Salt batteries – the only chemistry UL9540A certified for safety

More and more people are recognising that one of the major issues with energy storage batteries are the dangers with fires and explosions particularly associated with thermal runaway (self-sustaining fires). This has become particularly relevant as people are considering installing the many lithium ion battery technologies in their houses or businesses and are becoming aware of the possibility of the dangers associated with this.

Standards Australia has been working on new installation standards “AS-NZ 5139_2019” which will try and address this issue but there is still a lot of discussion around whether the new installation restrictions are too strict or are really looking at individual battery characteristics correctly and fairly.

International Standard “UL9540A” has been developed to independently examine Fire Risk with Battery Cells and Evaluate Thermal Runaway Fire Propagation in Battery Energy Storage Systems.

Salt batteries – the only chemistry UL9540A certified for fire safety

The “UL9540A” test was developed by a third-party safety science organization UL, as a new test method for use in international fire protection regulations (2018 IFC: International Fire Code) and the National Fire Protection Association’s NFPA 855 technical standard related to installation of energy storage systems.

The test Method is for Evaluating Thermal Runaway Fire Propagation in Battery Energy Storage Systems

The “UL9540A” cell test reproduces thermal runaway conditions, measures the characteristics required to evaluate the following fire risks, and compiles the results into a report:
• Cell surface temperature when a safety valve has ruptured and when thermal runaway starts
• Gaseous components and other matter emitted from a cell during combustion

SoNick batteries are now the only batteries that have successfully passed the UL9540A certification which is to test for thermal runaway using five different methodologies; overcharge, external short circuit, nail penetration through casing and separator and overheating to 800oC,

This report verified that the SoNick battery did not ignite even when heat was forcibly applied from the outside meaning that the chemistry is intrinsically safe.

The results of these independent tests have confirmed what we already knew that the SoNick battery is one of the only batteries on the market today that has no possibility of catching fire or going into thermal runaway which should definitely be comforting when attaching a SoNick battery to your home or business.

If you would like to know more about getting safe, reliable, recyclable, Sodium Nickel Chloride (molten salt) battery storage for your own home, business or micro-grid application visit us at

 We have a number of different sized systems that can cater to your budget and household needs.

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