focussed
Posts: 49
Joined: Tue Oct 07, 2014 3:41 pm

Re: The point of value charge

Thu Sep 14, 2017 11:45 am

That is correct. Value charge is there to minimize the cost of electricity when charging your vehicle.

campfamily
Posts: 444
Joined: Tue Apr 21, 2015 8:07 am
Location: Southern California

Re: The point of value charge

Thu Sep 14, 2017 12:02 pm

I can think of a couple of other, perhaps less important, reasons to use value charging:

1) Charge at night when it is cooler, to put less strain on the system (this might not be real, but I notice when I charge in the late afternoon in the heat, the car fan runs continuously, vs charging at night when it is cool).

2) Charge at night when demand is lower, hence putting less stress on the power grid.
2a) If you have an older house, charge at night when your useage is lower, hence putting less stress on your electrical system (some older houses don't have power systems that are designed for such high loads at the same time).
Last edited by campfamily on Thu Sep 14, 2017 12:45 pm, edited 1 time in total.
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

spirilis
Posts: 154
Joined: Fri Jul 14, 2017 4:53 am
Location: Maryland

Re: The point of value charge

Thu Sep 14, 2017 12:07 pm

that or if you're in a situation where you need a little boost at a public charger, but it costs (and is expensive), maybe charge only what you really need using a time window... although I haven't checked to see how granular the time windows are or how quickly you can identify the current GPS location as a valid charger...
(it looks like you have to begin charging, first, in order to identify the current GPS location as a charging location, then you'd have to set up a value charge profile and hopefully it can switch to your new profile while it's charging)
2017 Ford Focus Electric (Magnetic)
2017 Ford C-Max Energi SE (Kona Blue)

merkurmaniac
Posts: 33
Joined: Thu Jun 23, 2016 12:21 pm

Re: The point of value charge

Thu Sep 14, 2017 12:58 pm

My car gets home around 5pm, maybe an hour or two later. If it starts charging right then, it adds to the peak demand, which is when people get home, hit the a/c, cook dinner, watch TV, etc... When demand is added to this peak, it makes it more likely that another plant somewhere would come online to satisfy that peak demand. The "peaker" plant is usually an inefficient gas turbine.

After midnight, the wind is still blowing, and most people are asleep. Outside temps are milder and a/c's don't have to work as hard. Demand for electricity drops to the lowest point. There may be enough wind power, that most of the power may come from wind. Even some coal plants might "go to bed."

So.... do you want your car charged by a peaker at 6pm, or by a wind turbine at 2am ?

For me, that's an easy call.
Richard

jmueller065
Posts: 2397
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Location: Southeastern MI
Contact: Website

Re: The point of value charge

Thu Sep 14, 2017 1:45 pm

There is another reason: The battery will last longer if it isn't at full charge all the time. Thus if you use value charge to ensure its only full right before you leave in the morning the battery will spend a minimum amount of time at full charge.
2018 Cajun Red Chevy Bolt
2016 Magnetic C-Max Energi (lease returned)
2014 Sunset Escape
2014 Thor Axis (V-10)
2013 Focus Electric (lease returned Jan 2016 for the C-Max above)
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FiSh
Posts: 45
Joined: Tue Aug 01, 2017 6:35 am

Re: The point of value charge

Fri Sep 15, 2017 6:15 am

spirilis wrote:that or if you're in a situation where you need a little boost at a public charger, but it costs (and is expensive), maybe charge only what you really need using a time window... although I haven't checked to see how granular the time windows are or how quickly you can identify the current GPS location as a valid charger...
(it looks like you have to begin charging, first, in order to identify the current GPS location as a charging location, then you'd have to set up a value charge profile and hopefully it can switch to your new profile while it's charging)
It will not stop charging if your car is not fully charged and you're out of Value window.
2017 FFE, Oxford White

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