| Cell and Battery Safety | IEC 62619 | Whether the industrial lithium battery system has been evaluated for electrical, mechanical, thermal, and abuse-related safety risks. | Applicable certification or test report | IEC 62619 is a key international safety standard for secondary lithium cells and batteries used in industrial applications, including stationary energy storage. | Certificate, test report, scope of certification, cell model, battery model, and issuing laboratory. |
| Stationary Energy Storage Safety | UL 1973 | Whether the complete battery module or rack has been assessed for stationary and auxiliary power applications. | Certification where required by the project | UL 1973 evaluates batteries used in stationary energy storage and other auxiliary power applications. Requirements may vary by market and installation type. | Valid certification, product listing, construction details, and the exact rack configuration covered. |
| System-Level Fire Testing | UL 9540A | Whether thermal runaway propagation and fire behavior have been tested at the cell, module, unit, or installation level. | Test data matched to the proposed system | UL 9540A is a test method for evaluating thermal runaway and fire propagation characteristics. It is not a general product certification. | Complete test report, tested chemistry, module size, rack layout, spacing, ventilation, and suppression conditions. |
| Power Conversion Safety | IEC 62477-1 | Safety design of the power conversion equipment, DC bus, insulation system, protective circuits, and accessible energized parts. | Applicable inverter or PCS compliance | This standard addresses safety requirements for power electronic converter systems and helps reduce electric shock, fire, and overvoltage risks. | Declaration of conformity, dielectric-strength results, insulation test records, and protective-device specifications. |
| Transport Compliance | UN 38.3 | Whether the lithium battery type has passed transport tests such as altitude simulation, thermal cycling, vibration, shock, overcharge, and forced discharge where applicable. | Required before international shipment | UN 38.3 is generally required for transporting lithium cells and batteries by air, sea, road, or rail under applicable dangerous-goods rules. | UN 38.3 test summary, battery type identification, shipping classification, and safety data sheet. |
| Installation and Fire Protection | NFPA 855 and Local Fire Codes | Indoor or outdoor location, separation distances, ventilation, fire detection, suppression, emergency response, and total installed energy. | Site-specific compliance review | Installation rules depend on system capacity, building type, local authority requirements, and the selected battery chemistry. | Layout drawings, fire risk assessment, emergency plan, ventilation calculations, and approval from the authority having jurisdiction. |
| Ingress Protection | IEC 60529 | Protection against dust and water at the intended installation location. | IP54 minimum for protected indoor areas; higher rating when required | An IP rating must match the enclosure design and actual environment. It does not by itself prove fire safety or corrosion resistance. | IP test report for the final enclosure, gasket design, cable-entry details, and installation limitations. |
| Battery Management System | Functional safety and system requirements | Cell voltage, temperature, current, state of charge, state of health, balancing, fault logging, contactor control, and emergency shutdown. | Independent protection layers with event records | A properly designed BMS helps prevent overcharge, over-discharge, overheating, short circuit, and operation outside approved limits. | BMS protection matrix, alarm list, communication protocol, firmware-control process, and sample fault logs. |
| Nominal Energy | Manufacturer datasheet and test conditions | Rated voltage, rated ampere-hours, number of parallel strings, usable depth of discharge, and DC bus limits. | Usable energy clearly stated, not only nameplate energy | Usable energy depends on operating limits, reserve state of charge, temperature, power level, and battery degradation. | Capacity test report, calculation formula, operating SOC window, and guaranteed usable-energy value. |
| Round-Trip Efficiency | Defined test protocol | Whether efficiency includes the battery only or the complete battery-plus-PCS system, and at what power, temperature, and SOC range it was measured. | Typically 85% or higher for a complete AC system | Efficiency affects electricity losses, operating cost, cooling demand, and the required size of the energy-storage system. | Independent performance report showing charge efficiency, discharge efficiency, auxiliary consumption, and test conditions. |
| Power Capability | Continuous and peak power ratings | Continuous charge and discharge power, short-duration peak power, C-rate, power-factor range, and response time. | Ratings matched to the server load profile | Server facilities may require high short-term power, fast transfer, and stable output during grid disturbances. | Power test curves, inverter datasheet, transient response results, and overload-duration limits. |
| Cycle Life | Defined end-of-life condition | Number of cycles, depth of discharge, ambient temperature, charge and discharge rate, rest periods, and end-of-life capacity. | At least 6,000 cycles to 80% retained capacity under stated conditions | Cycle-life figures are meaningful only when the test conditions and capacity-retention threshold are clearly disclosed. | Life-test report, degradation curve, warranty conditions, and guaranteed end-of-life capacity. |
| Operating Environment | Environmental performance specification | Permitted temperature, humidity, altitude, condensation limits, cooling method, and derating above the rated temperature. | Approximately 0–45 °C for charging and −20–50 °C for discharging, subject to design | Temperature outside the approved range can reduce available power, accelerate degradation, or trigger protective shutdown. | Environmental test records, thermal-management design, derating curves, and installation manual. |
| Scalability and Redundancy | System architecture specification | Maximum parallel racks, rack-level isolation, independent BMS operation, hot-swappable components, and communication redundancy. | Rack-level fault isolation and modular expansion | Modular architecture can improve availability and simplify maintenance without shutting down the entire energy-storage system. | Single-line diagram, communication topology, isolation procedure, expansion limits, and failure-mode analysis. |
| Cybersecurity and Communications | IEC 62443 principles and project requirements | Role-based access, password policy, encrypted communication, secure firmware updates, audit logs, remote-access control, and network segmentation. | Documented controls with remote access disabled by default | Battery racks connected to facility networks can introduce operational and cybersecurity risks if access is not controlled. | Cybersecurity statement, software-update policy, network diagram, access-control procedure, and vulnerability-response process. |
| Warranty and Serviceability | Commercial warranty terms | Warranty duration, throughput limit, retained-capacity guarantee, response time, spare-parts availability, and service coverage in the destination country. | Clear performance warranty with measurable exclusions | A technically compliant rack may still create operational risk if replacement parts, firmware support, and qualified service are unavailable. | Signed warranty, service-level agreement, spare-parts list, maintenance schedule, and escalation contacts. |
