Bit of left field question.

I have purchased a 48v 15kw battery system for my shed. It’s got 15x3.2v lifepo4 cells @ 320ah from memory with a bms and it’s all enclosed in a shell like a powerwall.
It will be connected to a Growatt 5kw hybrid inverter and 6kw of panels.

My concern is this battery catching on fire inside the shed.
I know the risk is small but I won’t have any insurance so I’m looking to put this battery system outside.

Looking for recommendations of how I need to do this.
It will be right next to the shed so I need something fire proof and obviously water proof.
Not too worried if the heat damaged a sheet or two but need to save the shed
The photo gives an idea of size.
My idea was to just do a cheap metal sheet box with fire bricks all around.

Thoughts??




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