Towing costs - help with calculations

[cal]

Oct 18 no trailer or heavy load just wife and I

Started at 80% SOC - drove 56 miles dropped to 63% SOC
Charged back to 80% Total charge added 17% Seems like I've been told to multiply % charge times the battery capacity 131 kWh to calculate total energy added.

17% of 131kWh is 22.27 kWh added x $.0816/kWh = $1.82 cost to drive 56 miles Is this correct?

Oct 22
Started at 80% Set trip 1 to record all truck travel info I recorded the actual odometer readings and used trip 1. They matched at the end of the day. Loaded up trailer (3,000 lbs unloaded) with tractor (2,685 lbs) and drove to neighbors house total trailer weight 5685 lbs

Trip to dump 1900 lbs load + 3,000 lbs for trailer

Drove back to neighbor's house and left the trailer over night (took the truck back home)

Next day Oct 23 Second dump trip (900lbs + 3000lbs)
Returned to neighbor's house, loaded up the tractor and returned home

Starting Odometer reading was 7396.5 Ending 7426.4 miles Total miles driven 29.9 miles
Here's where things get confusing I have two different charge records. One at 10% and another at 16% (can’t find this one anymore)

16% added x 131 kWh =20.96 kWh x $.0816 = $1.71 cost
10% added x 131 kWh = 13.1 kWh x $.0816 = $1.07 cost

This seems really cheap considering the load was two adults and a weight of 1900 lbs plus the weight of the trailer 3000 lbs (total 4900 lbs trip 1 and another 3900 lbs for trip 2
I did not charge over night in between trips. Recharged to 80% Mon Oct 23. I did transport the tractor twice but only about 3 miles total.

At $1.71 or $1 this seems really cheap considering the load I was hauling. Am I doing these calculations wrong?

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[RickLightning]

What speed were you towing at?

 

[Yellow Buddy]

Oct 18 no trailer or heavy load just wife and I

Started at 80% SOC - drove 56 miles dropped to 63% SOC
Charged back to 80% Total charge added 17% Seems like I've been told to multiply % charge times the battery capacity 131 kWh to calculate total energy added.

17% of 131kWh is 22.27 kWh added x $.0816/kWh = $1.82 cost to drive 56 miles Is this correct?

Oct 22
Started at 80% Set trip 1 to record all truck travel info I recorded the actual odometer readings and used trip 1. They matched at the end of the day. Loaded up trailer (3,000 lbs unloaded) with tractor (2,685 lbs) and drove to neighbors house total trailer weight 5685 lbs

Trip to dump 1900 lbs load + 3,000 lbs for trailer

Drove back to neighbor's house and left the trailer over night (took the truck back home)

Next day Oct 23 Second dump trip (900lbs + 3000lbs)
Returned to neighbor's house, loaded up the tractor and returned home

Starting Odometer reading was 7396.5 Ending 7426.4 miles Total miles driven 29.9 miles
Here's where things get confusing I have two different charge records. One at 10% and another at 16% (can’t find this one anymore)

16% added x 131 kWh =20.96 kWh x $.0816 = $1.71 cost
10% added x 131 kWh = 13.1 kWh x $.0816 = $1.07 cost

This seems really cheap considering the load was two adults and a weight of 1900 lbs plus the weight of the trailer 3000 lbs (total 4900 lbs trip 1 and another 3900 lbs for trip 2
I did not charge over night in between trips. Recharged to 80% Mon Oct 23. I did transport the tractor twice but only about 3 miles total.

At $1.71 or $1 this seems really cheap considering the load I was hauling. Am I doing these calculations wrong?

Your cost per kWh is really cheap at $0.0816/kWh.
Reversing the math. 29.9mi/20.96kWh = 1.43mi/kWh, this seems right.
29.9mi/13.1kWh = 2.28mi/kWh, this does not seem right while towing.

For comparison, I get roughly 1.5mi/kWh while towing my camper. At my $0.147/kWh that's $0.225/mi.

 

[cal]

What speed were you towing at?

Between 25-60 mph, This was a local trip.Probably averaged 40 mpg

 

[cal]

Your cost per kWh is really cheap at $0.0816/kWh.
Reversing the math. 29.9mi/20.96kWh = 1.43mi/kWh, this seems right.
29.9mi/13.1kWh = 2.28mi/kWh, this does not seem right while towing.

For comparison, I get roughly 1.5mi/kWh while towing my camper. At my $0.147/kWh that's $0.225/mi.

We are blessed with cheap energy. Unfortunately it made all home solar estimates worthless. Way too long to break even.

 

[Pioneer74]

Is your $.0816/kWh figure all in? No extra charges per kWh for distribution or any other charges?

Here is what I pay. My summer rate is technically $.0812/kWh, but with all fees it's $.145/kWh. That could make a big difference in your calculations.

 

[TaxmanHog]

Why is there confusion of which charging records to use, did you accidently delete one, they have dates based on when you unplugged, note lately my Fordpass is delaying charging records until after midnight, yet another flaw in v4.30.2

Your non-towing road trip of 56 miles looks great at 2.515 MPK [miles per kWh]

The towing trip should have used more energy per mile, ex. from 1.0 to 1.5 MPK, but the total distance of 30 miles was a little more than half the prior day trip 56, don't let that confuse you.

21 kWh over 30 miles is 1.43 mpk about right
13 kWh over 30 miles is 2.31 mpk too high

Cost for your trips needs to include the charging loss factor, if you have a FCSP (80 amp unit) it has an "Insight" log which is pretty close to the gross energy consumed including the losses.

17% of 131 kWh is 22.27 kWh / .9 loss factor = 24.74 kWh x $.0816/kWh = $2.02 cost to drive 56 miles
3.6 cents a mile is fantastic

16% of 131 kWh = 20.96 kWh / .9 loss factor = 23.29 kWh x $.0816/kWh = $1.90 cost to drive 30 miles
6.3 cents a mile is nothing to sneeze at.

===========

This is an example of my recent insights log, when the networks are working well this records post a few seconds after you unplug, below the 8:06 am record is the amount of energy to charge my pack to 90% from the prior days driving the energy was actually consumed Friday afternoon.

The 5:43 pm record was topping off to 90% the same day in the afternoon and unplugged.

If you really want to get an accurate record of home charging costs, consider getting an Emporia Vue2 energy monitor to measure the energy to your EVSE.

The Saturday evening 10/21 record, of the 4.29 kWh includes remote start warm up while plugged in as well as the charging energy of 3.346 kWh

 

[biers]

Is your $.0816/kWh figure all in? No extra charges per kWh for distribution or any other charges?

Here is what I pay. My summer rate is technically $.0812/kWh, but with all fees it's $.145/kWh. That could make a big difference in your calculations.

OP must have the save utility I’ve got Clark PUD. We pay $0.0816 a kWh 24/7. Same rate for the last 10+ years. We have a monthly connection fee of $12 but got to pay that regardless of owning an EV or not. No addition admin, distribution or transmission fees. Costs me about $50 a month to drive 1700 miles. We also have gas prices at or above CA rates. We have got to be in the most economically beneficial place to drive electric in the country.

 

[Maquis]

OP must have the save utility I’ve got Clark PUD. We pay $0.816 a kWh 24/7. Same rate for the last 10+ years. We have a monthly connection fee of $12 but got to pay that regardless of owning an EV or not. No addition admin, distribution or transmission fees. Costs me about $50 a month to drive 1700 miles. We also have gas prices at or above CA rates. We have got to be in the most economically beneficial place to drive electric in the country.

God, I hope you missplaced the decimal point!

 

[TaxmanHog]

Appreciate the low costs in energy for the PNW compared to the rest of the USA, my most recent billing cycle cost me $0.2981 a KWH {~12 to 15 cents a mile } still cheaper than my old Powerstroke diesel running {~21 cents a mile}

 

[biers]

God, I hope you missplaced the decimal point!

Whoops. Sure did.

 

[cal]

OP must have the save utility I’ve got Clark PUD. We pay $0.0816 a kWh 24/7. Same rate for the last 10+ years. We have a monthly connection fee of $12 but got to pay that regardless of owning an EV or not. No addition admin, distribution or transmission fees. Costs me about $50 a month to drive 1700 miles. We also have gas prices at or above CA rates. We have got to be in the most economically beneficial place to drive electric in the country.

Where did you miss place a decimal point?

I've seen very few Lightnings around Vancouver. Like maybe 4 over the summer. What color and how long have you had her?

 

[TaxmanHog]

Where did you miss place a decimal point?

I've seen very few Lightnings around Vancouver. Like maybe 4 over the summer. What color and how long have you had her?

He edited his post correcting the value.

 

[biers]

Where did you miss place a decimal point?

I've seen very few Lightnings around Vancouver. Like maybe 4 over the summer. What color and how long have you had her?

Corrected my post.

I've got a white Pro (it was the showroom demo out of Kirkland Ford) and had it since late December. I've seen very few too, maybe one every 2-3 weeks. I seem to spot a R1T or R1S every day though, man are those things popular in WA/OR.

 

[cal]

Why is there confusion of which charging records to use, did you accidently delete one, they have dates based on when you unplugged, note lately my Fordpass is delaying charging records until after midnight, yet another flaw in v4.30.2

Your non-towing road trip of 56 miles looks great at 2.515 MPK [miles per kWh]

The towing trip should have used more energy per mile,

Boy I'm so embarrassed.The 17% charge log is not for my towing trips. I can't find the tow trip charge anywhere. Not showing up in the Ford Pass app, trip data gone from the truck when I reset the trip meter. I rarely delete my Ford Pass data and I'll have to wait for another tow opportunity to check that out.

So below is a two person trip to town and back.

If it takes 17% to charge back to 80% why can't I simply use that % change times the total battery size to calculate energy consumed? Is 17% of 131kWh = 22.27 kWh added correct or not?

I do not intend to add a faster home charger. Been fine using the mobile charger except for the lack of data. I just want to see how much cheaper it is to run my truck. I've always kept gas records on all our gas vehicles. I could clearly see my Tundra's mpg drop when I was towing or winter driving. I rarely let my EV's drop below 50% and never charge above 85%. So I'm typically adding 10-20% on a charge. Just want to know what it costs to add that % back to my truck.

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