EV RVs?

I drove my lead sled EV for 10 years, 50K miles. That's with a nominal 55 mile range and zero charging stations. My takeaways:

Leaving home every day with a full charge and never having to stop for gas is nice. It was not transformative, meaning it would not entice me to get an EV for that reason.

There were a few times I would run the heater an hour before I drove to clear ice or snow. My EV did not have A/C but had it, I might have done that more often (more >100F days in ABQ than <32F ones).

Handy to have a high voltage source of DC. It could run 120V resistive loads (incandescent lamps) and brushed motors directly so if power was out I had lights and could run fans, vacuums, power tools and most anything with a switching power supply like computers and electronics. I powered my ham radio Field Day operation from it one year, which was fun (radios, lights, computers).

My EV did not have regen. It turns out, and I suspect modern EV's might present this data, you net very little energy back to the batteries via regen. Two factors contribute to this - regen energy requires propulsion energy, meaning you won't get regen without some form of energy input to begin with. Hills don't usually factor for much because if you end up at the same place you started every day (e.g. home) then you have as much uphill as downhill on that round trip. Except for some cases of extreme stop and go driving, like maybe a bus that accellerates to speed and stops every 2 blocks, you don't brake a lot in normal driving, unless you're a speed demon. I studied my Ah use over many trips to work (same route and speeds hundreds of times) and estimated the energy lost to braking (speed delta vs time) and it worked out to 10% braking loss. For my typical range, getting that back would only net me under 10 miles, not really a game changer. The second factor that makes regen not amazing is efficiencies. Every step of energy conversion has losses, from mechanical to electrical to chemical. If you can get regen for "free" in the form of a simple electrical process (e.g. induction motor and existing inversion/conversion) then there's no reason not to have it, but in terms of range gained it won't be a lot. If you drive conservatively there is negligible gain, if you drive aggressively it won't make a huge difference, your range will still suck, just maybe a bit less.

EV advocates then, as now promote the lack of EV maintenance and repair. Sounds plausible but during the time I drove my EV I compared operating costs of it vs my wife's car at the time, a Mercury Grand Marquis. Frankly, the car didn't need much in the way of maintenance and repair either. A biannual oil change, a serpentine belt, tires, some consumable parts like lamps and wiper blades. When that car hit the 180K mile mark I had to do more in the way of hard repairs like seals, a radiator, brakes and such but even those jobs on that chassis were not very expensive or difficult. I drove that car to the moon (230K) before it cracked a head and I walked away from it after almost 20 years in service.

What few EV (and solar power) advocates will acknowledge is lost opportunity. There are more and less expensive ways to get into an EV but they're all more expensive compared to ICE. That ownership/acquisition premium is revenue lost for any other use. One can extrapolate and anticipate fuel or other cost savings but that break even point is way out there, likely longer than most people keep a car. Buying a $60K EV to save a a thousand bucks or whatever a year on gas never breaks even. More power to you (pun intended) if you can hit that sweet spot and net some savings years later but it requires a narrow path of everything working perfectly, mechanically, financially and logistically, for that to happen. That's not my world nor most people's. I would rather spend that money today on things I need or want to do than bet I might break even 15 years or whatever from now.

There's nothing wrong with owning an EV because you like it, just like owing a corvette vs a camry. My observations from years ago haven't fundamentally changed if economics are the motivation - the EV has to solve a problem you have otherwise it's entertainment. I know exactly two people in my social circles that have EV's, a husband and wife that are techno-gadget addicts. I noticed he had an apple ipad mounted to his dash and asked him what that was all about, apparently the car infotainment center wasn't compatible with whatever streaming service he wanted so he has to strap on a separate gadget to get it. Thought that was kind of funny, not unlike me having to suction cup a GPS to my dash because the factory one sucks. Anyway, I find all of this EV banter somewhat amusing because after 30 years or whatever there's nothing new under the sun. Range has improved 10x but it's still not enough, EV's are reliable and capable cars but so are ICE's, and no matter how many charging stations you put in it will never be enough. Probably the practical answer going forward are hybrids, where most of the time you plug in at home and on the trip to grandma's house you gas up in the hinterlands. No matter how bad you want something like an EV RV you can't get around the need for megawatts of charge infrastructure out in the boonies, where today you don't even have gas stations. Kinda fun to think about having a house battery big enough to run your RV for weeks at a time but the hard reality is that many watt hours of battery is large dollars to buy, above what the rest of the RV costs to build and operate. That's not to say it couldn't change when the Back to the Future Mr. Home Fusion comes around but all the wishing and rationalization for it will not make it so, today.

Mark B.
Albuquerque, NM
 
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If I ever eventually consider an EV it would most likely be a hybrid.
I consider hybrids as a vehicle that has all the disadvantages of ICE & EV in one vehicle.

However, I do like the idea of the so-called "ER Hybrid" which is a true EV with a generator used as a DCFC to recharge the battery,

-Don- Auburn, CA
 
you net very little energy back to the batteries via regen.
I do not see that as the big advantage of regen. On the freeway there is no regen until the vehicle is slowed down and that isn't often or much.

However, it does make a significant difference in city driving. While ICE vehicles waste energy at every stoplight, EVs gain as they slow down.

The small battery charge gain of regen only applies when you must slow down or must stop, and when driving very slowly down a hill. ICE then wastes power instead of gaining it, even if not all that much.

But the big advantage of regen is when going downhill, and not so much for the battery recharging but for the way it handles. No need for the brake pedal on a steep curvy downhill road. Many of such roads around here.

In the hills, with ICE, I prefer a stick-shift to an auto-tranny.

I prefer a modern EV to either.

BTW, brake lights in EVs come on when the vehicle slows regardless of reason.

So when you see an EV in front of you with brake lights on at every curve, most likely the brake pedal was not even used.

A place that is pancake flat won't see the big advantage of regen other than if one likes the one-pedal driving.

For my typical range, getting that back would only net me under 10 miles,
But if you run out of juice a mile from home, you will wish you had it!

I tell people who own electric motorcycles who say one type of bike only has two miles less range than another, "that is a lot when you have to walk the bike the last two miles."

Hills don't usually factor for much because if you end up at the same place you started every day
AFAIK, nobody is claiming EVs are perpetual motion machines! But it is better to gain energy in only one direction than to lose energy in both directions as with ICE vehicles.

no matter how many charging stations you put in it will never be enough.
? I could get by with none at all anywhere, except for with my motorcycles. And since the average driver drives less than 40 miles per day, that goes for many others too.

More range in the EV means less charge stations are needed. But we are slowly getting more of each.

You even got by with your 55-mile range, didn't you? To me that would be a hassle as you probably had to recharge it after every time it was used. But at least you could do that at home. Did it only charge level one (120 VAC)? ~1.5 KW?

How many KWH was the battery and what year was the vehicle? What type of battery or batteries? I assume it was around a 15 KWH battery. Two of my motorcycles have a larger battery than that, one is about that size. But the one I take on my RV trips is half that size.

-Don- Auburn, CA
 
If I ever eventually consider an EV it would most likely be a hybrid..
Just as a data point for comparison:
I've had my HEV (not PHEV) Maverick for a month and a half and I've been getting 42-50 mpg around town, using the "EV Coach" feature (there's a "Brake Coach," too), which tells you when you're in hybrid or electric or charge mode, and has a visual indication of how much charging or power consumption (%), encouraging you to use a gentle foot on the go pedal and also on the brake pedal. Note that it uses a continuously variable transmission (CVT) - love it.

I just finished a round trip from Denver to Dallas area and back (family) and when I got home the read for the trip showed:

1653.1 total miles, 220.3 of which were in electric mode, and I got 36.7 mpg in a total of 31:22 driving time. Note that the Maverick hybrid has a 13.2 gallon gas tank.

On some short runs around town I've seen more than 52 mpg, but low to mid 40s is much more common.
 
That's only 2.2k of your "common" DCFC charging stations leaving zero power from Diablo for the rest of California. Or... 546 4 megawatt stations like your Carson City stations...
There is a lot of stuff to take into consideration. First, a MW charge station will not stay at a million watts unless the SOC% is low, batt temp is perfect, and the vehicle can accept the MW. Not many can, for now, only the Tesla Semi, AFAIK. As the SOC% increases the heat also increases and the power out will decrease. The million-watt charger means the million watts is the very peak possible. Will normally be somewhat less, just as with any DCFC other than for perhaps a few minutes or so.

Even when conditions are perfect, they will not stay perfect for long, dropping the power.

It is very unlikely for four MW chargers to be anything near a million watts all at the same time, so it will be somewhat lower, but still hundreds of thousands of watts. Which we have already and quite common. The Electrify America Chargers at Wally Marts that have been installed for many years can do 350 KW. How many were saying that was not possible 20 years ago before they became common?

But I find it strange that people say it will not work when we already have them in service, with more coming. That speaks for itself.

-Don- Reno, NV
 

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