diy solar

diy solar

House burned down

robbob2112 said:
One thing it seems people are missing here is the batrium design - the BMS doesn't have any ability to shutdown or limit current other than the shutmon module.

In this case the shuntmon was installed after the different battery banks were brought together. Which seems to be exactly how batrium intended things to work. This means the only thing standing in the way of the different banks dumping into each other were the 7 fuses.

The image is for a 2 battery setup.

View attachment 213164


Wiring Diagram for MultiMon

Typical Wiring Diagram - MultiMon-MM8
wiki.batrium.com wiki.batrium.com
Click to expand...
You are correct, this is how Batrium is designed to work, a fuse on each parallel set of cells is the protection which any parallel battery setup should have. Take note, both batteries in that diagram has a fuse on the positive terminal.

The OP's failure was due to the fuse type. It was the correct system design, just the wrong fuse.

Attempting to put blame on the BMS is not correct. The BMS will do exactly what it is designed to do. No current passes thru the Batrium, mosfets can't fail because there aren't any. One can run huge inverter loads with a Batrium.

Instead of spending your energy blaming the BMS, you should instead spend the energy informing members there should be a Class T fuse between any parallel batteries.
 
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Zwy said:
You are correct, this is how Batrium is designed to work, a fuse on each parallel set of cells is the protection which any parallel battery setup should have. Take note, both batteries in that diagram has a fuse on the positive terminal.

The OP's failure was due to the fuse type. It was the correct system design, just the wrong fuse.

Attempting to put blame on the BMS is not correct. The BMS will do exactly what it is designed to do. No current passes thru the Batrium, mosfets can't fail because there aren't any. One can run huge inverter loads with a Batrium.

Instead of spending your energy blaming the BMS, you should instead spend the energy informing members there should be a Class T fuse between any parallel batteries.
Click to expand...

I wasn't blaming the BMS, just pointing out there was no individual BMS per battery like people expect.
 
Zwy said:
Attempting to put blame on the BMS is not correct. The BMS will do exactly what it is designed to do. No current passes thru the Batrium, mosfets can't fail because there aren't any. One can run huge inverter loads with a Batrium.
Click to expand...
unfortunately I think that the targeted discussion toward the BMS was a fault of mine. I do appreciate the additional insights but fear those pages of misunderstanding were caused by me. Sorry!
 
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Jejochen said:
Hi all,
I'm really not asking for anything, but someone asked, so here is a link of an action my friends set up:

steunactie.be

Steun veerle jochen en hun kids na brand | Steunactie.be

Veerle jochen en hun kids , verloren alles door een woning brand. Help mee zodat ze terug hun leven kunnen opbouwen
steunactie.be steunactie.be

I wanted to "report" this fire to you all as in my opinion it is the right thing to do as it maybe can help others prevent it, and i wont say its easy.
Im typing this literally from a hospital bed. Adrenalin makes you go trough the first days, but now i know theres a rebound.

I have not read it all, but i can certaincly say when a new system is installed, it will be with the "t" fuses. Wishes i knew about them years ago.

Be safe guys.
Click to expand...


Bump for the donate URL some asked for
 
G00SE said:
unfortunately I think that the targeted discussion toward the BMS was a fault of mine. I do appreciate the additional insights but fear those pages of misunderstanding were caused by me. Sorry!
Click to expand...
Thank you.
 
Hi again,
If i came out rude in one of my posts, my apoligies, it has been a rough time lately.
Indeed full metal shelves lined with hpl.
All cables were 70 mm2, length between bank and busbar aprox 1.2 m, all wires equal in length.

Thanks for the donations ❤️
 
Jejochen said:
Hi again,
If i came out rude in one of my posts, my apoligies, it has been a rough time lately.
Indeed full metal shelves lined with hpl.
All cables were 70 mm2, length between bank and busbar aprox 1.2 m, all wires equal in length.

Thanks for the donations ❤️
Click to expand...
You have every right to be tense. All these jack offs, including me, can go pound sand! :) Our banter doesnt mean much compared to the drama that you are involved in.
You are fine. No apology needed. Keep you head up brother.
 
hmmm... anythoughts on that bluesea disconnect switch? on amazon it says 32volt and 350 amp.
battery system being 48v hitting ~60v is almost double the rated voltage.
 
hotnoob said:
hmmm... anythoughts on that bluesea disconnect switch? on amazon it says 32volt and 350 amp.
battery system being 48v hitting ~60v is almost double the rated voltage.
Click to expand...


Unless you can read the numbers off the switch (I can't) it is hard to tell which one it is. They all look similar and there are versions that go up to 60v 600amps
 
robbob2112 said:
Unless you can read the numbers off the switch (I can't) it is hard to tell which one it is. They all look similar and there are versions that go up to 60v 600amps
Click to expand...
all of their disconnects are only rated for 32-48v, afaik, and the 600amp one is currently grey, where as the red ones are only up to 350amp.
 
Zwy said:
there should be a Class T fuse between any parallel batteries.
Click to expand...
no its not, instead use a heat resistant mega fuse holder
and a simple bms for each paralel battery.

no expensive useless batrium needed
people can learn from this case and dump their batrium or install additionally a jk bms each paralel bank
 
_voltmeter_ said:
people can learn from this case and dump their batrium or install additionally a jk bms each paralel bank
Click to expand...
What should I do with my 8 50Ah not DIY batteries that already have a BMS. Since they are only 50 Ah getting 8 Class T's set up would starve my children for a month.
 
ScrotusGobbleBottom said:
What should I do with my 8 50Ah not DIY batteries that already have a BMS. Since they are only 50 Ah getting 8 Class T's set up would starve my children for a month.
Click to expand...
Are these the dchouse/ecoworthy pizza boxes? You could put one class t on each paralleled pair (5kWh). That's how I'll be doing it (tho with midnite breakers versus class t).
 
_voltmeter_ said:
no its not, instead use a heat resistant mega fuse holder
and a simple bms for each paralel battery.

no expensive useless batrium needed
people can learn from this case and dump their batrium or install additionally a jk bms each paralel bank
Click to expand...

And you clearly have no clue what you are talking about. You also just as clearly haven't read the whole thread.
 
Brucey said:
Are these the dchouse/ecoworthy pizza boxes?
Click to expand...
No they are the *cough* Renogy batteries that Will destroyed on video.

I have 8 48v 50ah batteries cross wired, in groups of 2 . This gives my 4 wires to each bus bar instead of 8
Should I just get 4 Class T fuses? Why would that be better? I still would have 4 groups of 2 that could feed each other
 
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