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@wk057 How does this battery failure affect those of us who use Model S modules for offgrid solar storage with 3rd party BMS? Is cell voltage monitoring alone enough to catch and prevent this thermal runaway failure? Are you concerned with your house solar battery being at risk? Edit: found...

The body diodes in mosfets will passively rectify back emf induced current without any intervention from electronics. If battery is left connected, above certain speed this current will begin charging the battery. I assume if towed long enough the battery can be overcharged unless BMS cuts the...

Maybe @Ingineer can re-enable supercharging. I remember him mentioning that he will unlock any salvage car that Tesla disabled. I curious how much he charges for that.

You can tow charge already by putting the car in drive and getting towed. No different than coasting down a steep hill.

I must say, I've been entertained tonight.

Its almost 2018. We still can't reliably stream video online. Why can't Tesla just use youtube live next time?

Wow, this thing is a beast! Looks like something out of broadcast transmitter site. What made you go with big iron transformer and not high frequency SMPS design? What is the standby loss?

Nice to see you still around. What are you working on these days? Did you complete the BMS for your Telsa modules?

$1.6B loan guarantee, not actual cash. Uncle Sam only pays if Vogtle is cancelled. This allows Oglethorpe to get much better interest rate on private loan since US Govt assumes failure risk and the creditor is guaranteed to get their money back. VC Summer did not have federal loan guarantees.

100mi in 9 minutes is only 186kW charge power, not that exciting. No cables and no inductive "method" of charging sounds like below the car power rails. Oh and the car's face is hideous looking btw.

I meant two reactors at Diablo Canyon. 18 TWh per year vs. 4.3 TWh of enabled excess future renewables from this hydro project.

I think concern over environmental impact of two man made lakes is overblown and ridiculous. But hey, it's crazy California where they are shutting down two perfectly fine nuclear reactors which generate over 4 times clean energy than this proposed facility, because now warm water is a pollutant.

There is 1300 MW ~ 20 GWh of potential renewable energy storage capacity right under your noses at Eagle Mountain pumped hydro project located on the site of the inactive Eagle Mountain mine, in Riverside County, California. At $2B project cost and 20 GWh of maximum storage capacity, it comes...

Try to keep it below 60% charged when not needing the range. Avoid the practice of "topping off" the charge, for example charging to 90% after using 20% and so on. Lithium batteries degrade faster at high state of charge.

Recent bill: $224.93 1814kWH 12.4c/kWh, FP&L Florida. EV use was 341 kWh.

Contrary to popular belief on this thread, nukes are not dying yet (this may ruffle feathers of some of you :) Nuclear construction reaches 25-year high (also, he's going to make nuclear great again!)

Forget the stock price. I am more concerned about TT007's well being at this point.

Did TrendTrader take profit?

Hey! I get the same "detent-like" feeling when slowly turning steering wheel on my Nissan Leaf. I think this effect is caused by servo motor driven power steering system. I am not sure if that effect is caused by either steering assist brushless motor "cogging" effect due to use of permanent...

$333.33

Am I doing this right?

I fail to see how this example is relevant at all.

I meant to far away parts of the grid via distant transmission routes that already suffer from congestion.

That right there is false belief that bring much confusion to you. You are still thinking that electricity behaves physically like virtual data packets on the internet, that electric current has a destination address. Are you an IT person by any chance? You don't get to physically "send" your...

Nice fake breakout at the open. Got caught in that unfortunately.

I've added 6 people to my ignore list thanks to this thread. The difference in quality of users back in 2008 when I joined and now is extreme.

Limiting charge rate based on number of DC charge cycles alone and not taking into account power level of these charges sounds like lazy or rushed programming by Tesla engineers. They need to fix that. Honestly, I would ask Tesla to buy my car back unless they provided an option to remove this...

Ah, that could explain it. Watching that flatline price action on Level 2 data was fascinating. There were lots of 10k buy orders flashing momentarily at exactly 295 then disappearing without getting filled. Today's afternoon trading looked quite unusual.

Somebody is doing a good job keeping the price from going below 295 in the past 8 minutes.

Finally a little breakout. This flatness was killing me.

Why do you keep making up unlikely scenarios? Batteries would be placed at the location that draws a lot of power during peak demand, this way alleviating load on the lines feeding that location. Batteries in that way are "portable" and can be placed right next to problematic load.

That sh*t piece is submitted by this guy: Science Errors, How Deterioration of Science Left Wreckage and Ruin. Gary Novak: Independent Scientist, Mushroom Physiologist (LOL), Evolution Biologist, Liberal Progressive, (and Global Warming science denier apparently...)

If you want to DIY then I would go with ground mount array that you can build yourself. Get panels from sunelec.com in miami. They got them so cheap that in FL cost of panels pays off in only 1.5 - 2 years. Then hunt ebay for used grid-tie inverters. Stay away from enphase as they are twice as...

I helped to prevent adding 3 tons to that number by driving EV for a year.

Then the medium voltage distribution network sees less load on a step down transformer feeding that section of the grid. If that whole area starts exporting power, then high voltage transmission network sees less load. If there is so much solar that transmission system goes idle, then you are...

No it won't. You will be powering your neighbors on your low voltage distribution circuit. To the utility your exported power will appear as lower overall distribution load. Releasing stored off-peak energy during peak hours will actually help reduce congestion on distribution and transmission...

For anyone wondering, here is exact parking lot from the pictures above on street view: Google Maps

Someone on DRCTEDGE is putting up 175,000 shares for sale at 295.00 everytime SP tries to get there.

Sounds like you got it. Just setup automatic charge/discharge termination based on voltage of each 72cell block in each module, even paralleled ones. I get what you mean by balancing issues with modules connected in parallel. That issue could be remedied by activating cell bleed resistors of all...

Their problem. They should use water to cool the battery. Very unlikely they can get shocked since the battery is isolated from ground. IF they are afraid, they either need to get educated or quit. Anyway, none of these arguments are valid against use of higher voltage.

It kinda makes sense why they would want 21 cents on peak. Look at it from their point of view. If they are going to lose money on you (you will be saving money each month, otherwise you would stay on flat 11 cent rate) , they at least want you to shift most of your power use into off peak, so...

I only focus on CO2 emissions. Florida has very clean power grid thanks to ~70% of power coming from natural gas. It is very close to California's CO2 per kWh intensity while being 1.5 - 2 times cheaper on average. FPL does offer nice TOU plan, where you would pay 6 cents per kWh 9pm-12pm and...

I think it's safe to assume that we in south-east FL get about 50% night time off-peak (1am-5am) power from our 2 nearby nukes, giving our EVs close to 100 MPG CO2 equivalent compared to gas cars. And don't feel too bad about Crystal River coal plant, it only contributes about 5% of state's...

When accident happens, safety engineering kicks in. Inertia triggered circuit breakers embedded inside the pack would break up the battery into 4 sections of 200V each. Liquid cooling takes up space in the cable, making it thicker or as thick as simply adding more copper. New SiC Fets are rated...

Just watched it. I was pretty good. I think Leo did well and was not a twit at all. He interviewed the right people. Highlight of the movie for me was at 1h28m44s point where he shook hands with Al Gore. Interesting revelation was how much CO2 equivalent does beef production emit. I looked up...

800V is nothing to be scared of. It will be just as safe as 400V via prudent safety engineering. If you want to have 200+ mile EVs and charge them in 15 minutes (once batteries can handle the charge rate), higher than 400V systems will be necessary, unless you are ok with wrestling a fire hose...

They don't need to monitor each of 74 cells in a parallel group since they are guaranteed to all be at the same voltage due to them being connected in parallel via fuse bond wires to the same bus bar. They can only monitor the voltage of that parallel group and compare it to other parallel...

It does not matter if one module or 100. Each module is it's own power unit and has 6 cells in series. You need to know what those cells are doing to ensure they do not get taken outside their safe voltage range. Right now you are assuming BMS will keep all 6 cells in balance always and there is...

You don't know what you talking about. BMS absolutely has to send cell voltages to the host controller. What happens if few cells crap out and now instead of 74 cells in parallel you got 72 cells and now your 230Ah cell group lost 6Ah of capacity? Not monitoring cell voltages at a host level...

Right. But are those BMS boards sending signals to his charge controllers and loads? I don't think so... I am not aware of anyone reverse engineering those BMS boards to make them useful yet.