That's at max charge/discharge rates.

Discharging a 70kWh battery pack by 70% at 5kW (the p90 of the power draw of my house) is 0.1C.

EV-class batteries used in residential solar systems with discharge at up to 1C and charging at 0.5C have warranties covering 3500+ cycles.

The price difference between peak and off-peak on PG&Es EV-A rate plan is at least 20c/kWh (partial peak) and up to 31c/kWh, for EV-B it's between 11c to 31c/kWh (at least in summer).

"nobody is going to want to use their expensive to replace EV battery in this way."

Surely that would depend on the rates offered?

If time-of-use rates were updated accurately reflect energy costs, it might become advantageous to do this (and fund battery replacements from grid credits).

Alternatively, in countries where feed-in tariffs are much lower than consumption tariffs, use the V2G to power the house and lower the electricity bill, reducing demand on the grid.

The summary says:

"Current time-of-use rates encourage consumers to switch electricity use to nighttime whenever possible, like running the dishwasher and charging EVs. This rate structure reflects the time before significant solar and wind power supplies when demand threatened to exceed supply during the day, especially late afternoons in the summer. Today, California has excess electricity during late mornings and early afternoons, thanks mainly to its solar capacity."

This is non-sensical.

The whole point of time-of-use rates is to encourage energy use when it is most abundant.

If the time-of-use rates were updated to reflect the times when excess energy is available, this "problem" would simply disappear, as EVs set to charge at the lowest price would do the right thing.

Someone here isn't thinking, but I'm not sure if it's the author or whoever sets the time-of-use rates.

This is not the case in South Africa, where SARS is one of the most well-funded Government entities.

So even if they managers completely understand the pitfalls of this approach, they have to make the thing work until their next system upgrade grant comes along. This is why they adopt this interim solution. It's not *always* ignorance of technology. On the other hand, your comment betrays an ignorance of logistics and economics.

I think in this case, it *is* ignorance. If you don't agree, watch this interview with a previous head of IT at SARS (had been there for over a year at the time of the interview). You may want to start here and watch about 5 minutes, from where she talks about the migration off of Flash to where she says their "level of functionality is an uptime of 99.6%".

No, if you can't file online, you would have to complete submission on paper forms. Paper-based filing has an earlier deadline, so if you only realise when trying to file online, you would have to also pay a penalty. Also, South Africa's public services aren't very well run, so filing on paper will probably require spending 2 days waiting to be served at a SARS office.

> As SARS tweeted on January 12, the agency was impacted by the time-bomb mechanism, and starting that day, the agency was unable to receive any tax filings via its web portal, where the upload forms were designed as Flash widgets.

The actual tweet says "SARS is aware of certain forms not loading correctly due to Adobe Flash.".

It doesn't say that all tax filing is affected.

Actually, October 2020 was the first time I haven't needed Flash to submit my personal taxes to SARS. For the past few years I have had to use Chrome, and in 2019 also jump through some hoops in Chrome to enable Flash, to submit my personal tax information, but this year I could just use Firefox.

There are other tax types that are impacted, but not all tax filing is impacted.

There isn't really any proof that Waymo vehicles are driverless, only that the driver isn't in the vehicle. If you compare a dozen dubiously driverless vehicles to a million collecting data every moment and already doing a pretty good job at autonomy, which do you think will succeed?

The fact that the driver is not in the vehicle does not mean that there is no driver.

Not the government, but the courts:

'Rights like the freedom of speech "can be interfered with, but by law and within the framework defined by the legislature -- not according to a corporate decision."'

I believe that this was figured out in the amateur observer community before NASA confirmed it. I saw it go by in my twitter feed. Not sure I can find it now...

As someone living in the southern hemisphere (South Africa) who has regular (multiple times per week) meetings/conference calls with people in the U.S., DST is irritating enough as-is (with meetings scheduled to be at convenient times for 3 time zones, two of which are in the northern hemisphere and use DST and the other which doesn't use DST), where meetings move by an hour twice a year for participants living in a different timezone than the meeting organiser.

This 10-minute change every month obviously hasn't considered the impact on such meetings, which would drift by 20 minutes every month.

Linear Energy Transfer

It's not radioactive. When high-energy particles strike it, they break apart into lower-energy particles that are more harmful. So, you need enough shielding to catch the particles that break apart in the top layer of your shielding.

While radiation mostly results in transient errors, it can also cause latch-ups that blow a gate off of the die. For rad-hard equipment in space this is mitigated by silicon-on-insulator fabrication, so that you can't have a latch-up between the substrate and a silicon feature.

We could have REAL ZOMBIES! YEAH!

:-)

I hear you. Going to be an interesting future, if we live.