Co-located solar and battery storage site fire requiring multi-day response

In 2024, a fire at a co-located solar and battery energy storage site in North America required an emergency response lasting several days. Public records indicate that several hundred nearby businesses and a number of schools were evacuated as a precaution, and that the fire service sustained a large water deployment across the response period. The incident is documented in public municipal and fire service records. The co-located nature of the site, with solar generation alongside substantial battery storage, created compound response challenges for emergency services. Public records available to this register do not establish the final outcome beyond the conclusion of the multi-day response.

Sources do not currently establish a single confirmed root cause, and this entry is therefore confined to the response and impact rather than the cause. As general context, co-located generation and storage sites combine the failure modes of more than one asset class: electrical fault risk on the solar side, thermal event risk on the battery side, and the interactions between them, including direct current bus interconnection, shared inverter infrastructure and shared site emergency systems.

Lessons drawn from the publicly recorded response activity:

1. emergency response plans for co-located sites should explicitly address compound failure modes and the interaction between solar and battery systems during an incident, including isolation procedures that account for both technologies;
2. evacuation thresholds for sites close to commercial and educational premises should be agreed with local emergency management before an incident, recognising that smoke from lithium-ion thermal events presents different toxicological concerns from conventional industrial fires;
3. water resource availability for an extended response, running to sustained high volumes over several days, should be confirmed during planning rather than assumed at the time of the incident;
4. fire risk assessment for generation and storage sited near populated areas should consider a worst case multi-day response, not peak severity of a single short event alone;
5. site documentation given to responding crews should identify which parts of the site remain energised by solar generation during daylight once the battery system has been isolated.