diy solar

diy solar

House burned down

kolek said:
@Luk88 I can't seem to find that anywhere for sale for anything close to $275. Do you have a link?
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I bought it from a local reseller here in Poland so the link is not going to be useful. I just checked again and same guy now is trying to sell it at almost double the price. There is something weird going on with the pricing of these. I see them online for as much as $1500, the usual price in the US seems to be around $600+ (it's definitely not worth it). The cheapest I can find it now is $370 Again in Poland - https://allegro.pl/oferta/kamera-ip-dahua-tpc-df1241-15294596773 Perhaps I was just lucky to get it at a good moment. I realise it's not very useful outside Europe.

I'd never pay $600+ for that camera. It is far worse in terms of image quality than for example this https://www.amazon.pl/gp/aw/d/B0CN2ZHKQ4/ref=ya_aw_od_pi?ie=UTF8&psc=1 add on imager. That one is not cheap. I bought it for $370, but it has really nice image quality. You can see deer (or a person) from 450m away at pitch black. It would be a shame to waste such a nice thermal imager for watching a battery 24/7, but getting it, or similar and plugging it into something like a raspberry pi is probably the only "budget" option at the moment.
 
Supervstech said:
Oh, so you should have BMS data for all 112 cells, no?
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Yes, with all data you possible want like cell temp, etc...
Advantage is the bms gets voltage of all 112 cells the same, not only the 16 its responsible for. Anyway, each system has its pros and cons. I guess with todays bms'es that are linked together its the same result.
 
I think the question is, if you have cell data for all 112 cells (such as voltage), do any of the cells show a sudden drop or change that night?
 
BMS log (if it survived) would show the failure if cell related.
 
Jejochen said:
Yes, with all data you possible want like cell temp, etc...
Advantage is the bms gets voltage of all 112 cells the same, not only the 16 its responsible for. Anyway, each system has its pros and cons. I guess with todays bms'es that are linked together its the same result.
Click to expand...
Are you going with Batrium again? It seems more designed that perhaps you have a 16 cell config, and you decide to add another 4 cells, watchmon is perfect for that. However for your design with multiple strings you may want to contact them, I'm sure they would recommend a watchmon and shunt/contactor per string, given that you have fuses (class T in the future) between the strings.

Hope you get out of hospital soon.
 
Supervstech said:
Oh, so you should have BMS data for all 112 cells, no?
Click to expand...
Here all 64 of my cells. The data also shows SOC, current charge rate in amps and watts, cell temp, the max and min voltage of all 64 cells. Battery bank voltage, balance rate and min/max balance cell V. You can change various data shown, I've changed some of the data displayed on the screen. I have this on a laptop in the kitchen on 24/7 and also ported using a HDMI to the TV in the kitchen if I want.

One can also create a snapshot of data in print form. The Batrium will also create a critical fault log, it took me some time to figure out how to do it.

The Batrium also has web integration with latest versions of software where data can be stored and accessed on a server. OP may or may not have this enabled. I don't as there is also wi fi access on my local network using the tablet app used for web integration. If web integration was enabled, he might be able to source the data stored on the server. I don't need the web access, I use SA for when I'm away from my network.


Batrium screen capture.jpg
 
Hedges said:
But maybe the inspector is doing OP a favor by pointing at a commercial (UL listed?) part as the cause. He can say that with a straight face, regardless of the environment provided.
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you know Hedges, that is one of the best theories to date on why the Fire Inspector would call out the fuse.... Never occurred to me that the Fire Inspector might be a good Dude.
 
Respect to the OP for putting this thread up for everyone’s benefit, I’m always impressed when people risk being questioned/ criticised for the greater good of us all maybe becoming a little safer by understanding why things can go wrong.

Lots of discussion of fuses on this thread but I didn’t see any ask about the cell compression used. The OP has said the system was put together a few years ago when cell compression was just becoming a thing and separators were not being discussed. So I’m wondering how much compression was applied and could it have been too much and contributed to the previously leaking cell and maybe even an internal short developing in another cell later, leading to this event?
 
upnorthandpersonal said:
He did have compression. The typical threaded rods and end plates.
Click to expand...

Yes I know he had compression, I’m suggesting the amount of compression might be an important factor. Perhaps if the cells were over compressed, the cracking and leaking of one cell early on and the possible internal short circuit and fire later might be a result of this.
 
_voltmeter_ said:
HPL is reated to 100°C as far i have seen, maybe your shelf was not stable enough?
there is a lot of weight on this
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Yeah this doesn't seem like suitable material for battery shelves. Look at how the material has basically disappeared in the fire. One wonders how things would have faired with his original steel shelving unit prior to his expansion. Other shelves and strings collapsing/pancaking down to strings below wouldn't have helped.

Screenshot_20240430_184243_Chrome.jpg



Screenshot_20240503_062637_Chrome.jpg
 
Brucey said:
I did find this regarding flammability:


Seems to indicate certain versions won't sag under fire up to 400 degrees but I don't think they tested with hundred of pounds of batteries on top as a shelving unit, moreso for floors, walls and ceilings.

View attachment 213032
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Guys, please, yall looking at things way too far. The shelves were fine, the fire fighters have torn everything apart to drag all the cells outside. I dont even know what is being discussed here.
 
Jejochen said:
Guys, please, yall looking at things way too far. The shelves were fine, the fire fighters have torn everything apart to drag all the cells outside. I dont even know what is being discussed here.
Click to expand...
What is being discussed is how to not have this happen to us. There are many variables in adding batteries to a system. We all just want to eliminate the variables that could lead to what happened to you.
 
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