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

  1.  @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.
    10
  2.  @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
  3. 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
  4.  @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
  5.  @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
  6. 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
  7.  @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
  8. 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
  9. ​ @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
  10.  @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
  11. Apparently snowmobiles are huge energy hogs. Other commenters have said gas models get much fewer miles per gallon than heavy gas trucks.
    2
  12. 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
  13.  @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
  14. 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
  15. Positive 60F is positive 15C. Negative 60F is negative 15C.
    2
  16. I would imagine they use virgin glass for fiber optics because they need a high degree of purity.
    2
  17. 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
  18. 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
  19. 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
  20. It's obviously a gimmick but it does indicate you'll still get good acceleration when towing.
    2
  21. If you add weights to the front wheel it should also greatly improve the traction performance.
    2
  22. 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
  23.  @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
  24. I think a much more practical solution would be a charging dock with wired contacts mounted on both ends.
    2
  25. 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
  26. 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
  27.  @orppranator5230  We have similar inspections in the US state of Massachusetts and it only costs $35 per year.
    2
  28. 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
  29. 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
  30.  @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
  31.  @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.
    2
  32.  @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.
    2
  33.  @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.
    2
  34.  @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
  35. 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.
    2
  36. I believe the module at the top of the stack (with the display) houses the inverter.
    2
  37.  @chris101ward  It's definitely not a swamp cooler, that's requires evaporation in the room which is impossible with a sealed A coil.
    2
  38.  @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.
    2
  39. 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
  40. 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.
    2
  41. That's for the entire setup. Even the most expensive panels are under $500 each.
    2
  42.  @UCMENOTx  OP says they are in Texas which is famous both for needing air conditioning and for having subpar insulation.
    2
  43.  @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
  44. 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.
    1
  45.  @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
  46.  @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
  47. 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
  48. 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
  49. 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
  50. It's about 35 panels if you live in the northern US and don't invest much in energy efficiency.
    1