barnard's Toyota MR2 - now Mr240

Post up a thread for your EV. Progress pics, description and assorted alliteration
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barney
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barnard's Toyota MR2 - now Mr240

Post by barney » Thu, 27 Sep 2012, 01:12

weber wrote: I usually just add a note to the end of them with a link to the new post with the corrected info.

I'll do this, but atm Im not sure how to add a link to an individual post... Ive looked at the FAQ and it didnt help at all.

Cheers, Barney
Plan: Promoting EVS as pico-powerstations. My EV is handmade MR2>ZEV240 (150V 9" DC Warp motor, SkyEnergy batts)
Mr240-electric handmade car

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barnard's Toyota MR2 - now Mr240

Post by weber » Thu, 27 Sep 2012, 01:33

Here's the spreadsheet: BarneySagRatios.xlsx

To obtain the URL of an individual post, right click on the blue bullet Image at the start of the post, and choose "Copy Link Location" or similar depending on your browser. Or left click on the blue bullet, then copy the URL from the browser's URL field.
Last edited by weber on Wed, 26 Sep 2012, 16:25, edited 1 time in total.
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barney
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barnard's Toyota MR2 - now Mr240

Post by barney » Thu, 27 Sep 2012, 01:45

[quote="weber"] Here's the spreadsheet: BarneySagRatios.xlsx

Thanks... Hmmm, Im getting Page cant be found' at the URI of uploads/690/BarneySagRatios.xlsx

Any suggestions? Barney
Plan: Promoting EVS as pico-powerstations. My EV is handmade MR2>ZEV240 (150V 9" DC Warp motor, SkyEnergy batts)
Mr240-electric handmade car

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barnard's Toyota MR2 - now Mr240

Post by weber » Thu, 27 Sep 2012, 02:34

barney wrote:Thanks... Hmmm, Im getting Page cant be found' at the URI of uploads/690/BarneySagRatios.xlsx

Any suggestions? Barney

Seems like a problem with the forum software. Nah. That never happens. Image
Anyway, I put it up on my own website. Try it now.
http://dkeenan.com/BarneySagRatios.xlsx
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).

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barnard's Toyota MR2 - now Mr240

Post by barney » Thu, 27 Sep 2012, 05:17

Many thanks weber.
weber wrote:
Here's the spreadsheet: BarneySagRatios.xlsx
And thanks for documenting my sagging so thoroughly... Image

Cheers, Barney
Plan: Promoting EVS as pico-powerstations. My EV is handmade MR2>ZEV240 (150V 9" DC Warp motor, SkyEnergy batts)
Mr240-electric handmade car

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barnard's Toyota MR2 - now Mr240

Post by T1 Terry » Sun, 18 Nov 2012, 02:06

Any updates on what was found regarding the cell problems? Unfortunately I may have discover by my own mistakes just what has happened and caused your failing cells, I have 2 cells with less than 2 mths use with the same symptoms.

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barnard's Toyota MR2 - now Mr240

Post by jonescg » Sun, 18 Nov 2012, 04:12

I'll let Barney update his thread in good time, but I helped swap out the cells with the highest "sag ratio" as documented above. Charging has been problematic despite our best efforts to bring the new cells up to the same state of charge (SOC) as the rest of the pack. He also has a rather high cell which is tripping out the high voltage cut-off (HVC) point on the BMS well before the rest of the pack is at the same SOC. A well balanced battery is a happy battery.

Barney, as mentioned earlier I can lend you my 6 channel charger to bring any low cells up, but we'll need a fair old load to bring a high cell down. The BMS modules can't shunt 20 A worth of charge unfortunately!
Last edited by jonescg on Sat, 17 Nov 2012, 17:13, edited 1 time in total.
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Post by barney » Mon, 25 Nov 2013, 08:34

Hullo all and I thought I'd provide a better update than just silence - although no news is indeed good news, I would claim.

Havent I been a bad boy… As jonesy so delicately pointed out in the post above - perhaps 12 months ago now! - I have been a bit slack in documenting the 'new batteries', installed after all your help, analytical efforts and advice. You deserve to hear the full story, or at least a summary!

Suffice it to say that there was indeed a grumbly settling-in period and after borrowing the 6-cell charger from joescg HQ (and then buying a few more after blowing up a couple of its circuits, since it was so good I wanted one for me too) I can report things have settled down remarkably. I was led to believe that mixing old and new cells was problematic and potentially suicidal. I can report things have basically returned to normal, thanks presumably to Rod's BMS cell modules, to the point where overnight charging occurs just like before, with a 19A charging on the meter until capacity get to around 95%, then a period at around 1-3A until the voltage gets up around 160+V and the capacity reaches 99 or 100% on the monitor gauge.

The charger then turns off (but leaves two small exhaust fans on until it is disconnected), and by the morning when I turn it off the capacity shows a slight drop has occurred overnight (an average of 2% overnight). After the first 2 or more weeks of problems, charger disconnects and so on, I reckon the charger has thrown a wobbly only twice in the rest of the year since the bad batteries were replaced.

If you'd like more detail, I have recently added a blog post to the ZEV240's website, called…   
What I've learned about managing a traction battery.

Cheers, Barney
Plan: Promoting EVS as pico-powerstations. My EV is handmade MR2>ZEV240 (150V 9" DC Warp motor, SkyEnergy batts)
Mr240-electric handmade car

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barnard's Toyota MR2 - now Mr240

Post by barney » Sat, 04 Jan 2014, 01:18

Selling the ZEV240…

Who said 'The more things change, the more they stay the same'? Well in my case Ive come nearly full circle. Here I am having to sell the wonderful ZEV240 (aka MR240) after all that building and driving - gosh Ive learnt a lot, much of it thanks to you guys on this forum - and this forum has added a dozen entries or so since I started so there are still people with diverse tastes...

Even tho there are now a small number of EV/hybrids available in Australia (and 11 in the US, I read recently) this forum proves that there is still interest in the home-brew approach. Lets hope it translates to someone who wants to BUY my EV! Then I'll be back to where I was 4 years ago, no EV and wondering what's next. The more things change…

Sadly I have to sell the ZEV240 machine - its sporty low profile doesn't suit my wife's knees any more, and I must fix that - I've resisted a long time, but since the machine is now in fine shape after its traction battery upgrade, it seems like a good time. Also, we are going away for a month soon. Perfect timing. She understands my interest in the environment, our over-reliance on oil, and a willingness to try and contribute; but she demands something further off the ground.

Im collecting ideas and suggestions on how to promote/sell it - unless you wish to buy it, of course!, in which case just call me! - but I'm not sure where to sell a trusty 'handmade' steed like this.

It is insured for around $28k, it is in very good condition as a bucket of bolts and nuts said Tristan of WTF Auto, and it drives beautifully and is strangely quiet to ride in, even with the top off. It has all the mod cons of a 1992 Toyota MR2 (a/c, cruise control, all the gauges work including the 'fuel' gauge, etc) as well as mod-mod cons like DRLs and a built-in GPS/stereo with 7" screen and Bluetooth, CD/ DVD player as well as DTV aerial.

Of course its not all perfect, e.g. I wish I'd known that 15kWh of batteries was not enough to do the 100km I wanted, but there are more and more EV charge points around and it's easy to get people to provide a random charge. I have charge cables for all the usual standard plugs, including Fremantle Council's free parking charging in Henderson St, all City of Perth parks (5pin 3 phase plug) and of course 15A extension cord for casual use. I get to work and back, over 50km, and still have over 40% capacity left, so it has enough range to be useful; and of course can still be upgraded if you want to put in the latest automotive-grade lithium (EIG) cells - twice the distance AND half the weight!

Two questions: 1. Where do I advertise it? WIll CarSales.com.au be enough, or will it sell on Gumtree in the end? Sunday Times (Lotus - NO, MR2 electric EV…); Unique Cars? But neither the mag nor the uniquecarsales site have EV as a category! Maybe unique but also invisible!
And 2. What is it worth? I paid a lot more but assume these things depreciate… but what is acceptable?

I'd really appreciate your comments, so if you have a moment, please give me some ideas!

Cheers, Barney
Last edited by barney on Fri, 03 Jan 2014, 14:20, edited 1 time in total.
Plan: Promoting EVS as pico-powerstations. My EV is handmade MR2>ZEV240 (150V 9" DC Warp motor, SkyEnergy batts)
Mr240-electric handmade car

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barnard's Toyota MR2 - now Mr240

Post by g4qber » Sat, 04 Jan 2014, 03:45

i typed in "custom sports cars for sale australia" into google for ideas.

interesting what is returned.
http://www.autotrader.com.au/cars-body/ ... -for-sale/


also "custom sports cars for sale australia new zealand"
http://www.tradingpost.com.au/Automotiv ... sic/Browse


this might be a good forum
http://www.diyelectriccar.com/forums/


"mr2 for sale australia"
here is a sample result
http://www.carsales.com.au/private/deta ... 10&sdmvc=1
Last edited by g4qber on Fri, 03 Jan 2014, 17:02, edited 1 time in total.

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barnard's Toyota MR2 - now Mr240

Post by antiscab » Sat, 04 Jan 2014, 09:58

tough call on the valuation

you can buy a nearly brand new manufactured electric car with full warranty and back up for ~$22k, that goes further

but then the MR2 is nicer to look at

I would suggest the value would be somewhere between the value of the turbo variant (~$12k) and the cost of a nearly new EV (~$21k)

bearing in mind you may need an adapter to use the new J1772 charge stations that are popping up around the place
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barnard's Toyota MR2 - now Mr240

Post by barney » Mon, 06 Jan 2014, 08:01

Thanks to g4qber and antiscab for the feedback. Nice to have an outsider's comments! Gee, there I was thinking that deep down this was a marque and it's uniqueness was going to set it apart for the Porches and Karmann Ghias, or even above them. ;-)

And I take the point about J1772 connectors, Matt. Of course it already has 3 'standard' connectors, but you can never have too many standards, right? ;-) I can get one from the US for $134 plus shipping. Anyone want to go a bulk order and share shipping costs?

I too know that EVs should get cheaper in time, but one journo seems to be gloating more than he needs. Then I found the EV tradin' post site in the US and thought time I started THAT over here. Trouble is the first car is a crappy MR2 and he's asking $1500!

There is a neat Volvo C30 wagon AC conversion from 2008 (didn't we read about its build from the guy at Pure EV?) with 90 100Ah lithiums which sounds good value at $17,500, shame its not the car it once was, since the new owner has tortured the batteries, it seems.

Funny to be advertising the ZEV240 as a 'unique vehicle' alongside some boring hot utes!… I'd imagine it is slightly less problematic, overall, than some hotted up ICE mainly-street-legal dragster, if only cos the exhaust system is never going to attract police attention!

Seems I'll get more coverage if I plaster it with signage and park along the highway for a few hours each day… In the meantime Im uploading the new photos from yesterday's sunset photo shoot (see Album; some quite good, actually) and hoping that the next visitor to my site - where it's imminent sale is flagged - is also the buyer I'd like. Wish me luck!

Anything else (other than the price aint gonna be good) that I need to know?
Plan: Promoting EVS as pico-powerstations. My EV is handmade MR2>ZEV240 (150V 9" DC Warp motor, SkyEnergy batts)
Mr240-electric handmade car

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barnard's Toyota MR2 - now Mr240

Post by Gabz » Mon, 06 Jan 2014, 14:16

just go for the most typical purchaser put flyers around the electrical engineering department at the local university.

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barnard's Toyota MR2 - now Mr240

Post by g4qber » Mon, 06 Jan 2014, 14:37

http://www.evworks.com.au/

What about sticking it on this page?
Contact rob?

http://www.evworks.com.au/index.php?product=319
Last edited by g4qber on Mon, 06 Jan 2014, 03:38, edited 1 time in total.

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