Hi Guys, All the ev's potential


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Craigeng

New member
Joined
Sep 19, 2022
Messages
7
I have been a generator for many years now and wanted to expand the help to our planet by re purposing a dead ev.
I must be in the minority but I do think it is so important to stop all this crap going into landfill.
Was so surprised how little is going on on the site taking into account more and more are becoming available?
48v and laptop batteries are, I think an easy alternative but offer no real alternative to the grid?
5 Kw... 10 Kw.... feels such a waste of time at such a major expense? Any serious life and budget changing alternative has to be HV???
 

floydR

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Joined
Aug 23, 2017
Messages
1,527
Safety is the biggest reason. Many DIYers aren't comfortable working with high voltages of an Ev battery, equipment is cost is another. (High Votage equipment tends to cost more.) Until manufacturers include V2L capabilities on there EVs just plugging in an Ev won't be an option.
and there are many threads on using modules and complete packs of course the batteries are usually out of the vehicles.

https://secondlifestorage.com/index...r-gw6000-eh-with-ev-battery-chevy-volt.10300/ for instance
Any serious life and budget changing alternative has to be HV???

Most don't have the equipment for working on High Voltage systems or training to work with high voltage Dc. High voltage Gloves, insulated tools, Arc flash Glasses/goggles, Etc.
Most don't have a written off EV to use. DIY is work.
Later floyd
 

Korishan

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Jan 7, 2017
Messages
7,071
The other issue to consider is that EV packs usually cost a lot more too, at least up front. And a lot of DIYers don't have loads of cash to toss at something like that, at least in one go. It's a lot easier to purchase $1k of equipment now, then another later, instead of dropping $3-4k at once on a single pack. And yeah, I know there are some packs that are cheaper, but they are usually older too. Or they aren't available in your area and need to drive 5+hrs one way to get a pack, so time becomes an issue as well.

It's not that there aren't members who haven't done this, there are several. It's just that for most it's not as economical in the upfront costs.

Plus all what Floyd mentions ;)
 

italianuser

Member
Joined
Feb 25, 2020
Messages
546
I have been a generator for many years now and wanted to expand the help to our planet by re purposing a dead ev.
I must be in the minority but I do think it is so important to stop all this crap going into landfill.
Good point, I fully agree, at least somebody does think about it. A minority? yes
Was so surprised how little is going on on the site taking into account more and more are becoming available?
48v and laptop batteries are, I think an easy alternative but offer no real alternative to the grid?
I can tell you 48V systems are surely a good starting point and pieces are quite easy to find, starting from notebook batteries. What @floydR says about the risk/safety factor it true for me.
5 Kw... 10 Kw.... feels such a waste of time at such a major expense? Any serious life and budget changing alternative has to be HV???
I don't have a big budget for my DIY applications, agreed @Korishan . That's why I chose to make a 10KWh lithium storage based on second hand cells.

Expense? Little, for a DIY system compared to an off-the-shelf solution.
Time and effort? High.

But this is exactly the point, well it's my point. I couldn't afford a new solar system, and money does stop many from entering this world. So here I suppose "recycling" is the word.

And the last and most serious point is the "life changing" aspect. I speak with so many people and most, speaking about electric cars, always come back with "but the autonomy is too small, I can't do as many kilometers as with petrol". What I say is that life change means rethinking habits, must we really always go so fast?

And so many questions come up, in some way connected to my "DIY mentality":
- can I change my electricity usage habits? Yes, mine yes, but what about my families' habits and my friends... uhm
- can I change my transportation habits? Yes, I go slower with a bike, but I can. My city has no hills, maybe in S.Francisco it's more difficult for Electric bikes
- my cooking habits? Maybe I could cook less, yes I could, I do
- ...and I can live with no air conditioning, in the south of Italy (over 40°C/104°F in summer, humidity medium or high) , every year only 3 or 4 days are really really critical - I can live with ventilators

I'm the sortof perfect guy for a green(-er) world. After all it's about our (bad) habits and our time perception... our biggest excuse is "I have no time"... (not true!)
 

OffGridInTheCity

Active member
Joined
Dec 15, 2018
Messages
2,218
For me, the prices were too high, reliable vendors to buy used were not known, and too difficult to disassemble to base cells/pouches. Pulling cells out of modem / laptop packs I can handle :)

Early on I was highly attracted to Leaf 2s2p lithium-ion as I could build a 14s lithium-ion complimentary to 14s 18650 lithium-ion but... as far as I could tell they all had low capacity per the original specs which is contrary to my goal of 85%+ capacity for a hope of a 15year life-span for my powerwall.
View: https://youtu.be/fLNzF3EpTQk


Earlier Tesla modules are 6s - not compatible with my 14s powerwall and none of the tesla modules are practical to tear them apart to get to the cells as far as I can tell.


Later on I watched @DavidPoz recondition a Chevy Gen 2 battery / test each module - but where would one buy one reliably and it was too late for me at that point.
View: https://youtu.be/ot3IhsUfFS8


In all the cases, in the early years as the powerwall took shape, was not able to establish a reliable, long term vendor which means no way to know what you're buying and to buy compatible cells/batteries over the future years as one expands.

For me, they aren't as practical as it might seem at first blush. I'm still confident I can buy 2nd hand 18650 cells and maintain my powerwall for several years to come by swapping in/out bad packs. And of course.... 2nd hand 18650 need to be recycled as well! :)
 
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Craigeng

New member
Joined
Sep 19, 2022
Messages
7
I love the enthusiasm of the folk on this site.... I think I see things a little different because I need more power than most on here.
Oils has doubled in price and If we have a harsh winter in the north of England we can burn 3 x 1400 litre tanks of fuel and at almost £1.00 per litre well all of a sudden a few thousand pounds on a 50 Kw ev battery seems acceptable.... compared to a power wall of 10Kw at more money?
I want to run two inverter heat pumps that can pull 3Kw at full power.... if I can recharge the batteries on off peak electricity I make a vast difference not only to my bills.... to the carbon emissions on the planet?
I do understand this is a hobby for many and it has so many fascination's but any thing we can do to protect our earth well......
 

Korishan

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Joined
Jan 7, 2017
Messages
7,071
we can burn 3 x 1400 litre tanks of fuel and at almost £1.00 per litre
Ouch!!! o_Oo_O
I do understand this is a hobby for many and it has so many fascination's but any thing we can do to protect our earth well......
There's a lot of us who have started this project as a hobby, then over time the hobby has become practical for every day use. Partly the reason it starts as a hobby is because we need to first learn and understand all the parts. Once we get a pretty good grasp on things, and realize the potential of what we can do with that, that's when it really starts to take off and become a way of life.

@The Kilowatt Challenge is an example of someone who is doing things more like what you are looking at doing and jumping full steam into practical use. Not saying there is anything wrong with that at all. The biggest take away is to basically do your research before you go building stuff and hope it works, or works safely. As TKC has learned, even planning has had its issues. He's recently had to almost redo his whole system because of the changes made in Sweden and his previous build was no longer acceptable under the current regulations. So lots of research is needed, and then revisit the research several times to verify nothing stupid has changed.
 
Joined
Nov 20, 2019
Messages
110
@The Kilowatt Challenge is an example of someone who is doing things more like what you are looking at doing and jumping full steam into practical use. Not saying there is anything wrong with that at all. The biggest take away is to basically do your research before you go building stuff and hope it works, or works safely. As TKC has learned, even planning has had its issues. He's recently had to almost redo his whole system because of the changes made in Sweden and his previous build was no longer acceptable under the current regulations. So lots of research is needed, and then revisit the research several times to verify nothing stupid has changed.
Yep, @Korishan is bang on, plus I would say read the manuals, read the rules, read the forums, read the specs and then when you think your ready, read it all again. Start small, grow big and learn as you go and if you dont know, ask ;-)
 
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