Pearl
Posts: 283
Joined: Wed Apr 13, 2016 3:24 am
Location: Northeast Ohio

Re: Which plug to use 240 or 120

Thu Sep 14, 2017 9:19 am

Carbuff wrote:If I have the option of using a 240v plug or a 120v plug to charge my ffe overnight. Which uses less electricity? They will both fully charge my car overnight and my power company charges the same rate at all hours, is one more efficient than the other? Any other factors to consider?
Charging at 240V is slightly more efficient. But you will probably never see it in your electric bill.
2013 Focus Electric
2013 C-Max Energi
2013 Escape

Smoking_Rubber
Posts: 66
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Location: Pismo Beach, California
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Re: Which plug to use 240 or 120

Thu Sep 14, 2017 9:57 am

Carbuff wrote:If I have the option of using a 240v plug or a 120v plug to charge my ffe overnight. Which uses less electricity? They will both fully charge my car overnight and my power company charges the same rate at all hours, is one more efficient than the other? Any other factors to consider?
Does it take less gas to fill your tank if you fill it slowly? I'm not an expert, but I doubt it.
2017 Chevrolet Bolt Premium (My DD)
2013 Toyota FJ Cruiser (Weekend Beach Buggy)
2016 Mazda CX-5 (Wife's DD)

campfamily
Posts: 450
Joined: Tue Apr 21, 2015 8:07 am
Location: Southern California

Re: Which plug to use 240 or 120

Thu Sep 14, 2017 10:26 am

Carbuff wrote:As it is there is a 30% inefficiency in the charging process.
This is the first time I've heard an inefficiency number this high......I've always heard the charging process was about 85% efficient.

Keith
GONE - 2015 FFE, Magnetic with leather interior, debadged & tinted
38,500 miles (since May 2015), average 246 Wh/mile

REPLACED WITH - 2018 Tesla Model3, LR RWD, Obsidian Black
20,000 miles (since Nov 2018), average 235 Wh/mile

Pearl
Posts: 283
Joined: Wed Apr 13, 2016 3:24 am
Location: Northeast Ohio

Re: Which plug to use 240 or 120

Thu Sep 14, 2017 10:31 am

campfamily wrote:
Carbuff wrote:As it is there is a 30% inefficiency in the charging process.
This is the first time I've heard an inefficiency number this high......I've always heard the charging process was about 85% efficient.

Keith
A comparison of electric vehicle Level 1 and Level 2 charging efficiency
http://ieeexplore.ieee.org/document/7046253/
2013 Focus Electric
2013 C-Max Energi
2013 Escape

campfamily
Posts: 450
Joined: Tue Apr 21, 2015 8:07 am
Location: Southern California

Re: Which plug to use 240 or 120

Thu Sep 14, 2017 11:59 am

Pearl wrote:
campfamily wrote:
Carbuff wrote:As it is there is a 30% inefficiency in the charging process.
This is the first time I've heard an inefficiency number this high......I've always heard the charging process was about 85% efficient.

Keith
A comparison of electric vehicle Level 1 and Level 2 charging efficiency
http://ieeexplore.ieee.org/document/7046253/
Interesting article, thanks for finding this and sending the link. Finally was able to use my IEEE membership for something!!

Keith
GONE - 2015 FFE, Magnetic with leather interior, debadged & tinted
38,500 miles (since May 2015), average 246 Wh/mile

REPLACED WITH - 2018 Tesla Model3, LR RWD, Obsidian Black
20,000 miles (since Nov 2018), average 235 Wh/mile

WattsUp
Posts: 2113
Joined: Mon Jan 07, 2013 2:58 am
Location: SF Bay Area, CA

Re: Which plug to use 240 or 120

Thu Sep 14, 2017 9:17 pm

Carbuff wrote:there is none in the gas filling example.
Technically, the longer you take to fill a gas tank, the more time you allow for some gasoline to evaporate in the process (since the tank is unsealed, plus gas is flowing with some exposure to the atmosphere).

So, with gas too, faster is better. (Granted, the loss to evaporation is negligible.)

(Glad I don't deal with gasoline anymore, though.) :)
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Pearl
Posts: 283
Joined: Wed Apr 13, 2016 3:24 am
Location: Northeast Ohio

Re: Which plug to use 240 or 120

Fri Sep 15, 2017 4:59 am

WattsUp wrote:
So, with gas too, faster is better.
Faster is not really better with charging. Faster charging means more current, means more heat, means more harmful to the battery.
2013 Focus Electric
2013 C-Max Energi
2013 Escape

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