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How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Sun Oct 04, 2020 11:23 am
by drbrake
Would I need to install Leaf Spy or something?

What us the maximum amperage I can take fill advantage of? And is there such a thing as an l2 charger too powerful to use? Or does it just automatically step down to what I can handle?

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Sun Oct 04, 2020 12:19 pm
by Oilpan4
A 2017 will max out at 6.6kw. If you plug in say a 7.2kw evse the car is only going to draw 6.6kw. Same as my 2011, if I plug mine into a 6.6kw or 7.2kw evse it's only going to draw about 3.6kw because that's the max that the 2011 and 2012 cars charged with.
I think if you have leaf spy and turn the car on while plugged in it will show power draw, but I never tried it on my car.

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Sun Oct 04, 2020 12:20 pm
by LeftieBiker
If you prefer amps, the max draw for a Leaf is 27.5 amps.

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Sun Oct 04, 2020 1:26 pm
by SageBrush
drbrake wrote:
Sun Oct 04, 2020 11:23 am
Would I need to install Leaf Spy or something?

What us the maximum amperage I can take fill advantage of? And is there such a thing as an l2 charger too powerful to use? Or does it just automatically step down to what I can handle?
EVSE or DCFC ?

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Tue Oct 06, 2020 11:40 am
by 1byte
Leaf Spy Lite (free for Android) or Leaf Spy Pro will indeed tell you how many amps are going into the battery via displaying a negative number. Negative number equals amps going into battery, positive equals amps coming out. Remember this is the amps going into the battery. If you are sitting in the car while charging and also running other things like heat or air con, you'll end up with less amps going into the battery.

volts (battery pack volts) * amps = watts
watts \ 1000 = kW (or kWh)

At a L2 6.6kWh charger you should see 15-16 amps going into your battery depending upon other active power loads.
At a DC 50kWh charger you should see a range between 100 - 125 amps going into your battery.

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Tue Oct 06, 2020 11:50 am
by cwerdna
1byte wrote:
Tue Oct 06, 2020 11:40 am
At a L2 6.6kWh charger you should see 15-16 amps going into your battery depending upon other active power loads.
At a DC 50kWh charger you should see a range between 100 - 125 amps going into your battery.
Charging rate is measured in kW, not kWh. 6.6 and 50 kWh chargers make no sense.

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Tue Oct 06, 2020 2:53 pm
by SageBrush
1byte wrote:
Tue Oct 06, 2020 11:40 am
Leaf Spy Lite (free for Android) or Leaf Spy Pro will indeed tell you how many amps are going into the battery via displaying a negative number. Negative number equals amps going into battery, positive equals amps coming out. Remember this is the amps going into the battery. If you are sitting in the car while charging and also running other things like heat or air con, you'll end up with less amps going into the battery.

volts (battery pack volts) * amps = watts
watts \ 1000 = kW (or kWh)

At a L2 6.6kWh charger you should see 15-16 amps going into your battery depending upon other active power loads.
At a DC 50kWh charger you should see a range between 100 - 125 amps going into your battery.
Thanks for making the effort to get units right. It helps a LOT. A few typos though:

1000* watt = kW
Chargers and EVSEs provide power, thus kW.
Over a charging session, power * time = kWh (energy)

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Wed Oct 07, 2020 11:16 am
by 1byte
SageBrush wrote:
Tue Oct 06, 2020 2:53 pm
Thanks for making the effort to get units right. It helps a LOT. A few typos though:

1000* watt = kW
Chargers and EVSEs provide power, thus kW.
Over a charging session, power * time = kWh (energy)
Completely overlooked the kWh mistake, you all got me :roll:

Now how does 1000 multiplied by watt = kW ?

1000 X 6600 = 6600000 kW ??

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Wed Oct 07, 2020 12:24 pm
by SageBrush
1byte wrote:
Wed Oct 07, 2020 11:16 am
Now how does 1000 multiplied by watt = kW ?

1000 X 6600 = 6600000 kW ??
watt = watt
1000 = k
multiple watt by 1000 on the left and multiple watt by 'k' on the right

So e.g.,
6.6 kW = 6,600 watts

Re: How can I tell how many amps my Nissan Leaf 2017 is receiving at a charger?

Posted: Thu Oct 08, 2020 6:17 am
by 1byte
SageBrush wrote:
Tue Oct 06, 2020 2:53 pm

Thanks for making the effort to get units right. It helps a LOT. A few typos though:

1000* watt = kW
Chargers and EVSEs provide power, thus kW.
Over a charging session, power * time = kWh (energy)
To calculate watts produced or consumed-
volts * amps = watts

To calculate kilowatts produced or consumed-
volts * amps = (watts / 1000)

Rarely does someone have the need to convert kW back to watts as the primary reason for converting it to kW in the first place is to make it more human readable. But if someone did for whatever reason what to yes the formula would be:
1000 * kW = watts