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I've not seen it with new HP equipped models (the ones that have 0W heat in case HP compressor stalls). Fan in the HVAC box is around 20-30A. It is air cooled. It needs to run at high RPM for it to generate heat without overheating (air cooled). And maximum heat output of that fan is less than...

When vehicle is cold, heat is extracted from ambient air. I don't have information, that new models with HP can generate heat from motors while stationary. HVAC fan generate heat?

Well, I've seen reports of failed HP compressors and no heat. HP, that can go down to -30*C is cool, but it is plan A2, not B, as it still requires compressor. -40*C, in that I do not believe. Condenser is not big enough for that. And extracting heat from drivetrain/battery doesn't count. No...

We are expecting some traffic here, as first post was mentioned by Sandy Munro (Munro Live): A lot has changed during those years, Heat Pump is awesome, but I'm not happy that there is no plan B for heat generation on those new models. HP's usually struggle at -20*C or below. Also problems...

Mild solar vehicle at best. Adding 5% per day on average and calling it solar is as stupid as calling Nissan Leaf solar vehicle - they have solar panels, therefore solar. NO. If it runs MOSTLY on solar (mostly means more than 50%) then it can be called solar electric vehicle...

"coolant overfill" can't do that. I suspect problem with circulation. For example octovalve isn't working right or something more awesome, for example, hoses are reversed. It is also possible that coolant pump reports it runs but actually it doesn't. Last motor failed due to overheat? Well...

Before using ANY device user should read all safety booklets and instructions. BEFORE using the device. Car is a device. Please read the manual. There are hundeds of other things you must know BEFORE pushing big red button ;)

Key is "Climate scientists say that rising production of natural gas " I agree. But burning it for HEAT does not result in rising production. Burning it to get power to run AC does due to well-to-wheel efficiency. Everything has a place. Oil has place for plastics. Gas has place for heat. Even...

Natural gas heating is definitely not something that should be phased out in near future. It is clean, very very efficient (comparable with natural gas power plant that runs heat pump at home) and has acceptable long term footprint.

The AVAS shall automatically generate a sound in the minimum range of vehicle speed from start up to approximately 20 km/h and during reversing. Where the vehicle is equipped with an internal combustion engine that is in operation within the vehicle speed range defined above, the AVAS shall not...

I coded Leaf's external speaker to STFU when driving forward but left reverse beep on by default (can be switched off with OEM button). Way too many accidents happen in reverse and people literally do NOT move away when I back out of parking spaces. Therefore let it beep by default. Though...

PHEVs don't have that requirement even though they mostly drive electric at low speed.

I hope Tesla will one day play that sound only if it makes sense to play pedestrian "music". That means detecting people walking in parking lots, kids playing ball etc.. Also Level2: loud alert (not manual horn) to those who actually are illegally on driving trajectory (jaywalkers etc). Hmm...

And why getting high quality pure sine wave 2kW (4kW peak) converter not suitable for THIS specific task? It costs around 300 bucks. And adding quick connection plug would simplify usage and adds around 10% to the price. Also you can carry that inverter in the frunk in case you need it NOT at...

Bad design by Generac. Running ICE without removing oil moisture is even worse than not running it at all. Those who specialize for vehicle preservation know that. DO NOT run your car for few minutes. If V2H is "actually a thing" then it would be easy to find few dozen pictures of different...

Just stating that doesn't make it true as well. If I had a generator that I hardly need, I would keep it without fuel and oil. I would not store fuel at all (nearest gas station 4 minutes of driving). Also I would have a bottle of fresh oil waiting next to generator. ICE engines do not require...

This is theoretical reason? Because AFAIK those things are EXTREMELY rare (less than .1%). And even if they are there, they are not being used (less than .1% of annual energy). So it is pretty much impossible to lean away from that usage. As there is none. Likely burning a drop of fossil fuel...

Winter tires (those that are NOT suitable for warm weather) exceed summer tires (incl all-seasons) at temperature below 7*C (44*F). No matter WHAT surface - dry road, wet road, snow, ice, hail, gravel, sand... There are two components for tire grip. How the tread looks like and from what is tire...

We should be honest, every tire has downsides. So this one: Negative - Weakness on dry roads and ice. Negative - Average wet grip, high price, somewhat high wear. This tire is good for high performance vehicle, also noise is better than on average. Good choice for medium winters. Those who...

I recommend Mitsubishi Electric (not Mitsubishi Heavy). Extremely well made. Much better than LG, Samsung... Don't oversize it. The smaller the better efficiency. Run something else in extreme weather.

It has not been confirmed that HP equipped Teslas will do lossy motor trick. Stators already changed some time ago. Also all that doesn't work if HP is out of refrigerant or any other error with the loop. 10kW is ok, nothing special. Many EV-s with HP can do that. Even cheapass 2013 Leaf. Not...

Yea. I'm not sure will lossy motor mode will be used if compressor is not doing that. Maybe for SuC preparation. That would help with speed. Frost that appears at the expansion valve will reduce effectiveness of that "corner" pretty fast. After a while most of the heat exchanger surface is...

For vehicle to be driveable windscreen must be clear. Tesla does not offer heated windscreens. But 1kW of heat can defrost windscreen for vehicle to be driveable at -20*C. Also cabin will be at acceptable temperature (a little above zero). Heated surfaces (steering wheel, seat) will add comfort...

Disagree x 4 mongo MP3Mike Eugene Ash Big Earl Well.. as we see, resistive heaters are still there. Though they are still inside HVAC unit. Though making them 14V ones simplifies the design. I bet they are around 40A each with just on/off relay/transistor. If HP stops for more than few minutes...

I don't believe air moisture has condensation heat to give out to the fins. Though solidification heat is available. I believe the weight of air moisture that is in gas state (humidity) is much smaller than the part that is liquid (fog). Mostly it is that "wetness" in air that solidifies on the...

Battery. Is. Not. A heat source. In cold. Conditions. Similarly Toyota is not "self charging hybrid". Patent ≠ actual design used

Sublimation between water and ice? That happens at 0*C at 1 atmosphere. Can't change that. Defrosting energy is lost, that is inevitable. Much more is lost if one opens a door of the cabin in cold weather:D Maybe there is something to play with if ambient is just a degree over 0*C. But in that...

Can't slow down HP because energy is required ASAP. The most amount is required within first 10 minutes. And 90+% commutes are up to 30 minutes. So it won't even get to first defrost cycle. Also in demo scenario, if HP is off, heat exchanger temp is -2*C. If it is "slightly active" it is -3*C...

Because the edge of frosting is around 0.1*C (celsius). And it's usually well below that. For example -2*C. Medium inside the exchanger gets closer to external temp. Therefore negative* temps for glycol fluid. Absolutely works that way too. So heat exchanger inlet is for example -15*C and outlet...

Ice is a good insulator. As soon as area between fins is full of ice and no air passes through, it's done. External glycol heat exchanger will freeze and unfreeze in a similar manner to refrigerant heat exchanger. For defrost to happen rapidly likely HP will generate a lot of heat during short...

Resistive heater is 100% efficient. Useful for cabin heating. External AIR heat exchanger requires airflow to exchange heat. So there is a reason to defrost a heat exchanger. There is nothing to get from ice.

All EVs with heat pump have defrost cycle. It works only when vehicle is stationary for few minutes OR vehicle has radiator shutters that are more-or-less airproof. Tesla will also do defrost cycle. Refrigerant is rerouted to external heat exchanger heating it up making it hot.

Oh snap. Thread name should be Vehicle classification by propulsion system Hope moderator will fix soon. EDIT: Maybe something like that would help visualize. Many versions with different arrows (and arrow sizes). (what about hydrogen)

I was trying to make a COMPLETE list of vehicle types according their power source. First I had to skip the idea that I will make a list of car drivetrain types. As there are.. 3 wheeled "cars" and same looking mopeds. Then it went to e-scooters and bicycles. Then I concluded that complete...

Logistical and emotional issues have nothing to do with battery health. Let's keep them separate. 0% is actually VERY high voltage and is "healthwise" far from zero. 0-80% gives better cycle life. But difference is less than 1% capacity drop per year. So hardly matters.

There are 3 cameras looking forward. Likely long-range cameras was not used before.

Same s**t happens in EU too. Some stricter measures are planned...but they are not strict enough.

Why is Audi E-Tron selling so well in Norway? Multiple reasons. It is "new" on the market. It's not cool to have exactly the same vehicle as neighbours. It is actually premium (not in terms of autopilot) vehicle with premium feel and build quality. Norway is not poor/average country so premium...

So are people afraid of aluminum? No. It's not about aluminum, it's about actual design (bends, thickness, frame below the surface..) BMW has aluminum hoods since 2005 (and doors, and trunks) and never has anybody complained about dents. Ever.

I confirm. I've cycled my EV between 1-7% and 80% a LOT and I have one of the best battery state in my climate.

Whatever the climate, it is never going from summer to -20*C without passing -5*C. Even in Norway, weather in winter is mostly below zero (celsius) single digits. Number of days with mild cold weather is large and number of days where heat pump is not sufficient is low. There are absolutely no...

Split-type reversible inverter HVAC system has MASSIVE heat exchanger (outside). I estimate around 4-5 more surface area. Cars do compensate with either more fan power or travelling at high speed but unfortunately stationary systems, due to no size constraints, are more efficient that automotive...

And the reason WHY Tesla will never state a number...because EPA. Nissan did specify "recommended" SOC and look what happened. EPA takes BATTERY SAVER MODE (80%) in consideration when calculating official range. This is why Nissan disabled 80% mode a year later... only in US. ONLY..in US. And...

The reason most countries in the world chose Type2 and not Type1 is because in most places 3-phase power is actually used everywhere. In US/Japan (Nissan Leaf), even though 3phase is available, it is not used at residential homes. Therefore it appeared that cars should only have pins for single...

They need about 160kWh of battery to get that kind of range. Yea. Maybe the will have some cars. Like few thousand.

NEDC was ultra unrealistic. WLTP is appropriate for grandpas and grannies actually. It is reachable, but not in "modern traffic". So to get EPA from WLTP it is around 10% less. So 390 miles in case of EPA. Anybody makes a vehicle with official range lower than 100D - haha. Anybody makes a...

When power electronics (and AP computer) are deactivated it doesn't make sense to circulate coolant for long. Below 50*C battery does not require "emergency cooling". You might have a software/hardware problem. Some transistors fail into "always on state". Also software upgrade procedures...

I made an article on Wiki trying to sum up ALL possible mixes in the world. Vehicle classification by propulsion system - Wikipedia. Anybody who is active on Wiki can contribute. Extremely welcome are those who can make tiny pictograms consisting of power source(s), power accumulator(s)...

Half of crashes are not due to driver in the vehicle. Rather driver in another vehicle. Dealing with second half of crashes is dealing with other people crashing into you.

Double complexity (e-tron has similar idea). Chademo port is useless, use adapter. CCS is the only port in "not US". So problem has been solved pretty much.