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eDoc2020
JerryRigEverything
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Comments by "eDoc2020" (@eDoc2020) on "JerryRigEverything" channel.

@safffff1000 I watched another video about the Aptera a few months ago (maybe Rich Rebuilds) and IIRC in crash testing it beat all production vehicles. It turns out "organic" shapes are super strong. Besides that, SUVs and pick up trucks don't do too well in crashes, and more importantly they're easier to crash than regular cars. The reason there are so many of them is because they are excluded from many safety and emissions regulations.
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@israelgaribay9216 You want the passenger compartment to be as rigid as possible. I remember hearing the Aptera was exceptionally safe in crashes, they must have crumple zones figured out.
8
Rather than hardwiring it I'd install a generator-style inlet panel. It can either connect to a matching outlet on the house or to a portable generator if ever needed.
8
@joelimbergamo639 Most commercially available hydrogen gas is "blue" hydrogen, being a byproduct of fossil fuel production. "Green" hydrogen created from electrolysis is more expensive. The big downside of green hydrogen is once you take electricity, use it to produce hydrogen, and use a fuel cell to get electricity back out you have lost most of the energy. Batteries are just much more efficient.
6
@zack9912000 R32 is not highly flammable, it's classified as mildly flammable. It can occasionally burn in the presence of a flame but it won't explode. And fun fact: the mixed refrigerant R410A is 50% R32. If you have 410A you already have R32. It's nothing new.
5
I'm pretty sure the whining is due to the inverter. Actually the noise itself probably comes from the motor but it's because of the inverter switching. Other electric vehicles definitely make the same noise.
3
@gastiresoil9758 I believe Quebec has very cheap hydroelectricity and thus usually uses all electric appliances. Fortunately modern cold-climate heat pumps are now becoming more common but even they aren't magic. 3kW continuous, assuming an average COP of 2, is around 20,000Btu/hr of heat.
3
R32 is a bit cheaper than R410A and is compatible with many existing 410A systems. Since Daikin is a promoter of R32 I'm sure Zack's unit is dual-rated for both refrigerants.
3
@Stepclimb First of all his name isn't Jerry. I doubt Zack is making mistakes in order to boost engagement via Cunningham's law. I think calling the multimeter a voltmeter was an honest mistake (after all most of the time it is used as a voltmeter), and I think it's fine to refer to the low voltage system as 12 volts. That's the nominal voltage, literally meaning that's what it's called. While it is usually greater than 12 volts it can also be less than 12 volts. It depends on the battery's state of charge.
3
@Tkaya460 Compared to furnace+AC it's not much more install cost. If the heat pump is consistently more expensive to operate at any temperature then use the furnace for 100% of your heating and leave the HP for cooling only. If utility rates change you can start using the HP when it's warmer out. Or if the furnace has a malfunction you can use the HP to stay warm. If you live somewhere where electricity is 10x more (as you claim) and it never gets hot then sure, go with a heating-only furnace.
3
Apparently snowmobiles are huge energy hogs. Other commenters have said gas models get much fewer miles per gallon than heavy gas trucks.
2
All the components like the motor inverter will have capacitors on the input. As it's a three-phase output the current input will be very smooth so there will be minimal benefit to having super-oversized capacitors.
2
@jimmyc1518 The Note 7 issues were because they made the cells without enough safety margin between layers in order to get the absolute most capacity possible in the smallest possible size. In cars nobody cares if the battery is two mm thicker so even if they used the exact same battery chemistry (and they don't) it would still be safer. Plenty of smaller brand EVs use LiFePO4 cells which are much more stable than the NMC used in brands like Tesla which itself is decently safer in operation than LCO normally used in smartphones. And if you think charging electric passenger cars charging will break the grid, please consider that most charging occurs at night when overall grid utilization is lowest. And if you need to wait in line to charge, you should get a way to charge at home. If fast charging takes 20 times as long as filling a fuel tank but people only need to use charging stations 5% of the time then the waiting would be equal to current gas stations assuming an equal number of charging stations. One of the largest practical barriers to EV adoption is that many people don't have their own dedicated parking spaces at home where they could charge.
2
For off-grid (including grid failures) I believe almost all "Powerwalls" support frequency shifting which lets them safely charge directly from any AC-coupled generator. The main downside of this is that some AC-powered clocks will run fast.
2
Positive 60F is positive 15C. Negative 60F is negative 15C.
2
I would imagine they use virgin glass for fiber optics because they need a high degree of purity.
2
It's LiFePO4 so it should last a long time, 10,000 cycles is normal for this chemistry. They mentioned a 10 year warranty so clearly the manufacturer expects it to last more than a decade. Also keep in mind it should keep working even after "end of life", just with reduced capacity.
2
When the car isn't active the entire HV system is disconnected for safety and efficiency. The 12v battery keeps everything working in the meantime. One of its main jobs is starting up the circuitry which enables the HV circuitry. Once the car is running the DC-DC converter supplies all the 12v current so the battery isn't being used. However the battery is still helpful at this point. It helps the converter deal with sudden changes in load and also is a backup in case the converter fails.
2
I believe most switches are "break before make" as you seem to be looking for. Make before break (both sides on during the transition) is less common.
2
It's obviously a gimmick but it does indicate you'll still get good acceleration when towing.
2
If you add weights to the front wheel it should also greatly improve the traction performance.
2
There are. There's one in North America and another in Europe. While Tesla has a different plug it's basically the same, a tiny adapter provides all the conversion needed.
2
@seanplace8192 What makes you think the feeder is 8AWG? Ground and neutral was connected in the subpanel so it was originally installed decades before modern color-coded Romex. Btw 40 amps is only the maximum for 8AWG when 60 degree parts are used. If 75 degree parts are used it would be rated 50 amps. But regardless of the feeder, I agree the EVSE still needs to be reconfigured for 24 amps max because of the 10awg wire and 30 amp breaker.
2
I think a much more practical solution would be a charging dock with wired contacts mounted on both ends.
2
I think this person was using something like 100kWh/day. If they're somewhere with a cheap 10cent/kwH that's $300/mo which is something like 12 years to break even with no incentives. If they move out before then the setup will increase their house's sale value.
2
Practical blue LEDs (required for white LEDs) were basically invented in 1993. It wasn't until the 2000s that LEDs started to become remotely affordable for general illumination.
2
@orppranator5230 We have similar inspections in the US state of Massachusetts and it only costs $35 per year.
2
First of all, AC units do often leak refrigerant. Cars leak much faster because the compressors are mechanically run and it's impossible to make a perfect seal around a rotating shaft. Electric compressors are fully hermetically sealed.
2
AFAIK most electric hot tubs are a maximum of 40-50 amps. That's 10-12.5kw. So you'd probably want another power module if you were crazy enough to run an electric hot tub on battery. If you have a gas (or other fuel) powered hot tub then it's no problem to run the pumps on battery.
2
@Stepclimb There wasn't any doubt about who you were talking about, I just like to correct misinformation. I'm not sure where I heard it originally but that's what he's called. I just looked and his website says his name is Zack Nelson; I didn't know the last name before this. People often think his name is Jerry because of the channel name. Regarding vehicle electrical systems, I'm well aware that 6S PbA batteries are usually above 12 volts. If I'm not mistaken 12v is about 50% SoC but it's best to keep them fully charged. If I find a spare battery below 12.6 volts I'll get it to the charger right away. But I still maintain that the nominal voltage is 12v. The Cambridge English Dictionary defines nominal as "in name or thought but not in fact or not as things really are". We already agree that 12v is "not as things really are" so let's focus on the first part. Every 6S PbA battery I've ever come across is labelled as 12V, accessory sockets are usually labelled 12V, and most equipment is labelled 12V unless a specific range is given. When (most) people speak they say 12V. If it's not 12V "in name or thought" I don't know what it is. AFAIK the only place people usually say 14V or 28V is on aircraft. While a Humvee can be dropped from an aircraft it is not an aircraft by itself.
2
@gundalfthelost1624 Walking requires more physical effort than biking, meaning you require more food to to travel the same distance. The cost of food would likely be more than the cost of bicycle maintenance.
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@percussorhd Unfortunately we don't reuse the bottles where I live in the US. The collecting machines used to get back the bottle deposit just smash whatever you put in.
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@CNC-Time-Lapse In an analog world interlaced video is better, you get double the temporal resolution with no increase in bandwidth. Interlaced only sucks when you start doing digital processing.
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@TheLoneWolfling R410A is a mixed refrigerant and 50% of the mix is R32. The equipment that was using 410A 20 years ago is already using R32. Full R32 behaves about 10% differently so it's not a big change. It's not like R22->R410a which was a much more significant change.
2
It's not new in the US. It started being used in the 90s and became the norm around 2010. Our late transition away from 410A should be complete in the next year or two.
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I believe the module at the top of the stack (with the display) houses the inverter.
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@chris101ward It's definitely not a swamp cooler, that's requires evaporation in the room which is impossible with a sealed A coil.
2
@Skrenja I agree that battery capacity would be an issue for many potential users but what makes you think EVs are not easy to repair? I'm genuinely curious. I can think of reduced parts availability due to smaller sales volumes, mechanics being unfamiliar around EVs, and also one well-known manufacturer being a d**k about repair. Since EVs are so much simpler I would expect them to be easier to repair than ICE vehicles in an apples-to-apples comparison.
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The average home in the US is much larger than an average apartment. If you're in an apartment you are also sharing walls which massively reduces the air conditioning need compared to a standalone house.
2
Yes and no. You would still be limited to the selected circuits but with adjacent panels it should not be difficult to move more circuits over if desired.
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That's for the entire setup. Even the most expensive panels are under $500 each.
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@UCMENOTx OP says they are in Texas which is famous both for needing air conditioning and for having subpar insulation.
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@sepez In America we (apparently) use kcmil (thousands of circular mils, also called MCM) for wires larger than 0000 AWG. 1 kcmil is 1000 times the area of a circle with a diameter of one thousandth of an inch. Other parts of the world use square millimeters which just makes calculations so much easier. For example a 2.5mm2 wire can carry 2.5 times as much current as a 1.5mm2 wire. No need to look at a table to figure that out.
2
Burning fuel at a commercial power plant and using it to charge an electric car is more efficient than an ICE car burning fuel directly. If the electric mix is cleaner than that's even better. Some battery types are less intensive to make than others. I'm a fan of LiFePO4 batteries. Compared to more conventional lithium ion batteries they don't contain cobalt and also last much longer.
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@Lapatt_Blue From an emissions standpoint centralized burning of fossil fuel is still better than burning in individual vehicles because it's easier to manage. And solar panels can provide enough energy if I'm not mistaken. A local solar installer put panels on its lot and was able to power its electric cars and still have plenty of energy left to give to other nearby businesses. For something less anecdotal, read on. Americans drive a total of around 3.2 trillion miles a year. The "average" EV consumes 201 Wh/km. This would mean America would need about a quadrillion Wh per year to power cars if everyone went electric. That's a lot. Where I live in Massachusetts (which being in the North gets less sun than average) we get over 4 sun hours per day, or about 1500 sun hours per year. An average solar panel is rated 300 watts, so at this insolation would produce 450 kWh/year. This would mean we need about 2.2 billion solar panels. There are about 140 million American homes so that's 16 panels per home, which isn't too excessive. If you place panels on businesses, highway exits, etc it's certainly doable. And nuclear is still an option. Even including Chernobyl it has a better safety track record than coal plants and we're not going to build another RBMK like Chernobyl. Even existing American plants which are based on antiquated designs are an order of magnitude safer than that, and next-generation designs are much better still. You're left with nuclear waste, but is that really bad? Everything in it was already in the crust, it's only hazardous because it's concentrated.
1
@Lapatt_Blue If everybody has electric cars they already have massive battery banks at home. The manufacturing is the main problem with the sustainability. Using clean electricity to bootstrap the production processes of other clean energy components would help, but the question is is that enough? Most of an electric car is easily recyclable, but how good will battery recycling become? I see EVs and clean electricity generation as two separate but related problems. They can be addressed separately from each other.
1
He had 400 pounds just in tires on that trailer, in addition to the engine, transmission, and other bits. Please let me know what minivan model can tow 6000 pounds, I might want to get one.
1
Zack, I have an idea for how you can handle the eject button. Make the radio spit out its CD. I guess you'd need to add a radio first, I'm not sure if you were planning on doing that or not.
1
That's the problem with new electric cars, and for that matter also tons of new ICE cars. The Mitsubuishi i-MiEV looks like it was a nice little car, but unfortunately it's been discontinued.
1
It's about 35 panels if you live in the northern US and don't invest much in energy efficiency.
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@CobblerEx 410A is indeed being phased out here in the states. The market was supposed to shift to other refrigerants this year but they've obviously been delayed. The main holdup is building codes not being updates to allow slightly flammable refrigerants.
1
@james2042 It depends on utility rates and the particular house. I'm guessing their neighbor has a ducted system which is less efficient than mini-splits.
1
It converts from one DC voltage to another.
1
I don't think people are scared of leaking furnaces. The only reason we're okay with stoves is that they burn much less gas and are usually supervised.
1
It varies by jurisdiction. Where I live in Massachusetts we have a similar deposit system on some containers (I believe mostly carbonated beverages) and when we return them to the store we get refunded. A few other states use this system but most do not. I don't know if other states use any different incentive programs.
1
To go from 0% to 100% on a common 240v 32a charger the 200kWh battery would need 26 hours to fully charge. At $.20/kWh (AFAIK above the national average) this would cost $40. That is a lot of money but surely much less than an equivalent tank of gasoline.
1
On the other hand you are directly affected by your own home electrical work. You'd probably read up on all the rules and double/triple check everything as you go along. Meanwhile a professional can grow complacent and make hasty mistakes, or just do it good enough. As countless others have pointed out mistakes were made in Zack's installation.
1
@TheSpotify95 In terms of labor it's much more cost effective for a business to replace lots of lamps at once.
1
I think it will be easier to hotwire than to make a key from the video.
1
@matjazwalland903 Capacitors large enough to make that much of a difference are crazy expensive. That's the biggest reason. Plus to do as you describe you'd need additional high-power converters to decouple the capacitor and battery voltage and that will just add inefficiencies. On top of that batteries in EVs (especially plug-in hybrids) are designed to handle high current. Unless you have something like a first-gen Leaf which lacks a battery cooling system it's a complete non-issue.
1
A standard American wall has wooden studs behind the drywall every 16 inches. The batteries mount onto the studs which are at least 2x4 nominal inches, aka 38x89mm actual.
1
With the huge glaring exception of Tesla EVs aren't hard to repair.
1
@shapshooter7769 Maybe you misread what I said. I was saying non-Tesla EVs are easier to repair. But if you want someone working on a Tesla, search for "Tesla wanted him to pay $22500 to replace a battery pack, we did it for 75% less!"
1
I don't think it's as bad as you're making it out to be. He has a 30a breaker on the wire so it is protected from overheating. It will be pretty useless because the breaker will trip after a few minutes but it won't set the house on fire. And in regards to the video being dangerous to others, it's really not. Anybody ignorant enough to blindly replicate this wouldn't have a way to know that 10AWG wire is used. It was never mentioned, I presume you only came to that conclusion because of the orange jacket.
1
They don't seem noisy on video, Zack's voice is coming out a bit louder and I don't see a microphone on him. 15m is definitely enough that the noise won't be a problem.
1
If the battery is of a modular design sudden failures can be repaired for much less than the cost of an entire pack. In terms of natural aging, batteries are still quite usable at "end of life." They will just have a bit less capacity and/or power.
1
It is normal for houses to have air conditioning and a furnace. The older heat pumps didn't work below freezing so they are next to useless if half your heating load comes when it's below freezing. If you live where it never goes below freezing heat pumps / reverse cycle aircon work fine and that's why it's the norm down under.
1
@ray.upside-down Really? Laptops refusing to operate outside of the case is the stupidest thing ever. It's one thing if the programming isn't smart enough to work without a touchpad or something but purposefully disabling the system is just cruel. Do they at least give an error code?
1
I don't see why so many people are complaining about the lack of earth ground. I don't see how it makes a difference here. Can you think of a situation where it would be unsafe? What's more important than an earth ground is proper bonding, meaning the grounds of everything are connected together.
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@somecringeuwu3928 Yes, absolute gem of a comment.
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Basically all commercial hydrogen is produced using steam reforming of fossil fuels.
1
You can get a pretty accurate measurement of the charge but range is always an estimate. For a given charge the range will be much better strolling down Main Street at 35mph vs flooring it while pulling a trailer.
1
Some American homes do and that drives up the average. If you exclude HVAC the, cooking, and hot water it's probably more like 12kWh/day.
1
Each stack has a 6kW inverter, together they are 12kW.
1
What does the grid have to do with autonomous driving? ICE cars can be autonomous just like electric drivetrain cars. And things breaking is sort of paradoxial. I'm a bit afraid of autonomous cars as well even though they have a better track record than human cars. The big difference is probably that autonomous failures are probably more deterministic than human failures.
1
@billycroan2336 I wasn't watching super closely but if the conduit is only used for protection I don't think you need any junction boxes. Of course in this case the NM-B cable would need to be fully intact from end to end.
1
The lights are connected in parallel, it's just the wires themselves which are in parallel. Daisy chaining general-purpose power connections is perfectly fine. Star connections are only needed in specific applications, and even then it's usually just the ground. I don't see the point in mentioning that 10 4 amp lights would draw 40 amps. Zack (his name isn't Jerry) is only wiring two headlights. Part of engineering is knowing what the requirements are. There's no need for the lights to all be perfectly matched. If there were giving each its own cable to a common star point isn't enough, you'd also need to match the length of each wire. Where I do agree with you is that it's not great to wire all the lights on one fuse. But I don't say that because it makes it easier to identify which light failed, I say it because it reduces the chances of a single failure causing all your lights to fail at the same time when needed for safe driving.
1
I think most of the glass in the panels can be recycled, but that doesn't really matter. Unless struck by a meteorite there's little reason a panel will need to be replaced. If you want to upgrade you just pass the old panels on to somebody else.
1
For what it's worth CAN wiring should be daisy-chained with a terminator at each end. Using an (electrical) star topology could cause signal integrity issues.
1
@M4l3k0 For solar panels in particular the dependable generation means taking out a loan to pay for it is relatively low risk. If your monthly payment is $50 but it saves you $100 a month you'll be ahead right away.
1
@M4l3k0 In the US there are solar leasing companies. They'll install panels at no cost to you and for a period of time they will keep a portion of the energy produced as payment. After that the system is paid off and you get all the electricity for free. This model seems to be the most popular in the US. Is there nobody doing this in the UK?
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@M4l3k0 It's the old paradox, where in order to save money you need more money.
1
Where are those temperatures coming from? Modern heat pumps usually maintain a COP of 2 down to 5F outdoor temperature. If you need heat strips it's because you need more heating.
1
I suspect the video was recorded out of order, so the picture shown before was after the wire was installed. At the end of the video we see the new charger is connected to the middle section of the tandem breakers.
1
I'm sure he'll never do that. Hydrogen fuel cells are limited in power output meaning they are useless for acceleration. They need to be combined with batteries or similar tech to come close to practical.
1
That's the best part, you don't need to replace them. Unless there's a catastrophic failure they just keep working at reduced capacity.
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@Tkozuh Panels are surprisingly strong, they're made to withstand hail. It's normal for panels to survive while everyone else's asphalt roof is ruined. If a panel does break within 25 years it's probably covered by warranty. If not, a single panel is $150-400 and easy to swap out.
1
@Tkozuh If hail is regularly going through everybody's car windshield then solar panels are probably a poor choice of economic investment for you. Standard panels are only made to withstand direct hits from golf ball sized hail. If you just want to play around with the technology you can throw together a basic usable off-grid system for under $500. That's less than the latest smartphone or gaming console.
1
@Tkozuh I was talking about a mini-system. I'm sure you can get a 300W panel, charge controller, 1kWh battery, and cheap inverter for around that much. It won't run a full house but it's enough for decent lighting and/or a small refrigerator. And I'm not sure where your $15k panel-only price is coming from. 7kW of panels should have no problem generating 30kWh/day on an average winter day. 20 panels * $200 each = $4000 in panels. I haven't checked recently but I don't think panels have gotten 3x as expensive in the past year or two.
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@Tkozuh The main point of the mini-system is to have fun experimenting. But it's also useful because it gives you a decent source of electricity when the grid's down. You can also take it with you if you go tailgating, glamping, etc.
1
@Tkozuh You need capital, not income. An important difference. You can have plenty of money now but might not be able to rely on future income. Or you might even use bank capital. If rates are favorable you can finance the system and have monthly payments less than the electricity savings. You'd be saving a little bit every month but then once it's paid off the electricity would be entirely free.
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@Tkozuh I can certainly agree that battery storage does not make sense for an average customer to save money.
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Cheapest energy source, not cheapest power source. The solar produces electricity at $0.00 per kWh which can't be beat. You only need to pay once for the power capacity
1
@zack9912000 Only the crappiest heat pumps shut off at 32F. Usually there's specified output down to 22F outdoor temperatures. You should still have aux heat but even in northern states you can go 90% of the year without aux heat.
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YOu mean mini-split units? They're considered unsightly and you need a head in every room. If you already have ducts a central system is easier.
1
@costafilh0 A built-in model is going to be more expensive to install. I did know that mini-splits are considerably more efficient.
1
I thought I saw MC4 cables being connected, suggesting that it is a hybrid inverter. Even if it's not, most of these battery systems support charging from microinverters during a power failure by using frequency control. Sol-Ark can additionally accept AC coupled solar via the generator input/auxiliary output.
1
Your unit sounds like an older inefficient model. How warm/cold it feels at a given temperature is dependent on the airflow and the discharge temperature. Your old one probably discharges 90F on a good day and 85F (or worse) on a cold day. A modern inverter unit will push closer to 100F and a furnace usually pushes around 120F.
1
AFAIK OBDII is only used for emissions inspections which the vehicle would be exempt from. Besides this is from 1995, a year before vehicles generally got OBDII.
1
@Dat_Sun FCEV range isn't bad and unlike BEVs you can refill extremely quickly.
1
@BenIsInSweden That other commenter is a troll. On paper R32 performs a few percent better than R410A.
1
@zack9912000 A refrigerant line that leaks over time doesn't cause an explosion, the gas will have plenty of time to dissipate before reaching the explosive level.
1
@delavega92 If the power plant is solely gas-powered you probably end up with 30-40% efficiency by the time it enters your home as electricity. Multiply that by an average COP of 3 and you end up with around 100% net efficiency. It's about even. The real benefit comes when some of the electricity comes from other sources. As the grid becomes cleaner the heat pump system becomes better but the furnace will be stuck burning gas at 96% efficiency.
1
@chrisarnone7896 Linemen need to ground out lines before working on them. If they do this and someone is backfeeding there will be a bit of an arc and then your equipment will be forced to shut off (either gracefully or by self-destructing). If you are trying to backfeed an entire town this will happen before the lineman arrives but if there is an open circuit fault near you your equipment could possibly still power you and a few neighbors.
1
Since a heat pump is 90% the same as an AC unit it should last just as long. Calendar life is less because you will run it in the winter instead of just the summer. Modern inverter units should have longer life than a conventional AC on the mechanical bits but the electronics could fail. Fortunately electronics are cheaper and easier to fix/swap than the sealed system.
1
@ddnmd I'm sure a properly maintained 4 stroke gas model doesn't smoke but some of the ones seen in the video certainly do. As for trail side repairs, wouldn't a dino fuel machine also have issues you couldn't fix on the trail? How many people on the trail carry around spare parts and a full toolkit? My gut feeling is most failures would be on parts which are separate from the engine.
1
@ddnmd My point about repairs is that all of the items you mentioned are either parts specific to the gas engine or are also present in electric ones. The are practical reasons to go with gas over electric (namely range and weight) but I don't see trailside repairability as one of them.
1
@BladeStar420 Working inside batteries is dangerous. EV batteries have built-in safety contactors and other features so the chance of electric shock is minimal. It's more likely to hurt you by crushing you.
1
Zack has dirt cheap electricity in Utah, I'm sure he'll be saving lots of money. Obviously your electric rates will go up significantly, but your existing heating system also costs money to use. I'm also in MA and by my calculations on current utility rates a heat pump should be about 30-50% more expensive than gas if you use it the entire year. Since heating oil is more expensive than gas your heat pump should be saving you money if it's properly sized and installed.
1
IMO easily recyclable recycled plastic is better than glass. When making glass, even recycled glass, you need a lot of energy to heat the material to melting and you often need much more material. Basic plastics can be remelted without much energy input.
1
"If the cost is anything similar to Tesla" -> with other brands third parties can easily service the car and you should be able to replace the battery in sections instead of needing to replace the entire car battery if a single cell goes bad.
1
@mikolajwojnicki2169 The outdoor fan is shut off during defrost. All the heating goes into the ice and it doesn't get blown away like it would during the summer.
1
I wonder what it would take to fool the facial recognition. Will a life-sized face printout work (since the cameras might only be detecting depth and thus size)? If not, how about the picture wrapped around a football or other round object?
1
That was supposed to be the case but all the split units I can find online are still 410A. I think they've pushed it off until the end of this year.
1
Of course Teslas are more expensive, they're a luxury brand. The only reason EVs are expensive is the battery. Without the battery they should actually be cheaper than ICE vehicles.
1
2kWh/day is equivalent to a constant 83 watt load. That's about what a single refrigerator uses. I could see a very efficient home using 5kWh/day.
1
@DooMMasteR My refrigerator uses about 160 watts when running, I already accounted for the partial duty cycle. The OP was talking about the days when incandescent lights were the norm so anything more efficient than a typical 1990s refrigerator is not a fair comparison.
1
@DooMMasteR I just checked the "Energy Guide" sticker on a mini-freezer from 2001 and it is rated at 321 kWh/year. I also looked at the Home Depot website and their top seller refrigerator (GNE27JYMFS) is rated 633 kWh/year. Their top-selling top-mounted freezer model (LHTNS2403S) is rated 417 kWh/year. Both these brand-new new models are Energy-Star rated. Can you please explain where your 150-250 kWh/year figure comes from?
1
@DooMMasteR 30kWh/day is a lot in absolute terms but keep in mind it's a national average which is impacted by high users. The South lives on air conditioning and electric heat. Even when electric heating is by heat pump it's a ton of energy.
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Obviously yes but don't worry about it. I'm sure any half-normal driving will keep the battery charged up.
1
The electric car's charger is not connected to the transfer switch.
1
The whole appeal of hydrogen fuel cell vehicles is that they can be refueled quickly. If you create hydrogen via electrolysis on demand you lose the speed advantage but are stuck with the large inefficiency of the electricity->hydrogen->electricity process. Batteries would make more sense.
1
Light bulb is acceptable for lamps shaped similarly to plant bulbs. Old-school A19s are bulbs but fluorescent tubes are not.
1
He already has an extra electric motor and battery on the trailer :) A somewhat practical thing to do is to put an extra battery on a trailer and parallel it with the vehicle's main battery. It requires special know-how but when done properly it just acts like one double-sized battery. I've seen a video where somebody did this with a RAV4 EV.
1
I doubt they're using 16-bit integers in their code.
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An electric motor is typically lighter than a gas engine of comparable power, especially if you consider transmissions and such. Plus EVs usually have heavy batteries under the body.
1
Do you mean they're worse at dehumidification? That is often the case by default but most can be adjusted for more moisture removal.
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I used to have (and probably still have somewhere) a translucent flexible PC keyboard. It was called "virtually indestructible" and ironically it was already broken when I bought it.
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Unfortunately I think the high-tech dashboard is pretty standard among all types of new cars.
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IMO your reasoning is wrong. Heat pumps are best when there's minimal heating needs and and gas furnaces are often better when it's regularly very cold.
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If you're talking about a version of Opera after 12 it's just Google Chrome with some tweaks. There's no reason it shouldn't work.
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I'd be very surprised if there wasn't a tree with a Tesla charger. Having said that, it's not something you'd be very likely to come across in the wild.
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No, a condensing furnace needs plastic vents. A lower efficiency furnace requires metal vents.
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I'd like to inform you that your extension cord melted because of a poor connection, NOT from the wire thickness. The length of a wire has nothing to do with how much current it can handle without overheating. Instead, thicker wire is needed over long distances because excessive voltage drop can prevent devices from functioning properly.
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Relatively little I'd guess. AFAIK the main range reduction in the cold is from running the heater. This will be insignificant compared to the range loss from pulling the non-aerodynamic trailer.
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@kierank01 It makes sense when you consider that propane is running at over 100x the pressure when used as a refrigerant.
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@zack9912000 R290 won't be in split systems but it can work great for "monobloc" systems where all the refrigerant is contained inside the outside unit. This also has the huge benefit that installers don't need to work with fiddly refrigerant lines. Instead these units transfer the heat by pumping a glycol solution to the indoor coils.
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We're almost there. You can get basic 12v 200ah LiFePO4 packs for under $500, that's only $200/kWh. Now I'm realizing that meets your price point exactly. Problem is you still need an appropriate inverter which is at least $1k on the low end. And those cheap components probably don't have all the needed approvals for a fixed installation. For a DIY "portable" system you could definitely get a complete $6k which is not terrible.
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I've never heard of a 48 amp EVSE. I've only seen 32 amp ones here in the US. I don't think many cars can charge faster than that.
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@harishvora1741 I disagree, it actually could be a nice marketable feature. About 1kW of panels fits on a car and assuming 6 hours of strong sun per day would provide enough energy for the average EV to travel around 19 miles or 30km.
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Both ducted and mini-splits are placed on the same scale. Ducted systems require large circulation fans and thus are always less efficient than an equivalent ductless unit. Also it just isn't a particularly great performing unit.
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@noahstuart3025 Hydrogen combustion engines would just put out more water than FCEVs because they consume more hydrogen.
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That's stupid. I can't imagine why they'd do that. On the practical side, nobody "ever" reads the terms of use and there's no way for them to even know what type of device is connected.
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I've heard that bleach can be used to return water-damage indicators to white. Maybe acetone does the same. Or actually, I don't think acetone bottles contain any water. The lack of water could be another reason why the indicators are still white.
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Most of the heat is coming from outside. When the unit is operating at a COP of 3 it means twice as much heat is coming from outside compared to from the compressor itself.
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@rosegold7975 And that's one reason why short-cycling is bad. If you have proper run times the startup losses do mot have a large impact.
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These were designed to ruin without doors. It's not the same as cutting the doors off a Corolla.
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There is a slight breeze and some noise. In a properly sized system you won't feel a breeze unless you're directly next to a vent. The noise level is also quite low unless the vents are overloaded.
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I'd guesstimate 5-15k for the main equipment. The extra equipment like the transfer panel and wiring is probably another grand or two and then labor/installation costs will vary greatly depending on region and contractor.
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For city driving I don't think it will be bad.
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In most of the US heat pumps are cheaper year-round. Here in Massachusetts (with expensive electricity) an air-air heat pump is currently cheaper than gas when it's more than 45F outside. Heat pump COP drops a bit in the cold but on modern units the capacity stays up until subzero. The heat pump I've been eyeing (Comfort-Aire VCD36) is rated 39kBtu/h@COP 3.18 when it's 47F and it drops to 32kBtu/h@COP 2 when it's 5F outside. That's not a massive drop. Single-speed R22 systems are much worse.
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Air conditioning and heat pumps (more common in the South) are going to be driving up the average. Also keep in mind it's 30kWh per home, meaning more like 10kWh per person.
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They should automatically defrost. If yours was freezing over it wasn't working properly.
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A Game Boy runs at around 59.7 fps.
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@zack9912000 How is that the case? With inverter mini-splits you get precise temperature control everywhere. With a central system you are stuck at one thermostat temperature and in other rooms the temperature can be different.
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If it couldn't clean the sensors it would need to rely on other sensors. Keep in mind this isn't a new problem. What would happen to human drivers if a window is dirty?
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I presume that's just the frontend system. The actual self-driving stuff probably runs on something else.
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It's stupid easy, you just need longer wires.
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Here grocery stores often have collection bins for plastic bags. While they can't go in the regular stream they are still recyclable.
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@Chrislk1986 I believe many jurisdictions banned the use of single-use plastic bags in many situations. However they defined single-use based on thickness, so the stores naturally find the cheapest way to comply.
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You just said why. Air conditioning and heat pumps (or even worse resistance heat) combined with poor insulation skew the average higher. There's also the fact that most Americans don't buy with efficiency in mind.
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Yes. If the click comes a couple of seconds after you switch it on you are hearing a speaker protection relay. A monitor circuit ensures the amplifier is working without a DC offset before the relay connects the speakers. This stops the speakers from thumping when the amp is turned on but more importantly protects the speakers from excessive current if the circuit malfunctions.
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@lisdraw4715 Short answer is maybe. There are so many amplifier circuits around it's impossible to know without looking at the details. However, most amplifiers include temperature compensation circuitry so the audio quality difference is probably small. Amplifier biasing can be a complicated subject and I'm not an expert there.
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To start with most people have refrigerators. If you have a kitchen fridge and a second garage fridge that's already close to 200 watts continuous (equivalent). Then there's stuff like cable modem/routers and TV boxes/DVRs which are probably pulling another 50W continuous combined even when not actively in use. Then things like microwave/stove clocks and other stuff drawing at least 20-30W combined in standby. That's almost 300W before you turn anything on.
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The nice thing about batteries is they slowly degrade with use instead of becoming inoperable. Once a battery reaches its "end of life" metric it should still be usable, but the range will just be 70% or so what it was when new.
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Yes, the relay circuits still need to be fused. I would just move the wires from the busbar to the always-on fusebox.
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Unlike ICEs there is little difference in EV efficiency between running at high rpm low torque or low rpm high torque. Anything more than two gear speeds on an EV is totally wasteful.
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1. EV owners typically charge piecemeal. Fully charging from empty is quite uncommon. 2. 1940s televisions produce very sharp pictures. 3. While EVs are more toxic to produce and discard than ICE vehicles, they are much less toxic during their lifespan.
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Better than recycling is reusing. In the old days (and in much of the world) we refilled glass bottles which is obviously much less energy intensive than remelting it into all-new bottles.
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$707 seems pretty steep per panel. The expensive panels are around $350 each and I would guess the mounting hardware can't be much more than $100 per panel.
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Regenerative brakes aren't a separate part, it's just using the drive motor differently. It's probably already enabled in the motor controller and the brake position sensor mentioned will probably go to the controller to increase regen as the pedal is pushed.
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Liquid elemental mercury is actually relatively harmless to humans. What's harmful is mercury vapor or when bacteria convert elemental mercury into biosoluble forms.
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Solar panels won't help too much. A typical 300w solar panel with 33% insolation will, at Zack's R1T's energy consumption of 2mi/kWh, will give you an extra 5 miles of range per day. Pulling an extra trailer will probably use more than this gain.
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The plug I saw appeared to be a 30 amp RV plug. While higher current it's still only 120v.
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I hope he posts a correction for this.
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But how cold is your basement/garage?
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The tanks are really strong. A regular automobile crash won't do anything. IIRC in Toyota's testing they needed armor-piercing missiles in order to rupture a tank.
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Air to air is more efficient than air to water to radiator. Air to water to underfloor is more efficient than both but also more expensive.
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You can't use Romex out in the open, only in protected areas like inside walls.
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I've broken a smartphone screen twice, and neither was due to gravity-realted impacts. The first time was a junk Samsung from 2008 or so I had discontinued use of. I was taking it apart for fun and cracked the screen when trying to reseat it. The second time was in my pocket, probably keys or something else hitting just the wrong way. That sucked because I otherwise would have put the SIM card back in the crappy Samsung if I hadn't broken it.
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It seems great but it's actually not worth it. Best case the panels would charge around 4 miles per hour in full sunlight. If you're traveling 50 it would make less than a ten percent difference.
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If an average person drives 12,000 miles/year and an average EV uses 350Wh/mile then we can assume the car adds 4200 kWh/year.
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Are you familiar with the phrase "not in my backyard"? It's literally that. Rooftops are otherwise wasted space.
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Luminaires are the fixtures. Regarding the little circuit boards in CFLs, that's where I get many components as an electronic hobbyist.
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On the other hand if they worked together more they would all share more bugs.
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@CodyAMason In critical control systems they use a redundant setup with different implementations by different groups. Although I suppose if they work together each company would only need to do one.
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Gauge-based systems made sense back in the day. The number was originally based on the number of times the wire would be stretched through a die in manufacturing. The higher the number, the more times it's stretched thin. While it's annoying it does make sense given the history. Well, except for the multiple zeroes. Negative numbers would be most logical.
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I don't think you have 32 amps on a regular household outlet so it's still "so much power". Here in the US we use 480v and occasionally 600v if something really needs power.
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@jeffgayzose8129 I don't think it's that much more difficult. They would probably use multiple smaller packs instead of one giant one. This would afford designers more flexibility as well as make replacement more manageable.
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@jeffgayzose8129 Batteries and electric motors will never be 3x more efficient because they're already well over 75% efficient in practice. The only issue is energy density of the batteries. I don't think making the batteries removable would take up much more space. No matter what the battery needs its own (fairly) protective shell and the chassis needs provisions to hold it. To make it removable you just need to make the holder accessible without taking the machine apart. It doesn't need to be as easy to change as a power tool battery. I'm envisioning something more like how the starter battery in an ICE vehicle is held, something that may take a few minutes and even require basic tools.
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The motor is probably the most reliable part in an electric vehicle. Unless it gets physically damaged the only things to wear out are the bearings, and these should be replaceable when the time comes. IMO the thing to worry about with electric vehicles is the battery.
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If you need to access under the panels you must remove the panels.
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Modern heat pumps can provide lots of heat below freezing temperatures. The electric heat strips shouldn't come on very often unless the unit is too small.
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