2023 Peugeot E-2008 54kWh GT self-discharge rate

mightyjj

Hi everyone,

I just bought a used 2023 e-2008 GT (54 kWh) with around 13,600 miles on it. It drives beautifully, and I’ve been enjoying it so far.

However, I recently left it parked and completely untouched for about 32–36 hours and noticed the battery dropped by 1% — from 64% to 63%. Is this normal behaviour?

I also took a picture of the energy statistics since the last start, showing its energy consumption in the last 30 minutes. Is it expected for the car to consume this much power while parked?

Would appreciate any insights!

daveyjp

Normal for any modern car to need power whilst sat doing nothing.  The alarms and monitoring systems need power from somewhere.

Mildly_Miffed

...also was it "powered on" whilst parked for that last period? If so, then aircon (and audio?) would be running off the traction battery, too.

Going down from 64% to 63% is not necessarily anything more than a rounding error in the calculation, taking things like battery temperature into account.

mightyjj

Mildly_Miffed said:

...also was it "powered on" whilst parked for that last period? If so, then aircon (and audio?) would be running off the traction battery, too.

Going down from 64% to 63% is not necessarily anything more than a rounding error in the calculation, taking things like battery temperature into account.

It was "powered off" and locked, and the windows automatically folded after it was locked. I just wanted to be sure if this is normal as this is my first electric vehicle.

born_again

A lot of cars still remain powered up for around a few mins, so you do see this. 
1% over day & a half is nothing.

facade

Be careful with Stellantis cars, if you don't start the motor they don't charge the 12V battery, so sitting with the ignition on will drain the 12V battery fairly quickly. (They will switch off after 30 minutes or so to try not to flatten it completely).

My eC4 takes about 15A just sitting with the radio on and the heater fan running.

When the motor is started (and the display says Ready), the 12V battery is charged, but not at a very high rate, (mine manages about 15A with the headlights off, so I'd estimate the 12V converter is only around 30A) it is possible to flatten the 12V battery if you don't drive the car enough.

It is supposed to charge the 12V battery when you charge the traction battery, but again I don't think it charges at a particularly high rate.

If the 12V battery goes flat you cannot even start the car. I doubt if you can charge it either as the charge won't start until the car internal charger switches on the supply.

They do a good job of running the 12V battery flat powering all the alarms & electronics if they are standing unused, 6 weeks or so will see it completely flat.

WellKnownSid

mightyjj said:

However, I recently left it parked and completely untouched for about 32–36 hours and noticed the battery dropped by 1% — from 64% to 63%. Is this normal behaviour?

Perfectly normal.  Wait another 36 hours and you might find it goes up!

Battery temperature, cell balancing and other factors will impact what the BMS reports as the likely percentage.

born_again

facade said:

Be careful with Stellantis cars, if you don't start the motor they don't charge the 12V battery, so sitting with the ignition on will drain the 12V battery fairly quickly. (They will switch off after 30 minutes or so to try not to flatten it completely).

That is the same with any EV.
Never sit in car in ACC mode. Playing with stuff

Either have the car fully turned on, or in utility/camping mode, where the main drive battery powers the 12V side.

facade

born_again said:

facade said:

Be careful with Stellantis cars, if you don't start the motor they don't charge the 12V battery, so sitting with the ignition on will drain the 12V battery fairly quickly. (They will switch off after 30 minutes or so to try not to flatten it completely).

That is the same with any EV.
Never sit in car in ACC mode. Playing with stuff

Either have the car fully turned on, or in utility/camping mode, where the main drive battery powers the 12V side.

I thought it was a Stellantis thing, and more sensible manufacturers would connect the high voltage battery to the DC/DC converter whenever the ignition was on, rather than only when the ignition is on and you start it.

ididgetwhereiamtoday

facade said:

born_again said:

facade said:

Be careful with Stellantis cars, if you don't start the motor they don't charge the 12V battery, so sitting with the ignition on will drain the 12V battery fairly quickly. (They will switch off after 30 minutes or so to try not to flatten it completely).

That is the same with any EV.
Never sit in car in ACC mode. Playing with stuff

Either have the car fully turned on, or in utility/camping mode, where the main drive battery powers the 12V side.

I thought it was a Stellantis thing, and more sensible manufacturers would connect the high voltage battery to the DC/DC converter whenever the ignition was on, rather than only when the ignition is on and you start it.

What do you mean?
 If the ignition is on, it is on. You get in the car and you press Start, this turns the car/ignition on. You cannot run the heater or air con etc without it being on… can you? These high powered utilities would not run on the 12 v battery?
j have a Kia and you can’t in that. 

born_again

facade said:

born_again said:

facade said:

Be careful with Stellantis cars, if you don't start the motor they don't charge the 12V battery, so sitting with the ignition on will drain the 12V battery fairly quickly. (They will switch off after 30 minutes or so to try not to flatten it completely).

That is the same with any EV.
Never sit in car in ACC mode. Playing with stuff

Either have the car fully turned on, or in utility/camping mode, where the main drive battery powers the 12V side.

I thought it was a Stellantis thing, and more sensible manufacturers would connect the high voltage battery to the DC/DC converter whenever the ignition was on, rather than only when the ignition is on and you start it.

No, from the various forums, flat 12V is a issue due to people simply sitting in car in ACC mode.

Although not sure if this is how some of the newer cars work when you enter the car with key & it is already powered up, like tesla. 
So would guess that must engage the DC/DC converter.