters.
The self-certification also extends to Battery Management Systems (BMS), requiring confirmation that the systems continuously monitor voltage, temperature, thermal runaway, current and abnormal operating conditions at cell, module and rack levels. Developers must also certify that the BMS can automatically stop charging or discharging when temperatures exceed OEM specifications, while the power conversion system must support fully automatic operation, synchronisation with the grid and self-protection during abnormal operating conditions.
The proposed audit methodology requires every external audit team to comprise at least three auditors with expertise in electrical engineering, mechanical engineering and fire and safety engineering or industrial safety. One auditor must be a Lead Auditor certified under IS-18001/ISO-45001, while another must possess at least ten years of experience in power plant operations, commissioning or hazardous process industries. Each external audit must include a minimum three-day field inspection, amounting to at least nine man-days of auditing.
Under the draft procedure, auditors will conduct Occupational Health and Safety (OH&S) audits in accordance with IS 14489:2018, perform technical verification using the CEA checklist, inspect all plant facilities through field visits and document observations along with risk ratings categorised as high, medium or low. Every recommendation must include a defined compliance timeline, and the final audit report must be jointly signed by both the audit agency and the BESS plant head before submission to the CEA.
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