Off-grid lifestyle
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- Dec 21, 2021
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I have contacted more than 50 suppliers in china for what they call “grade A” lifepo4 cells but I am
More confused then ever, the discrepancy of information I have gathered made my PhD in economics journey looks so easy!!
When things don’t make sense to me, it means that either I am not well informed about the subject matter or the information itself is chaotic by nature.
I have received price quotes around 3,000$ for a 5kw battery pack with 10 years warranty from 3 reputable companies
Also received around 1,500$ Quote for the same battery with 5 years warranty from 2 other reputable companies.
I have received price quotes bellow 1,000$ from more than 20 other not-so-well-known suppliers with 10 years warranty.
I have received the similar price quote with 20 years warranty from few suppliers!
And the individual cells to form a 5 kw battery could cost anything between 500 to +1000$ with BMS, that is more than 20 suppliers.
In economics, prices should reflect all available information about the product. But that is only applicable in an efficient market where information are quickly transmitted among players.
If the prices I have seen are reflective of an efficient market, it means that there is at least 3 categories/quality of lifepo4 cells. The super VIP quality that last for +20years, the good quality that last for +10 years, and the not so good quality that I don’t know how long it will operate( recycled, defective ..) The warranty provided by the top reputable companies are mostly what I have made my analysis on as they have a lot to lose if things went bad. The warranty provided by the not-so-well-know companies are unreliable, not to go with the details…
On one hand, it does not make sense to pay +3000$ for a battery that last for +20 years knowing that 7 or 10 years from now technology might change for better, on the other hand it very risky to gamble with a 800$ on a battery that could Last less than lead acid. (Just to make a point here, Personally I am looking for a DIY +30 kw bank and +100kw banks for my brothers and friends )
But I am not a player in that market and that is why I am posting this thread.
In my opinion, the only way to clarify this obscurity is to have members that have bought cells or pre-assembled pack 2 or more years ago to share their experience. Information on price paid, warranty granted, reputation of the supplier, and more importantly how long the pack has been in operation without problems- how many cycles have the pack done and capacity lost, personal opinion about the pack quality, would clarify a lot of information for myself including forum members regarding the expected quality of lifepo4 batteries given a certain Price.
This post is trying to find answers from experienced members only on how many cycles we could expect from these cells.
If a cells is advertised for 3000 cycles on the manufacturer datasheet, and priced within the “good quality” category, would it make +1,500 cycles? Can we expect at least half?
What if it was priced within the “not so good quality” price range? Would it pass the 1,000 cycle mark?
More confused then ever, the discrepancy of information I have gathered made my PhD in economics journey looks so easy!!
When things don’t make sense to me, it means that either I am not well informed about the subject matter or the information itself is chaotic by nature.
I have received price quotes around 3,000$ for a 5kw battery pack with 10 years warranty from 3 reputable companies
Also received around 1,500$ Quote for the same battery with 5 years warranty from 2 other reputable companies.
I have received price quotes bellow 1,000$ from more than 20 other not-so-well-known suppliers with 10 years warranty.
I have received the similar price quote with 20 years warranty from few suppliers!
And the individual cells to form a 5 kw battery could cost anything between 500 to +1000$ with BMS, that is more than 20 suppliers.
In economics, prices should reflect all available information about the product. But that is only applicable in an efficient market where information are quickly transmitted among players.
If the prices I have seen are reflective of an efficient market, it means that there is at least 3 categories/quality of lifepo4 cells. The super VIP quality that last for +20years, the good quality that last for +10 years, and the not so good quality that I don’t know how long it will operate( recycled, defective ..) The warranty provided by the top reputable companies are mostly what I have made my analysis on as they have a lot to lose if things went bad. The warranty provided by the not-so-well-know companies are unreliable, not to go with the details…
On one hand, it does not make sense to pay +3000$ for a battery that last for +20 years knowing that 7 or 10 years from now technology might change for better, on the other hand it very risky to gamble with a 800$ on a battery that could Last less than lead acid. (Just to make a point here, Personally I am looking for a DIY +30 kw bank and +100kw banks for my brothers and friends )
But I am not a player in that market and that is why I am posting this thread.
In my opinion, the only way to clarify this obscurity is to have members that have bought cells or pre-assembled pack 2 or more years ago to share their experience. Information on price paid, warranty granted, reputation of the supplier, and more importantly how long the pack has been in operation without problems- how many cycles have the pack done and capacity lost, personal opinion about the pack quality, would clarify a lot of information for myself including forum members regarding the expected quality of lifepo4 batteries given a certain Price.
This post is trying to find answers from experienced members only on how many cycles we could expect from these cells.
If a cells is advertised for 3000 cycles on the manufacturer datasheet, and priced within the “good quality” category, would it make +1,500 cycles? Can we expect at least half?
What if it was priced within the “not so good quality” price range? Would it pass the 1,000 cycle mark?