Most EV miles on one charge?

We are looking forward to answering this question, as we explore the capabilities of our new Prime.

 

Bonjour
En ce qui me concerne en été j’arrive à faire 48 km. pour 65 affiché au TDB ; et cela en roulant normalement sur route départementales.
Prius 4 PHV mise en service en octobre 2017

 

Without causing a traffic jam behind me, on my 2021 PP, I am currently getting 37-38miles out of a full charge on a good day (meaning no HVAC). With AC on, it averages 34-35miles now. This number, although still a small sample yet, is substantially better than what I was getting on the 2017 PP on a full charge. The average summertime EV range was never that high. It was more like ~32 miles. In wintertime, I was happy if I could get 20 miles out of a full charge with the heater on. I will see how the new 2021 PP will compare to that in Jan and Feb.

 

i've gotten 40....well like 39.7 but close enough

 

Does this imply that there is a mechanical or electrical difference or different battery between the 2017 and the 2021? I use the AC in Summer, don't try to hypermile, and believe the EV miles readout on my HUD. Getting between 30 and 31 miles now; 20 to 24 in the coldest part of the Winter.

 

How fast are you going and is this mostly around town or on the highway?

 

Could something like a tweak in the software.
Or nothing at all, and this is just do to the variance between cars, where they are driven, and the driver.

 

My best is 70km, which is about 43 miles, but I consider anything above 50km a great success. When using the AC at full power and just pressing the pedal I get around 30km.

But even that it is enough to let me accomplish most errands on electric power. Which is what I hoped the plug-in would let me do.

 

Nothing physical has changed AFAIK, but comparing 2017, 2020, and now 2021 PP I have owned, the 2020 and 2021 are taking more charge from the wall for a full charge session. I suspect that Toyota changed the SoC threshold to be used for EV drive. With the 2017 PP, I was averaging less than 6.5kWh/full charge, but now with the 2021 PP, it often takes more than 6.7kWh/full charge.

Average ~35mph, top speed ~55mph, all on rolling hills and valleys on rural roads (some state highway, some residential part of town) with relatively light traffic.

See above. I suspect Toyota changed the SoC threshold used for the EV range. I want to confirm this, but I am having a problem connecting my phone app (Hybrid Assistant) with my 2021 PP. With HA reading, my 2017 PP was consistently using real SoC from 80% to 14%. If they changed this threshold to widen the SoC used for EV range, it explains the >0.2kWh more of charge from the wall and a few more miles of EV range in 2021 PP compared to 2017.

 

When I was commuting I could drive the 39 miles to work in all EV with anywhere from 25% - 38% left, depending on traffic and the stop lights. It was a 1,500 foot net elevation drop over those 39 miles (about 9 inches per 100 feet), but there are intervening hills. It definitely helped, but I don't know if that's even enough slope to get the car rolling on its own.

One time I got a road rage driver for the opposite reason. I was heading down a hill and already at 100% SOC. I knew I was going to have more regen and didn't want the ICE to kick on, so I jackrabbit started from the light in EV mode to burn up some charge and hopefully make the next light that was getting ready to turn. I guess the guy next to me had planned to race ahead, cut me off, and make a turn right at the next block because about two seconds after I took off from the line I hear his motor go all out. He barely pulls next to me and starts swerving into my lane to threaten me, but I just acted like I didn't see him. He was so focused on me that he didn't see the red light in time to stop, so he ended up running it. Too bad there weren't any cops to see it.

 

Yeah, if elevation drop helps, you can drive as long as gravity pulls the car. That can be 100miles on EV if there is such a route in the US. Round trip is always more informative for this reason. My commute is 35.4 miles round trip without any detour, I was able to pull the entire round trip on EV mode only twice in 3 years with the 2017 PP. But with the 2021 PP, I already accomplished this feat, 3 times I drove the same route since I purchased the car a little over a month ago. And I was not even trying.

 

I bet you can't go 100 miles on a 0.75% slope in EV with stop and go traffic and stop lights.

 

Stop and go is another energy eater for sure. What makes me think my 2021 is getting more EV range than my previous 2017 PP is that we now have one additional stoplight on my routine commuting route which we did not have in 2017. The two times I drove complete round trips on a single charge, I distinctively remember that I was lucky and did not get caught on the red light at all. But last three times on 2021 PP, I did stop at least 2 or 3 more times and still got home without the engine starting.

 

Even the 0.75% slope. It's barely a slope. That's a quarter-inch per yard.

 

Has anyone tried Truckee to Roseville (80+) or Sacramento? Sierra-At-Tahoe to Folsom (70+) or Sacramento? Absent elevation restrictions, records would go to these types of routes.

For a Gen3 non-plug-in like mine, that slope is enough to provide a 25% MPG boost even at highway speed. For a newer more efficient model, driven at lower speed on a mountain road, it could provide an even larger percentage boost.

 

Just going by potential energy of rolling a Prius down a 1,500-foot slope, it "adds" 1.7 kWh to the trip. So, 25 - 38% left would be about 0 - 10% left after 39 miles on level ground.

 

That's a steep enough slope to roll the car in neutral, so it won't take any accelerator to keep moving. That can go on indefinitely as long as there is hill to ride. 0.75% is not enough to coast. If it takes 250 Wh to move a mile on level ground, it will take about 210 W/h to move a mile on a 0.75% slope.

Records, as it were, should be corrected by subtracting out the potential energy realized by the descent.

 

That sounds about right. I was able to drive 35.4 miles on EV and had 6% SoC left on my round-trip commute. Here is the round trip elevation profile of my commuting route. I used a map app for this to route using out and back round trip. For an unknown reason, the profile is not perfectly symmetrical. Maybe the right lane and the left lane have a slight difference in elevation? This is not an interstate highway in which roads in opposite directions are separated by a big median. It's basically two lanes (one lane in each direction) rural roads.


or same chart but with grades

 

It's always more complicated than the net elevation difference because going uphill uses far more energy than is recovered or avoided going downhill. My commute includes 1,100 feet of elevation gain and 2,600 of elevation loss. I would guestimate that the 1,100 feet of climbing nearly wipes out the gains of 2,600 feet of descent.