>How could adding an EV system to that make it so much more likely to ignite, but so unlikely to ignite when it's just the EV? I have no idea, but just spit-ba

>How could adding an EV system to that make it so much more likely to ignite, but so unlikely to ignite when it's just the EV? I have no idea, but just spit-balling: - Heat from the engine causes premature embrittlement of the high voltage wiring harnesses insulation system, causing failures that lead to short circuits. Causing more fires. - Layers of grime/oil from the engine / oil-changes that gets on power electronic components. Electronic component fails in a way that lets the smoke out. In an EV, this just disables the vehicle. In a hybrid, the extra layer of oil catches on fire. - Power electronics components under the hood are subject to much higher operating temperatures, due to proximity to the engine, leading to earlier failures, of which some cause fires, due to the closeness of flammable liquids. - Fully battery electric vehicles are more pampered / maintained / see less severe operating conditions. BEVs more likely to be stored in a garage where they get charged, maybe fewer mice chewing through the high voltage cabling, etc.. - Hybrid batteries are stressed more, from the much more frequent full charge cycles. Batteries also see more heat from living in the engine bay(?). Hybrid batteries are included in more budget-minded vehicles, with lower price points, and so the batteries are sourced from less reliable tier two suppliers with less quality control? Adds up to more failures and more fires? - Are the more frequent hybrid fires equally distributed across manufactures? Or is Toyota on one end of the spectrum and say Stellantis on the other? - BEV-only companies have obsessed over weight in the quest for efficiency, which reduces wiring and parts count, which reduces failure points that can cause fires. Where hybrids and EVs from traditional ICE companies have a less optimal BoM, with more components reused from existing product lines, leading to additional complication in the design with more failure points. - Hybrid fires are predominately associated with crashes. The engine bay is crammed with more components, because of the dual power trains. Crash causes flammable liquids to escape, and a high voltage system failure ignites the flammable liquid. BEVs in a crash would have the ignition source, but no fuel. Gas-only has the leaked fuel, but no ignition source. Hybrids have both. - Hybrid vehicles are more popular with less affluent owners. Vehicle gets in a moderate accident, cousin Vinny gives it a once over to get things running again, possibly overlooking damage to the high voltage system that manifests as a fire later on.