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You can relatively easily install solar panels/batteries, and they even pay for themselves while we await doomsday.

Can anyone tell if this architecture makes sense to ship in their actual cars to replace whatever is doing the computation there now? That is the only way I can see this making any…

I'm not sure if this is the point you're trying to make or if you're implying private companies aren't up to it, but... the other launcher of the same class, which will probably be…

That video uses a pretty strange calculation to estimate the battery weight. Here is a different way: 500 mile range * 2 kWh/mile means they need a 1000 kWh pack. The most recent p…

You are right to be confused about that claim, but it because the units of the claim have been mixed up. The actual claim is 2 kWh/mile. That is a measure of energy per distance, k…

I ran into the case of needing to back up a write-heavy database without blocking anything, and came up with a solution: Writing a VFS ( https://www.sqlite.org/vfs.html ) that make…

My house is set up like you describe. The whole solar/battery system never interconnects with the grid, and is instead set up like a generator. There is a transfer switch to choose…

For pressure vessels like rockets, the mass of the structure and the mass of the fuel scale together as far as square-cube reasoning goes. The surface area of the structure scales …

Here is a graph of Texas's generation by source during that time and the surrounding time. It seems borderline dishonest to have an article about this topic not include this. The s…

Just to clarify: this is about insurance for the payload , not the booster. So, the insurance costs only depend on how likely the insurance company thinks it is for the satellite t…

I bet the Massachusetts one you are thinking of is Ambri, which is making a liquid metal battery. https://ambri.com/

If you expected most billionaires to get into rocketry, you would expect there to be hundreds or thousands of rocket companies given the more than 2000 billionaires around.

I couldn't find the quote in your citation 1 so I looked it up.x "...we're closely following the terrible events unfolding in Charolottesville, Virginia. We condemn in the stronges…

Didn't we see the shoe on the other foot, roughly, in 2016 with the Russia collusion thing?

The latest we have is that it will sweat only where the heat shield can't hold up on its own: https://twitter.com/elonmusk/status/1107380559834046465 .

In the US, Telsa no longer receives any federal tax credit as of January 2020. A few states (including California) still have incentives. In any case, losing the tax credit doesn't…

Imagine cutting a cylinder in half from top to bottom, then taping the halves back together. As you spin it, the tape has to stop the two halves from flying apart. If you make the …

Page 9 of https://www.tesla.com/ns_videos/2019-tesla-impact-report.pdf has a chart for that (Average Lifecycle Emissions in New York State (gCO2e/mi)). Electric: 54 in manufacturin…

I charge through a ~40 foot long 120V "extension cord" made of 10 gauge wire and plugged into an appropriately rated outlet. Which is to say, you probably could charge in your gara…

I see. For a regular gas car, the 4 miles per kWh is wildly optimistic -- 134 miles per gallon. The kWh per mile (just from tank to wheels) would be something like 4 times higher t…

Where does your estimate of 50 kWh per day come from? According to [1], Tesla's 2017 manufacturing and delivery released 186000 metric tons of CO2, most of that "indirect" (as in a…

Sorry, you have to append a period to a URL to make it work. HN does not believe in URLs that end in periods, apparently.

It looks like an iron-based chemistry: http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=... .

You are comparing - Case A: Donald Trump runs his companies starting at year X and meanwhile leads a lavish lifestyle, ending up with N1 dollars. - Case B: Donald Trump puts all hi…

> He could have been vastly more wealthy today by doing nothing other than invest in index funds, which to me counts as largely unsuccessful. Isn't that unknowable without knowing …