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  #1  
Old 02-22-2012, 08:20 AM
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Default Tesla's 'Brick' Problem

Michael Degusta, who has a $5000 deposit on a Tesla Model S, uncovers a potentially serious flaw in the company's battery design that could leave inattentive Roadster owners with a $40,000 bill or a useful vehicle.

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Old 02-22-2012, 10:26 AM
gyronut gyronut is offline
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Default Re: Tesla's 'Brick' Problem

That's really a killer....
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Old 02-22-2012, 11:16 AM
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Default Re: Tesla's 'Brick' Problem

Follow the warranty rules and you will have no problem. I have a Leaf and it is stated not to leave my vehicle for more than two weeks unplugged if you have less than a full charge. If you have an electric vehicle you NEED to USE it. So sad too bad to those that don't follow the rules. I use mine daily and will not have that issue. If you leave for an extended period you charge it up and leave it plugged in with a proper charge station. No extension cords or leaving it for months un-plugged while taking the slow boat to Japan. Sorry it is not a killer deal. If your not going to drive it don't buy it. Simple.

Pete
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Old 02-22-2012, 11:17 AM
gottdi
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Default Re: Tesla's 'Brick' Problem

I left mine for two weeks unplugged with a full charge. Guess what? I still had a full charge when I got home.
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Old 02-22-2012, 11:35 AM
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Default Re: Tesla's 'Brick' Problem

Isn't the leaf smart enough to have a maintenance mode too? It seems like 1/2 the price gets you 2x the engineering.

With a $40K battery pack they should have:
electronic switch to engage storage mode, user selectable and software triggered at 10% SOC.
physical switch, manually activated or triggered at 5% SOC.
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Old 02-22-2012, 11:38 AM
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Default Re: Tesla's 'Brick' Problem

No maintenance mode that I am aware.
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Old 02-24-2012, 01:55 AM
gor gor is offline
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Default Re: Tesla's 'Brick' Problem

Quote:
Originally Posted by gottdi View Post
Follow the warranty rules and you will have no problem. I have a Leaf and it is stated not to leave my vehicle for more than two weeks unplugged if you have less than a full charge.
...
Pete
Quote:
Originally Posted by gottdi View Post
I left mine for two weeks unplugged with a full charge. Guess what? I still had a full charge when I got home.
Yes, there is very easy technical solution in basically any electric car (even diy) to this "problem", especially for EV Tesla class.
Their manual doesn't states - do not leave unplugged for 2 weeks (like on Leaf) it says - you can leave it unplugged for couple of weeks (not recommended). Drain: 50% - first week, 5% per day - after, which takes next 10 days to drain 50% of what left (to 25% total), 7+20 days - to 12.5% total.
No clear warning on 5-2 & 5-3 as it is in 9-3, suggests - this "problem" shouldn't even be there, such "teething problems" can and should be resolved immediately. Settle, rebate, insurance or other deal in such cases - whole situation will look and feel different - won't be a situation.
Now it's getting ridiculous, but their bad PR and poor handling of whole situation - casts shadow and not a good favour for EV community.

Last edited by gor; 02-24-2012 at 02:22 AM.
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Old 02-24-2012, 09:31 AM
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Default Re: Tesla's 'Brick' Problem

Here is Teslas response:

http://www.teslamotors.com/blog/plug-it

The earliest Roadsters will take over two months to discharge if parked at a 50 percent charge without being plugged in. From that starting point, Tesla has consistently innovated and improved our battery technology. For example, a Model S battery parked with 50 percent charge would approach full discharge only after about 12 months. Model S batteries also have the ability to protect themselves as they approach very low charge levels by going into a “deep sleep” mode that lowers the loss even further. A Model S will not allow its battery to fall below about 5 percent charge. At that point the car can still sit for many months. Of course you can drive a Model S to 0 percent charge, but even in that circumstance, if you plug it in within 30 days, the battery will recover normally.
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Old 02-22-2012, 11:38 AM
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Default Re: Tesla's 'Brick' Problem

Quote:
Originally Posted by gottdi View Post
Follow the warranty rules and you will have no problem.
That's fine if the warranty is reasonable, not always plugged in when parked.

Sir, our gps records (you know we're tracking you, right?) indicate that you stopped at a 7-11 2 years ago and bought a twinkie without plugging in to charge. We have tracked your current battery issues back to that event and can, regrettably, offer you no warranty coverage.
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Old 02-23-2012, 04:45 AM
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Default Re: Tesla's 'Brick' Problem

I'm curious if this scenario is common to all EVs or just the battery technology used by the manufacturers?

Do DIY available LifePO4 (?) batteries have the same behavior?
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