If Dax reappears maybe he'll clarifiy the type of 40-50 amp hr cells he's using. I do agree that the prismatic batteries we're thinking about ( Winston, CALB, GBS and others do not use pouch cells, A123 type ), as apparent in the pictures. I thought it was time to show what they look like since someone posted they looked inside one and what was posted was totally wrong and BS.
LiFePO4 - The future for off-grid battery banks?
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Originally posted by karrakThinks obviously haven't changed since this post that I made http://www.solarpaneltalk.com/showth...142#post162142 over three months ago. I still stand by those comments.
I am not offended, the comments were not aimed at me. In my opinion it would have been more productive if you and Solar Pete had been more balanced with your treatment of all the antagonists.
You won't find out any new information if people are treated like dax was.
For the record I have no business dealings and never have had with dax, I don't even know who dax is or what companies he is involved with.
Simon
My misunderstanding of your relationship (or not one) with dax. It was hard to tell considering were you backing him up so strongly.
Also while you may feel that I am not "balanced" in my treatment to all antagonists, I feel I have done a pretty good job.
Also referring back to that thread you mentioned. I still stand by the decision to enforce the rule of not allowing bad information or poor suggestions concerning solar technology to be posted on this forum. People are too easily convinced of what will work just watching youtube videos. Allowing similar details with lack of backup data to be posted on this forum and not call that out would be misleading and possibly dangerous to others.
If dax and his company have developed a better battery then I would say congratulations. But words are cheap and IMO proof comes from real life data. Since I do not have this data concerning dax's battery I can't fully support it and will continue to be cautious about allowing people that I do not know to make claims without providing at least some specific data to back up their claims.Comment
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"Large format lithium battery"
Just thought some may find this interesting.
"Large format lithium battery" - is that the same as large cells ? It is the only 'consumer', plug and play, LFP battery bank I've run into. It is packaged nicely - and as SK will tell you, that is all that matters
I little levity goes a long way. PNjunction is always knowledge seeking and courteous. When skeptical, he asks for facts without being condescending. If I knew anything about anything, I'd follow his lead .
Ignorantly, I made the mistake of buying a 155ah AGM SLA for my first 'real' toy project. Personally, I'm ready to kick lead acid to the curb. It has turned my 'solar fun' project into 'am I killing my battery' project. That 5000 year old tech is dead to me.
For solar to 'really' take off, a consumer friendly, modern energy storage technology needs to rise to the challenge. At this moment, I'm putting my money on LFP. So keep their feet to the fire PNjunctionComment
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If you consider just plates, the geometry of a stack of positive and negative plates with separators makes it hard to identify whether each plate forms one "cell" with one of the two plates next to it or one cell which shares the plates on either side with one cell.
In a typical FLA battery cell (2V nominal) there will be many positive and negative plates joined by lead bus bars at the tops but we do not consider this to be many cells in parallel.
There is a distinction of sorts that can be made between the prismatic cell with layered plates, the prismatic cell with wraparounds of the plates at the edges in a zig-zag configuration and the cylindrical cell with only two electrode sheets interleaved and wound continuously from center to outside. But I would call each of those a single cell.SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
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Still, this is what I'm talking about. And to be fair to Dax, here goes:
We don't know what the cells actually are, nor do we know what the "mppt technology" controller really is, nor do we know what sort of dc/ac inverter they are using. All of it is sight-unseen except for some pretty portable cases. I want to know what's inside before buying.
In addition, pics of some of the panels just simply ground mounted with clumps of grass across the bottom throwing shadows shows that they (or maybe just the photographers) don't know that you need to keep shadows off mono/polycrystalline panels. They really should have cleaned up in front of some of those shots. Unwary users will just plunk them down on the lawn like in the photos, and then wonder why nothing seems to charge well.
Uh, yeeeaaah, one could do much better by constructing a kit of their own.
Ignorantly, I made the mistake of buying a 155ah AGM SLA for my first 'real' toy project. Personally, I'm ready to kick lead acid to the curb. It has turned my 'solar fun' project into 'am I killing my battery' project. That 5000 year old tech is dead to me.
For solar to 'really' take off, a consumer friendly, modern energy storage technology needs to rise to the challenge. At this moment, I'm putting my money on LFP. So keep their feet to the fire PNjunctionComment
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It's the link given by youtube when you share the video at a certain spot rather than copying the url. You save a whole character or something.
I'm not even entertaining buying it. The details are quite opaque.
The "large format" is what caught my attention in regard to this thread.
Probably so but as a learner project, I'd just assume start with LFP. I've learned :P Ha, we'll see, thanks again for your insights. PaulComment
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Still, this is what I'm talking about. And to be fair to Dax, here goes:
We don't know what the cells actually are, nor do we know what the "mppt technology" controller really is, nor do we know what sort of dc/ac inverter they are using. All of it is sight-unseen except for some pretty portable cases. I want to know what's inside before buying.
In addition, pics of some of the panels just simply ground mounted with clumps of grass across the bottom throwing shadows shows that they (or maybe just the photographers) don't know that you need to keep shadows off mono/polycrystalline panels. They really should have cleaned up in front of some of those shots. Unwary users will just plunk them down on the lawn like in the photos, and then wonder why nothing seems to charge well.
Uh, yeeeaaah, one could do much better by constructing a kit of their own.
SimonOff-Grid LFP(LiFePO4) system since April 2013Comment
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I don't know what that video has to do with dax, if you go to the company website mentioned in the video you will find they are based in the US. They must be doing something right if their customers include NASA, all branches of the US military, Lockheed Martin etc.
SimonComment
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I don't know what that video has to do with dax, if you go to the company website mentioned in the video you will find they are based in the US. They must be doing something right if their customers include NASA, all branches of the US military, Lockheed Martin etc.
SimonComment
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I understand from a business standpoint that one wants to have the flexibility of changing your supplier without having to deliver those details to the customer. For instance, some powersports LFP battery suppliers used A123, and people thought they were buying those internally based on previous sales. But lo and behold, a year or two later when they built up a name, they are no longer using A123, but something else, and you have to cut one open to find out who the replacement is. For some, that brand-switch is unacceptable when it is not mentioned in detail any longer.
The extreme analogy here is buying what was supposed to be a Rolls-Surrette, but a few years later, the Costco battery shows up at your door instead. Since we are discussing a *proposed* retail business and not the current private contractor biz, analogies are all we have to go by.Comment
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CALB LFP cells
I asked them what type of LFP - "CALB LFP cells". Hard to tell how reputable they are but to my eyes it looks like a well built, well thought out product. Still, trick or treat, who knows.Comment
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Who is buried in Grant's Tomb?MSEE, PEComment
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Huh? When I taught urchins in a community college, I liked pointing out the morons so they would leave and quit wasting my and other students time and money with one simple question they cannot answer correctly. their eyes just glaze over and roll into the back of their heads. Only to find out later after being laughed at for being stupid.
Who is buried in Grant's Tomb?
Wut? I'm going with Hoffa.Comment
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The blue cells, while ok for our purposes, are getting long in the tooth if they are using those.Comment
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