I think there are heat detectors that can be used in conjunction with smoke (particulate) detectors. They may see the heat flare from the arcing to give you advanced notice, or set up automation to trigger your battery disconnects/shunts.
Maybe they can pony up for your insurance deductible, if they had worked properly you may have been able to save the house.
This is something I have wondered about for quite a while. They support Megafuses in all their gear and sell 48B versions of Megafuses, but they never really address the AIC question. Several months back I had the chance to talk to a Victron 'ambassador' about a system and he was recommending a Cass-T.... which I found 'interesting' given this is not documented by Victron. When I pressed him on it he said he always uses a T class when more than one LiFePo4 battery is in parallel. He also claimed the ABYC was going to change their recommendation to more along the lines of what he is doing, but I don't know if that has happened.
I'd add that Class T fuses are rated to open safely at these high AIC's without risk of causing other damage (exploding) or failing in such a way that they don't remain open. I can't readily find a reference but I've often heard it's possible for a fuse to fail in such a way that it doesn't open.
Better yet is a thermal imaging camera, such as a flir, or many other brands out there.
I am glad i have my thermal imaging attachment on my ipad.
Was just looking at one, might be my next solar related purchase
They indeed have a place. Most people can afford the non contact Thermometer as they are just a few dollars. Plus the readout is simple temperature.
That is required for initial setup but down the road maintenance you want something to give you a quick check.
I do a monthly PM check on my system, just as we do on customers sites. One of the checks I make is with a flir thermal camera. Anything getting warm shows up quickly.
This thread is an example of such a fuse failure.
Sorry for your loss.
