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Comment: Re:Far too expensive for a used car (Score 2) 42

by Smidge204 (#49607349) Attached to: Tesla Adds Used Models To Its Inventory, For Online Purchase

From owner's estimations, ~90% of the battery's stated capacity is actually available for use. The 10% is not so much "fail-over" capacity as it is a buffer to keep the battery away from the extremes of charge/discharge states, where most of the degradation occurs.

Your cell phone battery has no problems charging to 100%, since you want to get as much energy (and therefore use time) in there as possible for the weight. However, charging to 100% harms the chemistry, and after a few years the battery no longer lasts as long. That's fine for a cell phone - part of it is planned obsolescence, part of it is the reality that a lot of people won't keep their phone more than a few years.

In an EV you have the luxury of maintaining a charge buffer, since the added weight and cost is fairly minimal and people have a much higher expectation of long-term performance.

So usage pattern + design (thermal management) + energy management which does prevent the user from destroying it = significantly different performance degradation profile.

Comment: Re:2kW isn't enough power for a home (Score 1) 502

by swb (#49604739) Attached to: Tesla Announces Home Battery System

Why would you do that? Every single one of those things has an off switch. In all but extraordinarily rare cases, use of every one of those things is discretionary. You don't need to rewire your panel in order to keep the house running during quite a long power outage. Just don't use heavy draw appliances. If you are affluent enough to buy one or more of these battery packs in the first place, you can certainly afford to buy a few paper plates and an extra pair of underwear, if it comes to that.

What happens when you're not home and the base load goes away and the battery kicks in and your draw exceeds your output capacity? Maybe if you're actually home you can turn off anything high load or that's discretionary, but if you're not you'll overload the battery and I'm assuming it will either current-limit itself via voltage drop or just plain shut off output, which is probably the sanest/safest to prevent damage.

What would be nice would be a smart panel that kept track of the load on all the breaker legs, each of which could be assigned a priority level. Loads could be assigned "always off on battery", "switchable", "always on" and the system could disable switchable loads to ensure that there was sufficient power for always on loads, and the priority setting could be used to switch off "always on" loads so that the highest priority loads could keep running as battery levels dropped.

Regardless of your individual situation, it's a gamechanging device for the vast majority of the world.

I'm not sure how gamechanging it really is.

Comment: Re:He's also an interesting candidate for this (Score 1) 344

by swb (#49604635) Attached to: Bernie Sanders, Presidential Candidate and H-1B Skeptic

What about actual markets in predominantly rural and agricultural economies?

People show up to buy and sell their commodities, nobody has a monopoly on supply, no purchaser is big enough to swing prices, information asymmetry is low -- you can walk around the market and check on the quality of commodities, determine prices and supply levels, etc.

Comment: What about hacking the system for drugs? (Score 1) 63

by swb (#49604595) Attached to: Hacking the US Prescription System

I always thought we'd hear about the prescription system hacked for drugs, not for personal information.

There's a ton of pharmacies out there, how do "they" know where to send shipments? How do "they" verify that a shipment is going to an actual pharmacy and not a shell entity, especially if its CVS store #1887?

What about actual prescriptions? Many are electronically transmitted to the pharmacy. The schedule II ones (at least when I've been given oxycodone) are printed on paper, but how is that data correlated with the prescribing doctor as legitimate?

Is every order printed out on paper and cross checked by somebody?

Comment: NIMBYs suck farts off dead chickens in August (Score 1) 250

NIMBY's suck farts off dead chickens in August. And if you've ever smelt a rotting chicken in the August heat, you know how revolting that is.

The job of a NIMBY is to do whatever they can to obstruct progress. Whether they do it to "protect property values", "save the children", or "stand up for our (religious) rights", they all do the same thing in the end: Say "No" without providing any options.

Every nation in this world is full of conquered peoples. There are more "sacred places" than you can shake a stick at, and I challenge you to pick a direction and walk twenty miles without running into someone's "sacred" place. Yet when is the last time you ever saw them worshipping there?

Yeah. Right.


Comment: Re:RTFA (Score 1) 214

Any search of how to filter out the "via" proxy on Gmail yields the same thing, it can't be done, which is something that I have scanned for first hand. At least this guy is offering a solution. Your contributions by comparison only smack of petty jealousy. Perhaps you should be the one growing up.

Comment: Job Diva is the worst........also lay off Detroit (Score 2) 214

Job Diva is the WORST of all. Hell they don't even hide that they use a harvester. Just Google them and there are numerous tales of their horrific nonstop spam. I get Detroit (which is a fine city IMHO), Fort Wayne, Billings and every other place I'd never move. Bravo to these guys for finally doing something, I'm signing up now.

The first rule of intelligent tinkering is to save all the parts. -- Paul Erlich