Battery ideas?

[David Shields]

Does anyone have a suggestion about buying a 120 volt, 100 AH (minimum) Lithium battery pack? My Porsche 914 conversion is about to need its third set of batteries and I'm really tired of using lead-acid AGM batteries.

I'm using an Elcon charger by the way.

Thanks,

David Shields

[Peter C. Thompson]

Hi David,

I guess it depends on your budget.  I did a google search for "custom EV battery pack 120v" and got a few hits.  One place is asking $7000 for a pack without BMS or charger.

Cheers, Peter

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[David Hale]

I've had good success with a Chevy Volt pack. You can find them at salvage yards. I paid $2500. The down side is that I paid that much again for a BMS. The Volt pack consists of seven 48v/45Ah modules and two 24v/45Ah modules. I bought a complete pack from a salvage yard, plus a couple of extra modules from someone else that did the same but didn't need the entire pack, and through a series/parallel combination ended up with 224v/90Ah. I have put about 20,000 miles on this pack over two years and it's still going strong. I'm also using an Elcon charger. Dave.

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[Stephen Federico]

I can not say enough good things about buying a used Chevy Volt battery from a junkyard. You can do a search on  car-part.com/  and find the closest ones and compare how many miles they have on them and prices. I got my first one for about $2150 with under 25k miles on it about 3 years ago and then found a 2nd one at some guys house that I pulled out myself for $700. They're relatively simple to disassemble (buy yourself some 1000 volt gloves if you don't have them already) and I just watched one youtube video and was able to do it myself. A 120v string will be about 100lbs, and you can get 3 complete ones (I think if I remember correctly) from one battery. So your range will get a huge boost on top of the major weight loss.

My 2c

Stephen

On Thu, May 3, 2018 at 5:50 PM, David Shields <dshie...@hotmail.com> wrote:

[David Shields]

I can buy a used Nissan Leaf for $9,000 but I plan to keep my 914.

Decisions, decisions.

Thanks Peter

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From: 91...@googlegroups.com <91...@googlegroups.com> on behalf of Peter C. Thompson <pthomp...@gmail.com>
Sent: Friday, May 4, 2018 2:27 AM
To: 91...@googlegroups.com
Subject: Re: [914ev] Battery ideas?

 

[David Shields]

Thank you Stephen, that's an excellent idea.

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From: 91...@googlegroups.com <91...@googlegroups.com> on behalf of Stephen Federico <2piesf...@gmail.com>
Sent: Friday, May 4, 2018 3:26 AM

To: 91...@googlegroups.com
Subject: Re: [914ev] Battery ideas?

I can not say enough good things about buying a used Chevy Volt battery from a junkyard. You can do a search on  car-part.com/  and find the closest ones and compare how many miles they have on them and prices. I got my first one for about $2150 with under 25k miles on it about 3 years ago and then found a 2nd one at some guys house that I pulled out myself for $700. They're relatively simple to disassemble (buy yourself some 1000 volt gloves if you don't have them already) and I just watched one youtube video and was able to do it myself. A 120v string will be about 100lbs, and you can get 3 complete ones (I think if I remember correctly) from one battery. So your range will get a huge boost on top of the major weight loss.

Car-Part.com--Used Auto Parts Market car-part.com 185 Million used auto parts instantly searchable. Shop our large selection of parts based on brand, price, description, and location. Order the part with stock number in hand.

My 2c

Stephen

On Thu, May 3, 2018 at 5:50 PM, David Shields <dshie...@hotmail.com> wrote:

Does anyone have a suggestion about buying a 120 volt, 100 AH (minimum) Lithium battery pack? My Porsche 914 conversion is about to need its third set of batteries and I'm really tired of using lead-acid AGM batteries.

I'm using an Elcon charger by the way.

Thanks,

David Shields

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[David Shields]

This sounds like a winner to me.

Thanks Dave.

PS: I like astronomy too.

David

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From: 91...@googlegroups.com <91...@googlegroups.com> on behalf of David Hale <astrono...@gmail.com>

Sent: Friday, May 4, 2018 3:26 AM

To: 914ev

Subject: Re: [914ev] Battery ideas?

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[Richard M. Rodriguez]

914 is way cooler

[David Shields]

You're so right Richard.

Your old odometer works great by the way.

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From: 91...@googlegroups.com <91...@googlegroups.com> on behalf of Richard M. Rodriguez <rick...@san.rr.com>
Sent: Friday, May 4, 2018 10:25 PM

[Richard M. Rodriguez]

Glad to hear it.

On your original topic...

I am still using the voltronics LiFePO 180AH cells (38 of them) in my car which has over 84,500 EV miles. 

the batteries have lost some capacity but I can still go 100 miles.

NO BMS by the way.  I use Jack Riccard’s bottom balance method to keep my batteries healthy.  I count amp hours used every drive and

rarely use over 100Ah per day.  I slightly under charge them and never over discharge them.

8 years and 84.5K miles still going.  They did cost me close to $10,000 at the time though

Now salvaged batteries are a much better deal.  However these chemistries are slightly different from the lego block cells I have.