EV Range Estimate Capped at 50.0

On that day I only drove about 15-20 miles. All flat terrain with speed of 40-45mph.
Everytime I fully charged my car my EV range is usually 30 miles. That's why I am surprised to see 8.6miles/kWh on that day.

 

Did you see real big increase in GOM following day, like 50 miles shown on top of this thread?

 

I didn't look at it.

 

That's too bad. If the GOM responded to this event correctly, it should have displayed 50 miles EV range.

 

switching back and forth negates the whole discussion, but not the fact that 50 is a hard cap.

 

Oh, Thank you for clarifying this. I now know why the longer range on GOM. Yeah, if I use EV only on down hill portion of my daily commute, I am sure I can get longer range out of EV too. But that means I would be using gas for all of the uphill and high speed drives. Would it be more efficient? I don't know.

 

yes, that is the goal. but for discussion purposes and testing of ev range, it means ev wall charge only, because when the engine runs, it recharges the battery.

edit: sorry, this reply is to post #27 piplosangeles

 

i can't say for sure, someone would have to put an obd on it. but even if not, the fact that gas got you to the top of the hill means all the ev driving is downhill or flat.

 

I'd say it was pretty optimistic for urban driving - I could probably make the full EER (Estimated Electric Range) if I were just driving my late-night horchata run, but during the day driving that relaxed simply isn't possible. We're at about 36 right now and we probably get 34 overall for our use cases.

We're in the suburbs, but Chicagoland drivers are super aggressive. I've been rear-ended, and been adjacent to people who were rear-ended, by someone who accelerated hard despite being 3-4th in line at an intersection. Most of these incidents involve impatient SUV drivers.

We don't play tricks with our EER. No driving on gas to the top of hills (IL is pretty flat though), though we have run the engine in charge mode once when we had a three-stop run to make. I think our current since-new MPG is in the 190s now (I'll have to check).

Also remember that for us, the Prime is something of a project car and we pretty much bought it because it was cheap. For longer trips we will run our Tesla, on really nice days we'll run a sports car, and for trips to less-vehicle-friendly places we run our "beater" Prius.

 

I made it a little over 60 miles in EV mode one time. I started from the top of Mt Evans (14,265 feet) with the battery empty and drove to Denver (5280 feet). The road down from the summit is ideal for regen because the speed limit is only 25-35, so the battery doesn't overheat and cause it to start engine braking too much. I think it did a little engine braking at one point. It charged up to about 80% on the way down from the summit to I-70, then I-70 to Denver uses only a little energy since it is mostly (but not completely) downhill. I don't remember what the estimated range said, but it wasn't 50 since the battery was never full, and it had no way to know that I parked on top of a mountain at the start of the drive.

 

I did a little experiment. I drove my car for a few days on my daily commute of ~40 miles switching EV/HV trying to keep most of EV on flat and down hill. I got much better miles/kWh record for those three days, but my GOM estimate didn't change much. Still ~33 miles range. On Sat I did short trip of ~20 miles total and used EV on downhill only. I recorded 99.9 miles/kWh for this day. BUT, the following day my GOM is still showing 33.3 miles. So, what does it take to get capped 50.0 miles GOM estimate???

BTW, switching HV and EV like I did to increase the efficiency of just EV portion of my drive ended up using more gas during HV drive, thus overall mpg ended up much less efficient at bellow 199.9 mpg.

 

my ev estimate always goes down after driving hv. no idea why.

 

Well, GOM must use not only last few days of EV efficiency, but also consider some other factors such as HV use to estimate the EV range. If I live on top of the hill, I can try using EV only on downhill. But since I live at low land, I have to drive up the hill using HV to use EV on downhill. If I used EV for the uphill portion, then my miles/kWh get much smaller like my first day of the experiment ~5.6miles/kWh.

 

After nearly 78,000 posts here and 14 years of participation... let's try to use that experience to help us all advance to the next level. It's really important at this stage to engage in the more informative discussion. We are the ones who make that progress forward happen, by posting messages that are constructive.

Think about how poor of a job salespeople at the dealership do for actually selling the technology. We all get frustrated by their "no idea why" responses. Doing the same here puts us at the same level of disinterest. The more we share our understanding with others, the better off everyone else will be.

In this case, the answer to why is simple. The system takes an average based on the outcome of how the battery was recently used. Electricity shared with HV is less efficient than just using it with EV. The traction motor (along with associated components) isn't being used to its full potential, which is optimized for efficiency.

 

The explanation seems to fits my observation. Although in my case excessive use of HV did not affect the GOM at all. However, artificial increase in EV efficiency during EV mode alone did not raise the GOM either. That means merely increasing average miles/kWh record of EV drive is not enough to make GOM range to improve. It must be overall fuel efficiency including HV drive plus something else like temperature or it maybe monitoring much longer period of average efficiency than I have experimented. Now I am so curious how I can make OP's value of 50.0 miles EV range or anything close to it. My highest GOM EV range have been 34.3 miles and the longest actual distance driven by a full charge is 35.9 miles.

 

pedantic

 

Nepal??

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