Are domestic battery energy storage systems safe?

Despite a limited number of known incidents with domestic battery energy storage systems (BESSs) in the public domain, questions have been raised regarding their safety due to the large energy content within these systems.

Why are battery energy storage systems important?

Battery energy storage systems (BESSs) use batteries, for example lithium-ion batteries, to store electricity at times when supply is higher than demand. They can then later release electricity when it is needed. BESSs are therefore important for “the replacement of fossil fuels with renewable energy”.

What is a battery energy storage system (BESS)?

Battery Energy Storage Systems (BESS) are pivotal technologies for sustainable and efficient energy solutions.

Are lithium-ion batteries safe for electric energy storage systems?

IEC has recently published IEC 63056 (see Table A 13) to cover specific lithium-ion battery risks for electric energy storage systems. It includes safety requirements for lithium-ion batteries used in these systems under the assumption that the battery has been tested according to BS EN 62619.

Are large battery energy storage systems a safety hazard?

The use of large battery energy storage systems (BESSs) in the domestic environment represents a safety hazard, even though few incidents are known in the public domain.

How are household energy systems assessed?

Household energy systems comprising solar photovoltaics arrays and battery energy storage systems are assessed using time-series consumption and generation data, determined by combining a validated demand model, marginal emissions factor calculations, storage system models, and assumptions regarding the future grid.