No Percent Charge Option, Right?

You can stop the charge manually without pulling the plug if you started it with chafe now just by turning off charge now. I've done it. But a charge to 80% and stop function doesn't seem to be available. I'd use it if it were.

 

I still haven't signed up for Entune or Safety Connect, so I haven't used the app.

 

That is already part of the design. It automatically stops.

85% is maximum charge. 15% is left for untouched for battery longevity.

 

And 70% of maximum charge will extend battery longevity even further. I consume about 50% of charge getting to work and about 15% getting home. Why not extend battery life?

 

Charging Stations report how much electricity was delivered. A full recharge only takes roughly 6.5 kWh (stored in battery, plus charging losses), well short of the 8.8 kWh capacity.

If you want greater longevity, allow the battery to cold-soak as much as possible before the charging starts by taking advantage of the timer scheduling. Also, keep it out of the extreme heat.

 

how would it save on the power bill?

is there some kind of commercial timer you can plug into, that would allow you to shut it off at the wall?

 

Let me suggest these solutions:

1. Measure rate of charge per hour for L1 and L2 charging and total:
   1. BMW i3-REx: 5%/hr (L1); 20%/hr (L2); 100% @18 kWh
   2. Prius Prime: ~20%/hr (L1); ~50%/hr (L2); 100% @6.4 kWh
2. Dumb EVSE - plug EVSE into a heavy duty, timer, 20A, and set it to run long enough to add the user indicated charge you want. @john1701a has already answered the absolute charge question and I'm in his camp.
3. Smart EVSE - as an alternate to time, set the charge limit to a value that will give exactly the amount needed to achieve the user indicated charge.

This will add a few extra steps when parking including the mental calculations. I'm not quite that OCD to worry about the indicated SOC except when I run an errand and have insufficient SOC to reach home. If needed, I'll extend my 'shopping' to make sure I can reach home in EV.

As a reminder, also have a rag or tissue to wipe down the rear view camera lens. I just use my fingers and wash my hands when I get in. Fingers also work on curb sensors.

Bob Wilson

 

It sounds to me like you somehow think that the power remaining in the battery at the end of the day will somehow be "lost".
It won't.
And when the battery meter says "full" it really is something around 80%.

What you are wanting to do really would accomplish...........nothing useful.

 

So we're talking a kWh to work and a kWh from work savings. That's 2 kWh per day and at $0.10 - $0.20 kWh, you're looking at $50 to $100 savings a year.

If it were me, I'd set the timer to finish about an hour later than when I actually leave in the morning.

 

great idea! might take a little experimentation to get it right, especially if you're not starting from the same charge % everyday.

 

So.....given the figures that you supplied,
How about not changing at home AT ALL, given that the cost is about 80% of gas anyway ??

That will use a little bit of gas each day and will help keep the fuel fresh.

 

5 years (and 92,000 miles) of Prius PHV ownership makes this topic moot. I didn't do anything extra. Just plug & drive.

 

You actually CAN teach an old dog new tricks.
The problem is getting him to UN-learn the old ones.

I know 'cause I are one.