@Bob B ,
No absolutely not trying to pick a fight with everyone.
People who parrot to tend to P. me off..
When I get called iron plate in my mind... I'm not picking a fight, responding to accusation.
I guess I got drawn in that by
@Luthj ....
It's fine to have difference of opinion about using stained steel or not.
Pointing it to "the source" of the fire, without any further knowledge...
And that suddenly seems to be the standard?? Without any proof that it would increase to the dangerous levels that it was claimed...
I guess I got dragged into that by
@Supervstech also...
Obviously, I disagree and challenge him to provide proof for his statements.
My multimeter tells he is wrong.
But that can be misinformation also
Reason for the fire:
(Choose one or all below)
- cascade of smaller errors in 18 months tinkering
- failure of BMS (3 times)
(No after 3 days wasn't my fault, all units got returned. Yes, 250A Daly can stop after 3 months successful working,
And new 150A Daly smart BMS can not be functional from the start)
- Bad batch of Eve cells (152A)
- too long screws pushing on the bottom, not the bus-bar.
(Adding additional washer fixed this, and no visual damage, no strange electrolyte smell, so
not perforated. Still... Something I think should not have happened if the seller would have provided studs
- Thailand!
Heat, moisture, dust, so much dust, rotents, amphibians and insects.
(While insects usually don't make direct (short) damage, their presence does)
- Learning curve.
Many things I can't call an error or accident, but they do add up. Like relocation 4 time, and re-wire of BMS after failure...
Releasing the compression, weak threads, replace BMS wires, clamping again..
till many threads failed.
- not using torque meter at start, and not having the knowledge available how many it should be (3.5-4Nm)
- not using grubscrew, and Loctite, using Loctite without primer
- not compress the cells.
February/March 2020 was "all about" keeping the cells cool and how they best should have space between them...
True for CalB, not Eve....
- use materials available.
That includes uneven length of grubscrew. Why? Because there isn't even size available and post order takes 2-4 months (start Corona time)
I guess that's the whole list
Choose what suits you best.
In my opinion, being there, living it, doing it.
Combination of all above.
Not one BMS wire, or rotent.
Perhaps it was damaged and did short.
The type of wire should have made it a small "dent" in the abuse a cell can handle.
With the 18 months past, the drop that made the bucket overflow.
I never thought the cells weren't safe anymore to use.
The cells that got hot in the previous fire, got replaced.
That was smoldering wood on top of the cells (6 got replaced)
Living off grid is also no fire department to safe our ass..
As I don't have a death wish for me or family.
You can be sure that I did not take any more risks then any responsible father would take for his family.