Endless Sphere

Nuclear is an answer, but it might not be the best answer. One of the upshots of a tightly regulated nuclear industry is that you know exactly where the material is at all times (within reason). Your typical fleet of Filipino seamen will be the cheap part of the crew now that a nuclear engineer nee...

He ackknowledges that the ice core records of CO2/Temp have repeated correlation but with a time lag....CO2 increase lagging Temp rise by 800 yrs or so, ..but omits to point out that it also shows repeated events of temperature decreasing whilst CO2 remains at elevated levels. Of course. Many thing...

General_Lee wrote: ↑

Apr 26, 2018 8:34 am

This is bad for the devices plugged on it?

For some devices, yes. It depends on how they are designed. It's very bad for any motor based appliance (refrigerators, pumps.)

Current and forseeable battery systems cannot provide the energy density required for that either. I have no problem forseeing the sort of battery system (combined with solar and/or wind) that could provide that energy - but it's 30-40 years out at current rates of energy density and cost improveme...

The Stromer ST5: First look at the $10,000 ‘Tesla of ebikes’ : $10,000? Posers! Why, right now you can plunk down $14,000 for a 1500W Optibike. How embarrassing it must be to spend $10K on a bike, thinking you have bragging rights, only to have your neighbor buy one that's much more expensive. http...

Yes the leaf cells had a Problem with high temperatures. This particular Leaf was in coastal San Diego, an area known for its moderate temperatures. One or a few bad examples are no proof that the Claim is wrong. A PV modul lasts 30 years+, but there have been moduls around that got defective after...

19%? You really believe that? Yes, since it's backed up both by the physics of internal combustion engines and actual data from car fleets. I have never experienced such a drop in 40 years of winter driving up here. Hmm. I did in NY; I drove to Boston a lot and I definitely noticed a difference in ...

A NMC 333 automotive quality cell should last around 15 years and 5.000 cycles. Yes, it should. My first EV was a 2012 Leaf. Its NMC battery lasted 7 years before its range got so bad that it was unusable (<40 miles.) That's a loss of over 50% in 7 years. So yes, NMC batteries SHOULD last a long ti...

You pay for the electricity to fully recharge the battery that should give 300 km of range, but if it's too cold outside, you will only get 170 km range (as an example) for the the amount of power you put in? But it's ok because you only need a range of 100 km for your commute or you can just pay f...

I now have on board charger on my bike and still have external port for my original charger. Has anyone ever used both chargers at once and is it safe? I have 2- 6amp 48 volt (58.4v) lifepo4 chargers 25ah battery. It's relatively safe. Cautions: -Do not exceed the C rate for your battery. You are a...

I've had reasonable success with a this cheap DC-DC converter on my setup. . . . .It might not be the 'most' efficient, but certainly gets the job done at a reasonable cost, size and weight. They can work, however: 1) You need an additional circuit to prevent input voltage collapse, which happens w...

Then I think in about 25 years time we will have a fair amount of electric flying cars. Because flying takes A LOT of energy (god help us if we need to fight over that), so I imagine the future house-hold with flying cars being something around the order of "the 10MWh per day family" . Maybe. Flyin...

Cephalotus wrote: ↑

Apr 23, 2018 7:38 pm

A modern battery cell will last 2.000 to 5.000 full cycles.

Li-ion batteries last 500 full cycles, 1000 if you baby them.

Hillhater wrote: ↑

Apr 23, 2018 7:57 pm

The only proven " greenhouse" effect of CO2 that i am aware of is its ability to dramatically increasing plant growth when used to raise the CO2 levels in commercial greenhouses

Ah. So you don't understand basic physics. No wonder you deny climate change.

I really don't grasp the obsession people seem to have with charging rates. It comes up even more frequently than absolute range in conversation. If you have a range that's >3x your 99th percentile requirements and it's at full SOC every morning, who cares how long it takes to charge? No one. But i...

(A) .. there is no scientific proof of its effect ....All we have is theorys and predicdictions There is scientific proof that CO2 is a greenhouse gas. Fact. If you want proof, refer to the two proofs I posted above. The Youtube one is so simple and visual that even the most fervent anti-science ty...

Most MPPT controllers are made for stationary panels and have a really slow response to changes. This might be a problem for a moving bike. Maybe there's a way to speed up the response? You generally don't have to. The MPPT controller does most of its work when the temperature changes; that changes...

Yeah we all know batteries are affected by cold but I still don't get this either, how can loosing close to half your range because you drive in cold climates be acceptable to so many people? Because - 1) When you need 100 miles of range max, losing half of a 300 mile range is no big deal 2) When t...

I was told from someone who claimed to have knowledge on that, that Tesla is very frequently replacing the MID-DC connectors in its Supercharger stations over here because they have thermal problems. Hmm. We haven't had to replace a single SC connector yet here - but Blink has had to replace all it...

You are all missing the point. Shure there are many facinating properties of our atmoshpheric gas's, IR adsorbtion being one (but what about re-radiation ?) So now you admit that CO2 is a greenhouse gas - but you don't understand re-radiation of absorbed longwave IR? For God's sakes, read a science...

So all the radio-active sludge by-product created via the processing of ore for rare earth elements being used in new Model 3 make no difference to the masses who buy these cars thinking they are helping the world, its no different than the Australians who viciously attack a new coal-mine being ope...

In Germany battery systems from BYD, LG or Sonnen (for example) are cheaper (and most likely better) than a Powerwall II. Interesting. Here in the US they are much cheaper than their local competitors - Tesla PWII: $437/kwhr BattleBorn - $741 LG RESU10 - $735 Iron Edison - $1225 SimpliPhi - $956 So...

Alan B wrote: ↑

Apr 21, 2018 11:16 am

With the resulting fire hazard we cannot tolerate dead cells in a pack.

Why? Once the fusible link is blown and the cell is at zero volts, why is there a fire hazard?

... His was a "calculation". ( or Theory in other words) not even using his own data , and not from experimental work. And if you are so well informed, you should also know that his calculation (theory) has been criticised by many for its lack of rigor and omission of such factors as cloud influenc...

I don't think the data backs up that statement. Tesla now has the cheapest to manufacture battery in the EV world. What data do you have to substantiate that statement.? Cost of the Powerwall. It has the lowest $/kwhr of any lithium based home power storage system. (And uses the same technology/ass...