Brett V
Mad Scientist
Was surfing YouTube and came across this video. It’s a good example of so many things to NOT do.
Wow! I Guess Anything Goes On YouTube
- Thread starter Brett V
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Yeow… someone has a few bucks for sure…
so that's a roughly 100kwh capacity system? 100 bucks a battery times 128 batteries, and all the time wiring.
I'm slightly new so I'm not versed on all the "what not to do's" in this video, but it just kind of makes me happy I went with a pre-manufactured solution from my two LG4 indoor units.
I'm slightly new so I'm not versed on all the "what not to do's" in this video, but it just kind of makes me happy I went with a pre-manufactured solution from my two LG4 indoor units.
DIYrich
Solar Wizard
Little margin in weight limit for shelf. 440 lbs, with the batteries alone weighing 385 lbs.
24v for that many amps? Why not 48v?
Stacking major connections on busbar.
300 amp busbar for 1,120 ah of batteries?
Anl fuse, not class t.
IMHO, should have non-conductive protection for lower shelf batteries incase upper shelf breaks.
No non-conductive sheet between batteries.
24v for that many amps? Why not 48v?
Stacking major connections on busbar.
300 amp busbar for 1,120 ah of batteries?
Anl fuse, not class t.
IMHO, should have non-conductive protection for lower shelf batteries incase upper shelf breaks.
No non-conductive sheet between batteries.
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
I watched the Video, everything there is really well done and I see no issues of any sort. This is inside in a temperature controlled environment so that eliminates several possible issues. The cells are bound enough to prevent any stress on terminals from the small amount of expansion & contraction. For a Static Bank with good cells this is fine.
- FR4 sheets not being used is a personal choice, I would have used them anyways.
- That shelf can hold it all and being reinforced with board is good BUT Particle Board not so much, I would have used a good Plywood instead.
PST: Nothing wrong with 24V ! I'm 24V and by end of month will have 1680AH Online & Hot, capable of delivering 1200A and I run my house off that with room to spare.
- FR4 sheets not being used is a personal choice, I would have used them anyways.
- That shelf can hold it all and being reinforced with board is good BUT Particle Board not so much, I would have used a good Plywood instead.
PST: Nothing wrong with 24V ! I'm 24V and by end of month will have 1680AH Online & Hot, capable of delivering 1200A and I run my house off that with room to spare.
timselectric
If I can do it, you can do it.
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It looks great to me.
I see no issue whatsoever.
Edit: the two shelves aren't perfectly lined up with each other in the middle.
It's garbage, start over and get it right.
I see no issue whatsoever.
Edit: the two shelves aren't perfectly lined up with each other in the middle.
It's garbage, start over and get it right.
Q-Dog
¯\_(ツ)_/¯
I wish I had the room for this setup. I like it.
Brett V
Mad Scientist
I don’t have a problem with the cells not being compressed but cell separator sheets should be in there. Particle board shelves for that much weight? He left the BMS hanging by one wire, and I wouldn’t zip tie the balance leads across the bus bars that way. No class-t fuses.
After the long thread concerning a house fire, I wanted to stir up some conversation. I see some of the same things that are being mentioned in that discussion being done here
After the long thread concerning a house fire, I wanted to stir up some conversation. I see some of the same things that are being mentioned in that discussion being done here
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Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
One thing that caught my eye. He used LED Strip lights which have colour capabilities. Wouldn't it be cool if there was a way that a BMS could send a signal that changed the LED colour if there was an error or fault of some sort. White for good, yellow for warning & red for "Oh Shit something is BAD" pay attention NOW...
The Particle Board shelves are ON TOP of the supplied wire shelves. The shelves also have a center cross brace, (only shown for a second).
FR4 sheets are Not Mandatory, they are to isolate the cells from contact (think friction, not a problem on ESS) and/or if the "blue-wrap" is damaged in anyway. Not a Big Deal.
Being 24V, that allows for more Fuse Choices, even MRBF if desired.
timselectric
If I can do it, you can do it.
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No need for separator sheets, if you don't compress.
I'm not 100% sure but it looked like he supported the other end of the BMS with something. (Maybe a tie wrap)
I'm not sure what the chosen shelving material was rated for. But it doesn't look like it's bowing. The weight is evenly distributed.
At 24v an ANL fuse doesn't concern me.
But everyone is entitled to their own opinions. Safety is usually my only concern, for other people's projects.
I'm not 100% sure but it looked like he supported the other end of the BMS with something. (Maybe a tie wrap)
I'm not sure what the chosen shelving material was rated for. But it doesn't look like it's bowing. The weight is evenly distributed.
At 24v an ANL fuse doesn't concern me.
But everyone is entitled to their own opinions. Safety is usually my only concern, for other people's projects.
Q-Dog
¯\_(ツ)_/¯
I noticed he put a small LED on the corner of one pack, and noticed it again on another pack during a wide shot. I would much prefer a 1 paragraph explanation of the components instead of a stylized video that explains nothing.
Think that’s the BMS power button
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