Photovoltaic Battery Storage - Market Check Fire Hazard

Whether these fears are irrational will become clear in the next few years, because these storage units are only now being installed in significant quantities.

It doesn't even have to be a series defect; any battery can "catch one" during production and eventually catch fire.

Dismissing this as nonsense would be like denying that people die annually in Germany from defective gas boilers and CO poisoning.
However, you can install a CO alarm against that... a burning 20kWh battery requires a fire suppression system...

I've already seen inverters where DC link capacitors have "burst" or exploded. No battery storage unit will come into my house. I'd rather put a Power2Gas storage in the HAR.

PS:
Electric cars have actually caught fire, by the way. An Audi e-tron set an entire residential house on fire a few months ago. Just Google it; there are already several cases of fires while charging, just with the Audi e-tron...

For me personally, storage only makes sense when the electricity price rises significantly (I'm still at 27.5 cents), with emergency power operation, as an external storage (or at least in the cold roof (I have no more space in the utility room)) or with bidirectional charging in the BEV. Or of course if it simply becomes much cheaper (100 EUR/kWh?).

A battery storage in the uninsulated attic, where it can be below freezing in winter and over +60°C in mid-summer? Ideally with a decommissioned Tesla battery. Then you can set the fire yourself, saving the purchase of the battery.

So how does that work in the car?

So how does that work in a car?

In most electric cars, you have conventional Li-Ion batteries, meaning with nickel cathodes. Tesla prefers these for cars sold in "colder" regions.

For stationary storage, on the other hand, you almost exclusively have lithium iron phosphate batteries (except for Senec). These weigh more and are somewhat more expensive. The cathode here is made of phosphate. Since they are almost always operated indoors, it is relatively warm.

The biggest disadvantage of lithium iron phosphate batteries is: They don’t like cold. When the temperature drops below 15° C, performance gradually decreases because the internal resistance rises as temperature falls.

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Also, when discharging at low current rates (up to 1C), the service life is significantly longer than that of cobalt Li-ion batteries, the latter being capable of higher currents.

What is the recommendation now? So regardless of whether a storage system is worth it or not. Should one rather get a lithium iron phosphate battery for the house?

What are some "good" lithium iron phosphate batteries?

For home use, lithium iron phosphate storage. Quite clear. However, it should definitely be placed in the heated enclosure and not exposed to temperature extremes like in the uninsulated attic.

The fire risk here is also very low. If it were to go thermal runaway, it would only swell slightly and warm up a bit. No comparison to cobalt Li-ion storages!