My EV Driving ratio

i hit 50/50 lifetime! 3230 ev and 3170 hv. you can see my stats (including the winter gas mpg's ) on the spreadsheet, as soon as ken converts them.

 

looking good, but you need to take some electric scenic tours in your free time!

 

Hit 50/50 today (lifetime). Which is very good, considering my 55 mile commute includes some 75mph freeway driving. And, I can't charge at work.

 

All of my weekend driving is EV and I make it a point to charge anywhere and everywhere I can find an outlet. But during the week, toggling yeilds the best results. EV for accelerating up to speed and HV for cruising. Oh, and 44 psi and lots of coasting. I am thrilled with this car.

 

well done! i'm loving winter, less driving means a higher ev/hv ratio.

 

Just had to fill the tank.



What is the MPGe equation again?

Also, do we have a PiP 1000 mile tank club? I know it is not too hard on the pip but is still a cool achievement.

 

I would argue, based of the detailed measurements I did a couple of weeks ago, that the charging losses are closer to 10%. I've yet to see anyone do any actual measurements that show it is 15%.

Charging efficiency of PIP | Page 2 | PriusChat

Mike

 

we should, it's very difficult for those who can't plug in a lot or drive long distances.

 

I'm just about to hit 1000 miles on one tank for the first time, with 11K miles on the car. Usually longer trips pop up to offset my in-town miles and I only get 700-850 per tank. I have never charged anywhere but in my garage. My lifetime ratio is now 29/71, so I am really impressed with you guys showing 40-50% and higher EV!

 

No. That is a 50% difference. At best 220v is 10-20% more efficient than 110v. When I was doing my measurements I found about 9% in losses in total. About 2/3rds of the kwh were from 220v L2 and about 1/3 from 110v at home. So maybe it is 8% losses with L2 and 10% losses with 110v -- too much noise in the data to get this precise.

Mike

 

I think the attached graph is very interesting. Illustrates the effect of speed on battery consumption. The data is for a Tesla Roadster. I would imagine the shape of the data for the PIP would be similar.

Here is the article.
Can EVs handle the distances we drive? • A Study

 

I assume Cd= drag coefficient.
I was hoping to use the graph to inform my driving style in order to boost my EV/HV ratio.
Based on the graph:
Avoid creeping (<3 mph)
Keep in mind the difference in battery draw of 30 mph versus 65 mph
Tire pressure has a bigger impact at low speeds

Question: In a standard Prius I assume the most efficient traveling speed would be close to the trigger speed for the ICE (~42 mph). Given the the ICE trigger speed for a PIP is ~62 mph how should one go about estimating the optimal speeds. Given its relatively low Cd I assume the PIP's power curve is shallower allowing you to draw less than 150 wh/mile even at 35-40 mph.

 

Yes and no. Friday and Saturday nights I had the EVSE plugged in overnight, timer set to charge at 6am. But both days I charged a second time as well. But I've measured the power consumed while plugged in and waiting and it is only 1.4 watts. So even assuming 8 hours of "waiting time" for a ~3 kwh charge that is only an additional 11 watt hours or 0.4%.

I have no idea how the EPA gets 3.2 kwh. I have never gotten anywhere near that.

Mike