robbob2112
Doing more research, mosty harmless
Sorry, I was replying to @MisterSandals, I could see that you were using new stuff since you got into your cabinet.
He is sitting on cement board.
House burned down
- Thread starter Jejochen
- Start date
He is sitting on cement board.
At least the OP got out safe.
Makes me worried about my system: 4 chins 12v LFP's wired in series with a single fuse between them and the inverter. Sitting on concrete, but with only 7' above to the TJI joists/subfloor.
If my chins decided to leak I wouldn't know it as they are in a case.
Makes me worried about my system: 4 chins 12v LFP's wired in series with a single fuse between them and the inverter. Sitting on concrete, but with only 7' above to the TJI joists/subfloor.
If my chins decided to leak I wouldn't know it as they are in a case.
The fuse holders as on the pictures are certified and "fire retardant" if thats correctly written.
What the exact cause of fire was i guess well never know. The fire expert pinpointed that fuse as the source of the fire. His knowledge about fires, temperatures, etc was amazing.
Fuses might provide the spark/arc upon an over current situation but something combustible nearby has to burn. So point of ignition possibly but does not explain much.
Ampster
Renewable Energy Hobbyist
Here is the first post where the OP mentioned to problem. I think somewhere in another thread he may have also posted in a thread where a battery was the cause of a fire. I don't think we know what caused the fuse to melt.
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Cronix
New Member
These are the types of events that keep me up at night. One thing that gives me a bit of peace of mind is having an automatic CO2 fire suppression system in the building where our batteries/inverters are. I don't want to just know there's an issue, I want the issue stopped ASAP to prevent further damage. CO2 also won't damage anything in an electrical fire like H2O would. It just removes the oxygen.
hwy17
Anti-Solar Enthusiast
Didn't you ever hear not to leave batteries on a concrete floor? It'll suck the charge out!
hwy17
Anti-Solar Enthusiast
That's a pretty cool idea and more economically achievable than I thought. I have a vent to the outdoors so I could add one of these to blow into the case if the smoke alarm went off. PSSSHHHHHHHHHH.
But then I think I'd still have an ongoing venting event after it was done. They're a prolonged kind of problem.
Tulex
Solar Wizard
Some people still believe that. Reality is that it's not true anymore.
I believed that until this thread
I put my car's battery on top of a box in my garage to keep it off the floor because I had heard this tale and had no idea if there was any truth to it or not. It made no sense to me but I erred on the side of caution anyway (I've gone through too many batteries for this car from stupid mistakes killing them lol)
ricardocello
Watching and Learning
The Concrete Truth About Batteries Stored on Concrete
Have you heard the one about batteries discharging when stored on concrete? Apparently, some people have taken to storing 12V batteries—the kind used in electric wheel chairs and emergency lighting systems—on wooden shelves to maximize their life expectancy. Is there a spark of truth to this or...
www.mcgill.ca
“A hundred years ago, this rule-of-thumb was quite useful, as the case around the battery was made of wood and the electrical cells were glass. If the concrete floor underneath was wet, the wooden case would swell, causing the glass cells to break.”
Brucey
Solar Wizard
Personally I use midnite DC breakers but the t class takes less room. For the blue boy brigade the class t lynx power ins are the "seamless" option.
hwy17
Anti-Solar Enthusiast
The picture in that article hurts me lol. Those are nice batteries too.The Concrete Truth About Batteries Stored on Concrete
Have you heard the one about batteries discharging when stored on concrete? Apparently, some people have taken to storing 12V batteries—the kind used in electric wheel chairs and emergency lighting systems—on wooden shelves to maximize their life expectancy. Is there a spark of truth to this or...www.mcgill.ca
Sparks-n-Splinters
New Member
Sparks-n-Splinters
New Member
To this day I can't leave a battery on concrete without hearing my Dad's voice booming in my head!
"DON'T LEAVE THAT BATTERY ON THE CONCRETE FLOOR!!!"
Ampster
Renewable Energy Hobbyist
Just remember that NMC chemistry creates oxygen during thermal runaway so CO2 or any form of fire suppression that relies on depriving the fire of oxygen will not be effective for that part of a fire if you are planning on using that type of Lithium Ion chemistry. The safer chemistry is LFP and most of the DIY packs described on this forum is the most used chemistry. CO2 or other fire suppression methods would have worked in the OP's case to put out the fire that apparently started in the wiring.
robbob2112
Doing more research, mosty harmless
Don't get to excited about a CO2 extinguisher in the case of LFP batteries. You actually need a Class C extinguisher, for electrical fires. A CO2 extinguisher would need to be in an enclosed space and enough volume to actually cool the equipment without condensing conductive moisture all over the place. The condensate itself isn't the problem so much as what dust and other particles are on the surface. And then you have corrosion issues after cleanup. Actually you will have these issues after cleanup no matter what.
If you want to depend on a CO2 extinguisher its trigger should also do a rapid shutdown of all the power sources or it will re-flash as soon as the door is opened.
And in general CO2 extinguisher are forbidden anyplace people are working in a confined space because it will smother them too. There is a reason shipboard firefighting depends on water and/or foam - confined spaces the fire burns the O2 and kills the crew. Releasing CO2 in a confined space would do it faster.
