diy solar

diy solar

This is what 60KWH looks like

AntronX said:
By the way, what do you think of this DIY grid tie inverter project? https://jamesfotherby.com/index-page/600w-grid-connected-inverter-v5/ I am thinking of building one to learn about inverter design and couple it with very cheap 12c/w used panels to save money on power bill (for a friend). This will not be getting inspected obviously.
Click to expand...

Buy a used UL1741 inverter if you want to "learn" is my short response

Bit longer opinion ( you know the saying about opinion's and the lower rear anatomy? )

Grid-tie inverters are a dime a dozen, and one need foundational electronic and power electronics education before venturing into the weeds of circuit design and grid energy injection devices.

What exactly are your goals in this education? what skill or degree's do you have in power electronics before tackling something like the link above?

My 1.587 cents is this isn't anything 99.9999% of the population should be tinkering with, if you feel your the remaining 0.0001% then you don't need to consider what I wrote
 
Supervstech said:
Beware of cable routing issues. I see that they are not in place yet, but be sure all positives are the same length, and all negatives are the same length… route the longest one neatly between the cells, well protected from any abrasion, then make ALL the same polarity cables the exact same length…
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Every cable is the same length +- 5mm
 
Supervstech said:
Beware of cable routing issues. I see that they are not in place yet, but be sure all positives are the same length, and all negatives are the same length… route the longest one neatly between the cells, well protected from any abrasion, then make ALL the same polarity cables the exact same length…
Click to expand...
Heavy cables are double insulated and same length +- 5mm
 
LydMekk said:
I would put these outside in a small concrete bunker with ventilation and only the feed cables going into the main building...
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The battery looks portable but will never move once commissioned it will sit outside approx 400 mm of my house brick wall which will be lined in sheet to the required specs
 
yabert said:
This is important in theory, but without knowing the current pull by each battery in parallel, the reality can be different.
It seem that Austenpowers build a 74V battery, so except if it goal is to pull 40 kW from this one continuously, those cable are way to big for nothing.
I would like to know what will be connect to this battery, but I guess there is chance those heavy cable will pass less than 30A only.
That is still 11 000W (74V x 30A x 5)
Click to expand...
16s x5 each cell is a 3p 60ah cell in 16s config each tower has 8s . The cables I had and I know there over kill but there double insulated and all the same length +-5mm
 
meetyg said:
How do you know these aren't defective modules that came off Chevy Bolt EVs (the ones that caused fires and a massive recall) ?

I'm mean it's one thing to use second hand Lithium Ion packs, but whenever I hear LG CHEM, it makes me worry...

I do have to say that it looks pretty compact for 60kWh. Probably due to the higher energy density of those Lithium-Ion, compared to LFP.
Click to expand...
These cells are dated 2019 and 2020 I'm assuming there replacement battery's as there performance would have dropped and been replaced with new I would say they have seen a fair amount of cycling with a high volt and hi current and now there going to power my home 5kw battery inverter so there going to provide very little current at 110ah devided between 5 packs and that's peek use ... really hoping I'm not in fire territory as it's low voltage compared to 900v in car many battery's in series.
 
Fun project. I’d want them far enough from the house that they could burn up unattended and not involve the structure. 15” horizontal to brick, maybe. What’s the vertical clearance to combustibles?
 
Austenpowers said:
These cells are dated 2019 and 2020 I'm assuming there replacement battery's as there performance would have dropped and been replaced with new I would say they have seen a fair amount of cycling with a high volt and hi current and now there going to power my home 5kw battery inverter so there going to provide very little current at 110ah devided between 5 packs and that's peek use ... really hoping I'm not in fire territory as it's low voltage compared to 900v in car many battery's in series.
Click to expand...
EV battery warranties are usually relevant if SOH drops below 70%.

Most modern EVs (excluding Nissan Leaf) have active cooling/thermal management which helps alot with minimizing degradation.

I really doubt that Hyundai/Kia EVs from 2019-2020 would have 70% SOH.
Just for comparison , my EV from Jan. 2021, with 40k km on it has 93% SOH.

I don't want to be a party pooper, especially since you already bought the batteries. But I really think you should know what you have on your hands. Be aware that these are most likely modules that came off recalled battery packs. With all the dangers included.

As an EV owner and fan, I followed the LG CHEM saga closely. Fortunately, my EV uses CATL cells. The LG CHEM packs were found to have a manufacturing defect, which causes internal shorts and hence fire/combustion.
Anyways, the one thing I'm not sure of with the whole recall saga, is, if they were able to identify or discriminate bad modules from good modules. I think that if the defect was easily identifiable, they would have found it early in quality assurance checks. The fact is that they didn't. Maybe because it hard/impossible to identify the defect on a working battery pack, until it's too late.

Just looking out for your safety...
 
meetyg said:
EV battery warranties are usually relevant if SOH drops below 70%.

Most modern EVs (excluding Nissan Leaf) have active cooling/thermal management which helps alot with minimizing degradation.

I really doubt that Hyundai/Kia EVs from 2019-2020 would have 70% SOH.
Just for comparison , my EV from Jan. 2021, with 40k km on it has 93% SOH.

I don't want to be a party pooper, especially since you already bought the batteries. But I really think you should know what you have on your hands. Be aware that these are most likely modules that came off recalled battery packs. With all the dangers included.

As an EV owner and fan, I followed the LG CHEM saga closely. Fortunately, my EV uses CATL cells. The LG CHEM packs were found to have a manufacturing defect, which causes internal shorts and hence fire/combustion.
Anyways, the one thing I'm not sure of with the whole recall saga, is, if they were able to identify or discriminate bad modules from good modules. I think that if the defect was easily identifiable, they would have found it early in quality assurance checks. The fact is that they didn't. Maybe because it hard/impossible to identify the defect on a working battery pack, until it's too late.

Just looking out for your safety...
Click to expand...
Hopefully degradation will slow since they are no longer exposed to large currents, thermal cycles and vibrations.
 
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meetyg said:
EV battery warranties are usually relevant if SOH drops below 70%.

Most modern EVs (excluding Nissan Leaf) have active cooling/thermal management which helps alot with minimizing degradation.

I really doubt that Hyundai/Kia EVs from 2019-2020 would have 70% SOH.
Just for comparison , my EV from Jan. 2021, with 40k km on it has 93% SOH.

I don't want to be a party pooper, especially since you already bought the batteries. But I really think you should know what you have on your hands. Be aware that these are most likely modules that came off recalled battery packs. With all the dangers included.

As an EV owner and fan, I followed the LG CHEM saga closely. Fortunately, my EV uses CATL cells. The LG CHEM packs were found to have a manufacturing defect, which causes internal shorts and hence fire/combustion.
Anyways, the one thing I'm not sure of with the whole recall saga, is, if they were able to identify or discriminate bad modules from good modules. I think that if the defect was easily identifiable, they would have found it early in quality assurance checks. The fact is that they didn't. Maybe because it hard/impossible to identify the defect on a working battery pack, until it's too late.

Just looking out for your safety...
Click to expand...
Thank you for this comment.... I know I have cells that could ignite while in use . I know there impossible to put out till the chemical reaction stops .... I'm not pitting these battery's inside ... there outside ... there in a cement sheet and steel box ... the cement sheet is dual layer with fibre glass insulation between the layers if one goes they all will . I truly believe that the only danger to a battery fire is the battery box and battery's only ... these battery packs were striped and tested and reassembled but there was reports with them . Every individual cell was exactly the same voltage and I purchase 2 19s packs and 3 20 s packs . Not every ev with these battery caught fire .... we have to keep this in mind . It's a gamble when 100% operational this project will have cost me 1300 bucks Australian ?
 
Good luck !

Looks like a fun project and if your covering the fire hazards I think its worth going for especially at that price.
 
You know you can actually buy real sprinkler heads quite easily and plumb them into a suppression system. As others said it may not stop the fire but it will certainly slow it down. And I also like the plastic sandbag idea. Good luck to the OP, not something I would be doing given current knowledge.
 
Austenpowers said:
16s x5 each cell is a 3p 60ah cell in 16s config each tower has 8s . The cables I had and I know there over kill but there double insulated and all the same length +-5mm
Click to expand...
Ok, so each pair of 8S battery is coming from a different EV (you have a battery coming from 5 EV) because most modules in a Kia/Hyundai are 10S.
So, 59V battery with 66V-48V range. What will be connect to this battery?
 
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