Came here to mention this. I've had a lot of fun putting up stealth repeaters in trees to build out the Meshcore network. One or two nodes in critical places can light up dozens of square miles for the mesh.
Find your local Discord and get rolling. In the Bay Area it's baymc.org.
> This method achieved an energy conversion efficiency of about 130%, exceeding the traditional 100% limit
I am extraordinarily confident that it did not.
> In practical terms, this means about 1.3 molybdenum-based metal complexes were activated for every photon absorbed, surpassing the conventional limit and demonstrating that more energy carriers were generated than incoming photons.
... Which is not the same thing as a >100% energy conversion efficiency (which would imply an infinite-energy-generating pump)
The theoretical maximum efficiency for solar panels is ~33% total energy conversion. So I assume what they mean here is that they achieved 130% of 33% =~43% total energy conversion, which doesn't break any laws of physics.
That said, I read the article and it's very unclear. They talk about 130% quantum efficiency but I have no idea what that might mean.
The infrastructure in question is DC fast chargers. Yes, you can charge at home if you have a house, with a parking space reachable with an EVSE, and your commute is short enough that you can fully recharge by the next commute, and nobody needs the car after hours when you'd otherwise be charging it, and you never take road trips or longer-than-usual drives.
Everyone else is, to a greater or lesser extent, at the mercy of the DCFC infrastructure, and it is sorely lacking in many places - even ones you'd expect it to be pretty good.
Your picture is not an accurate picture of what it's like for most people - you frame the exceptions as if it's the normal case.
Most people who have a driveway or garage where they can install an EVSE (or an apartment complex where the parking has chargers) don't even need to charge every day. Depending on the commute it could even be just two or three times a week. It would usually only be when your only option is trickle charging out of a standard wall outlet that you are in the 'might not be able to charge in time for the next drive' territory, not with EVSE where you can get 7 kW single phase or 11 kW three-phase with most cars (some cars can do up to 22 kW with three phase but that's rare for them to support that on AC charging and it would be rare to have an EVSE that could do that power at home).
I'm not making any representation of how common this is - just saying that unless all those conditions apply to you, you will eventually have cause to care about the quality, availability, and reliability of public DC charging infrastructure.
Anecdotally, I have 5+ friends with EVs, and every single one of them charges theirs from a standard 15A wall outlet. (I have an EV, but I also have a real charger.) Sure, most of the time it's fine - but when it's not, then you have to really care about whether that nearby EVgo pedestal is working today.
But furthermore: most apartment dwellers, many renters, people in multifamily homes/complexes where their parking spaces are not near their personally-metered power, those who have to street park - many more people than you may think have difficulty charging at home. I wish it weren't the case, and I'd love to see better solutions here.
A 2kW socket for ten hours over night will give you a hundred kilometers of range or so. A regular 11kW wall box can fully charge your car over night. How long is the typical commute you're thinking about? Fast charging is pretty much irrelevant day-to-day for people who can plug in at home or at work. The only time these people need fast chargers is during road trips.
I'm in the privileged position that I have solar panels and can charge in the garage. I only just had a conversation with someone who was considering an EV, but their 'housing configuration' doesn't support it, it just wasn't feasible purely from a charging perspective in their situation.
More public infrastructure, and knowledge of the presence of said infrastructure would open up EVs to a wider set of use cases. It's almost the 'confidence' in the suitability of EVs that needs to be worked on.
This is absolutely true, but IMO also a much smaller problem than some people are making it out to be.
Without any special car-charging equipment, just with a regular outlet, I'm able to get over 100 miles of range every night (charging only from 11pm to 7am).
This is enough for a pretty long daily commute and it doesn't block car use during normal hours.
Big disclaimer - I'm from Europe, which helps my case because of shorter commutes and faster home charging with 220 volts.
But at the end of the day I think the solution lies in equipping all parking spaces at home and at work with power outlets. DCFC is definitely needed, but should be viewed as a solution for exceptional cases (i.e. roadtrip that exceeds your range), not a gas station for EVs.
It’s hilarious that the greenies who live in dense urban areas have a harder time charging their EV than folks who live in the burbs. I’m thinking of putting in a second EV charger so I can charge two cars at once.
The lesser-known instance of this is RV power. When you're running off small batteries and solar, you want to make the best use of the watt-hours you have, and that means avoiding the DC-to-AC-to-DC loop wherever possible. So you run 12V (or in newer models, higher voltage) versions of everything, upconverting as necessary.
I am really skeptical that 12VDC power distribution in RVs actually saves power compared to a high-quality (hah!) higher voltage AC or DC system. 12V is absurdly low and you can’t easily lose quite a few percent in resistive losses even with fairly large cables, and those large cables are quite unpleasant to work with and rather dangerous.
The vast majority of what you're running from RV DC are things like lights, fans, phone chargers, and other cigarette-plug-adapter type devices. My RV has a 12V DC fridge. For anything more - particularly air conditioning - you need AC for sure.
My inverter-charger is connected to my batteries with 4/0 cable. That wasn't fun to run.
You might be surprised. Various games have come with both. One iteration (the 3DS remake of Gold/Silver) even came with a pedometer that allowed you to level up by walking around: https://bulbapedia.bulbagarden.net/wiki/Pok%C3%A9walker
Philips Hue, and Zigbee direct-binding in general, can achieve this if you're willing to use their wall switches. Still works if the hub is offline.
Depends on your definition of "regular switches," I suppose -- but anyone with 3-way wiring (i.e. multiple light switches for a single socket) has given up on "up=on" for their switch.
I have almost everything in my house HA-automated, but anything touching the water supply is all on dumb physical valves and electrical timers. If my light switches don't work, that's annoying. If a robot vacuum doesn't run, that's frustrating. If a water valve is stuck open, that's catastrophic.
A RAM chip takes several months to make, starting from an empty silicon wafer. Each chip takes 8-10 weeks to go through the process of lithography, deposition, etching, cleaning, etc. It then must be tested, which can take another couple of weeks, then packaged, before it can be sold to manufacturers. Thus, even if fab capacity were available today (it isn't), you'd still see a multi-month lag before new supply hit the market.
(This is an extraordinarily sensitive process, and disrupting it can cause you to lose the entire batch. You might have heard of cases where "wafer starts" had to be discarded due to a tsunami or power disruption - this is why.)
The actual reasons are monopolies, tariffs and sanctions - the unstable trade environment coupled with monopoly lobbying keep the market uncertain and unattractive for new players, at the same time, the old monopolies don't have any reason to invest in new production - their profits grow when the price on the strangled market keeps going up while they keep doing nothing at all.
Find your local Discord and get rolling. In the Bay Area it's baymc.org.
reply