For commercial and industrial (C&I) energy storage systems, safety is not optional. A failure in these systems does not just mean lost power; it can mean fire, equipment damage, or serious harm to people. That is why, before purchasing or deploying any C&I energy storage system, the first question to ask is always: Does it have the right safety certifications?

Key Safety Certifications for C&I Energy Storage Systems

Safety certifications are proof that a product has been tested and verified to meet standards. Different certifications apply depending on where a system is deployed. Here is a clear list of some of the most important certifications:

Europe

• IEC 62619:2022: This is the safety standard for secondary lithium cells and batteries used in industrial applications, including C&I energy storage. It ensures protection against risks such as overcharging, short circuits, and thermal issues.
• IEC 63056:2020: This standard adds additional safety requirements for secondary lithium-based battery systems used in C&I energy storage systems.
• EN IEC 61000-6-2:2019: This standard covers electromagnetic compatibility (EMC) immunity for industrial environments. It ensures the system can operate reliably without being disrupted by external electrical interference — a critical requirement in busy commercial or industrial settings.
• EN IEC 61000-6-4:2019: This standard sets emission limits, ensuring the energy storage system does not generate electromagnetic interference that could disrupt other equipment nearby.
• IEC 61727:2004: This standard defines the characteristics and requirements for connecting photovoltaic systems to the utility grid. For C&I storage systems that operate alongside solar installations, this certification is an important baseline.
• IEC 62116:2014: This covers the testing procedure for islanding prevention measures in grid-connected PV systems. It ensures the system safely disconnects from the grid during a power outage.
• IEC 62477-1: This standard addresses the safety requirements for power electronic converter systems and equipment. It covers protection against electric shock as well as thermal and mechanical safety requirements.

It’s worth noting that individual European countries may have their own grid connection requirements on top of these standards, so buyers should always verify local regulations as well.

United States

• UL 9540A: This is widely regarded as one of the highest safety standards in the energy storage industry at the system level.
• UL 9540: This is the standard for the overall safety of energy storage systems. It evaluates the complete system, including the battery, inverter, controls, and enclosure, ensuring all components work together safely.
• UL 1973: This standard focuses on the battery pack, covering the safety of batteries used in stationary applications. It evaluates performance, reliability, and resistance to conditions such as overcharge, short circuit, and extreme temperatures.

Australia

• IEC 62109-1:2010: This standard establishes the general safety requirements for power conversion equipment in solar PV systems, addressing fundamental risks like electric shock, fire, and mechanical hazards.
• IEC 62109-2:2011: This part defines the specific safety requirements for PV inverters, building upon the general rules of Part 1 to address the unique risks of DC-to-AC conversion. It focuses on critical protections such as grid interaction safety, ground fault detection, and isolation requirements to prevent injury during operation or maintenance.
• AS/NZS 4777.2:2020+A1: This is the Australian and New Zealand standard for grid connection of energy systems via inverters. It sets out the specific requirements for inverter behavior when connected to the local grid.
• AS IEC 62477.1:2024: The Australian adoption of the international standard for power electronic converter systems, ensuring safe design and operation of power electronics.
• AS IEC 62040:2019: This standard covers uninterruptible power supply (UPS) systems, relevant to storage systems that provide backup power functionality.

South Africa

• NRS 097-2-1:2017 Edition 2.1: This national standard governs the installation and operation of embedded generation systems, including battery storage, connected to South Africa’s electricity network.

Thailand

• PEA:2016: This standard, established by the Provincial Electricity Authority of Thailand, defines the grid connection requirements for distributed generators to ensure the stability and safety of the provincial power network.
• MEA:2015: This regulation outlines mandatory safety protocols, voltage regulation limits, and anti-islanding requirements to maintain the reliability of the urban electrical infrastructure.

WHES: Certified and Ready for Global Deployment

WHES designs every C&I energy storage system to meet major nternational safety standards, including the ones listed in this article. Each product is independently tested and verified against the world’s most rigorous requirements.

PC-G1, WHES’s all-in-one energy storage solution, holds UL 9540A certification, the industry benchmark for thermal runaway containment and propagation testing. During thermal runaway testing, the unit experienced zero fire or explosions, which demonstrates exceptional thermal containment and safety isolation.

PC-G2 has achieved VDE 4110 certification from TÜV SÜD, one of the most technically demanding standards for medium-voltage grid connection of generating units. It supports Fast Frequency Response (FFR), achieving reactive power and frequency response within 100ms, with Total Harmonic Distortion (THD) below 3% — the kind of grid stability that VDE 4110 demands.

PC-G2 has also earned IEC 62933-5-2 certification from SGS, a globally recognized testing and certification authority. This standard is among the most stringent for grid-connected energy storage systems, validating PC-G2’s safety performance, operational reliability, and readiness for grid integration. Together, these certifications reflect WHES’s commitment to delivering C&I energy storage solutions that are not only high-performing, but trusted and verified for deployment in the world.

Conclusion

Safety certifications are the clearest signal a manufacturer can send about the quality of their energy storage system. For C&I buyers, reviewing these certifications should be a non-negotiable part of any evaluation process.

WHES has earned all of these certifications, giving buyers the assurance that their investment is backed by verified safety and performance. In an industry where the stakes are high, that assurance makes all the difference.