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hbpowerwall

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Oct 7, 2016
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1,976
I can't imagine ever doing it again !!!!
 

hbpowerwall

Administrator
Joined
Oct 7, 2016
Messages
1,976
I have a good budget for LifePo upgrade but those dam regulations really limit what i can do.. it's really about future income - can't spend money if i can't continue to make it the same way i used to.
 

Wolf

Active member
Joined
Sep 25, 2018
Messages
1,561
I can’t imagine building a wall out of 18650’s.. you got to much time. ;-p
I can't imagine ever doing it again !!!!
For the purist in me, do I have to remind everyone this board is called Second Life Storage. As in reusing what was going to go to a landfill to power our homes. The problem is that recycling takes time and effort. I understand that. I for one will continue the tradition of sourcing USED batteries, testing and constructing DIY batteries from what was going to go into the waste stream instead of buying ready made batteries that require little to no effort to construct into a working powerwall. If I wanted that I could go out and buy a Tesla or some other variation as it seems everyone is jumping on the PW bandwagon. https://www.businessinsider.com/rechargeable-battery-options-compete-tesla-2017-5

No not me. I am not going to be buying brand new LifePo4 (or any other) batteries and contributing to the waste stream just because it is easier.
Quoting a former US president. “We choose to go to the Moon in this decade and do the other things, not because they are easy, but because they are hard." I do not equate building a powerwall from used cells to going to the moon but nevertheless the analogy is there. To build a successful powerwall from used cells a lot of things have to be observed and rules need to be followed. Otherwise bad things happen. https://secondlifestorage.com/index.php?threads/when-things-go-wrong-it-can-go-really-wrong.10317/
I am not belittling the journey to move to new cells as unpatriotic but maybe a new board and if not that, at least a Forum that deals with new battery powerwall construction.
You can have my used 18650s when you pry them from my cold dead hands.:p

Wolf
 
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OffGridInTheCity

Active member
Joined
Dec 15, 2018
Messages
1,706
And I'm so far into 18650 (nearing 10,000 cells) I need another 22.401yrs to get my money back according to my purchase tracking Excel sheet as of this morning.

I am a bit jealous of the 'ease' of hooking up LifePo4 cells, the promised life-span, and the promised safety increase - but I think I've really and truly saved a TON of $ by using my spare time to build my battery bank out of used cells. The price/cell has fallen over the last 3 years - maybe it will continue to fall.

By having so many 'small units' - it will be interesting to see how maintenance goes. For the long-term, it might actually be less expensive to recondition a pack compared to larger LifePo4 brick units. Unfortunately - just don't have *any* experience here yet - hasn't been long enough.

And the battery bank itself is performing so well - I have to remind myself to actually go below now and then to stare at it 'just in case' something's amiss. The main question now is 'how real' is the long-life chart on Battery University. If I actually live another 22.401yrs I'll be sure to report back :)
 
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italianuser

Member
Joined
Feb 25, 2020
Messages
335
... another 22.401yrs ...
... You know, in italian you read that 22 thousand 401, so that was my first read LOL :ROFLMAO: I was sort of "OGITC what are you doing wth!!"

And, yes, I do agree with recycling for green power. And that it takes a real big effort making this stuff , surely my biggest "hardware" project ever.

I'd like to try car lithium batteries, maybe next year when I finish this first solar battery pack(y)
 

hbpowerwall

Administrator
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Oct 7, 2016
Messages
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My issue was the added time of recording and editing.. it sure was a journey - More Mini's and Bees and fewer batteries for me for the foreseeable future..
 

hbpowerwall

Administrator
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Oct 7, 2016
Messages
1,976
I've looked into getting LiFePo4 cells - it but can't find an electrition to help me install and make it legal and insurable :( Happy the BMS has my back last night- Cell 51 went crazy low - woke up connected to grid but not on fire so that's a bonus.
 

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hbpowerwall

Administrator
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Oct 7, 2016
Messages
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Batteries have been going for 5 years now, that's as long as I really expected it to run, I would say I've gone from 40kw useable to 25, with maintenance I'll get that back to 35kwh useable but it a heck of a job doing that much testing.
 
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