How to read these cases
Sources checked through September 30, 2026; 2026 is not a complete reporting year. These selected cases do not establish a rising industry fire rate or prove that MEU would prevent similar incidents. Building and burned areas are distinguished. Undisclosed values are not zero, and capacity is not inferred from area.
March 12, 2025 · Xianghe, China: construction hot-work fire
The furniture factory had approximately 2,300 m² of total building area. During rooftop PV construction, unauthorized welding ignited roof insulation, causing three deaths and CNY 4.1932 million in direct economic losses. Design capacity was not disclosed; panels had not yet been installed. This is a construction hot-work case, not an operating PV module failure.
May 25, 2025 · Minhang, Shanghai: DC cable fault
A factory rooftop PV fire on Yuanming Road involved damaged DC cable insulation, contact with the metal roof and electrical arcing, according to the fire service case summary. Approximately 10 m² burned, with no casualties. Total building area, PV capacity and monetary losses were not disclosed.
June 18, 2025 · Ablis, France: rooftop electrical cabinet fire
The logistics warehouse covered 80,000 m²; the affected compartment covered 6,000 m². Neither figure is the burned area. A fire near a PV electrical cabinet, reportedly linked to overheating, spread through parapet vapor-barrier material and was quickly controlled. One worker suffered a hand burn; 87 employees stopped work that afternoon, without a cold-chain interruption. PV capacity and monetary losses were not disclosed.
April 20, 2026 · Dabu, Guangdong: PV wiring fault
A factory rooftop PV fire was attributed to an electrical wiring fault in the fire service case summary. Approximately 6 m² burned, with no casualties. Total building area, PV capacity and monetary losses were not disclosed.
June 17, 2026 · Los Angeles, USA: cold-storage roof fire, cause undetermined
The facility covered approximately 500,000 ft², or 46,452 m². The fire investigation reported in September classified the cause as undetermined, with the origin near rooftop panels; PV causation is not established. Original capacity records have not been cross-verified against the incident facility, so no confirmed capacity is listed. The operator disclosed over USD 100 million invested in cleanup. This is company-reported cleanup expenditure, not an official total-loss assessment.
August 11, 2026 · Changsha, China: inverter fault
A rooftop PV inverter fault at a Longpingyuan warehouse ignited nearby cables. The fire service summary noted electrical leakage and falling-object hazards; four vehicles and 21 responders attended, with no casualties. Warehouse area, PV capacity and monetary losses were not disclosed.
Engineering lessons: location and materials influence consequences
A research review published by the UK Building Safety Regulator identifies panel-to-roof gaps, roof materials and array layout as factors in heat retention and fire spread. DC electrical hazards may remain after grid disconnection. This supports evaluating layout and response conditions; it is not MEU certification or product performance evidence.
MEU comparison boundaries: separation, location and response
Engineering analysis based on the current product description: a ground-supported canopy can help limit exposure of production areas when designed separation distances, clear access and separation from adjoining structures are maintained. Canopy IDs, device mapping and mobile alerts can support fault location and response; local isolation requires electrical design. Rooftop PV can also use monitoring. Vehicles, charging and optional storage need separate assessment. A single 6.55 kWp canopy is not a like-for-like fire-risk or loss comparison with a large power plant.
Fast response requires end-to-end validation
Generation monitoring is not fire detection, and a delivered alert does not mean responders are on site. Project acceptance should record fault onset, detection, notification delivery, acknowledgement and safe isolation or on-site response, accounting for equipment, connectivity and staffing. No second-level detection, automatic suppression, fixed response time or risk-reduction percentage is promised without testing.