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Re: 2018 first real world range test- disappointed a little

Posted: Sat Dec 08, 2018 2:59 am
by Realev
Hello all, we live in the UK and run similar spec Leaf to the US.
I'm interested to see a lot of opinions on heated seats and steering wheel and power consumption. Just to clear this up, these run from the 12v side of the electric system so have no impact on range. And...... Before some of the 'experts' try to correct me, I work at the plant in the UK where leaf is built.

We're on our 2nd leaf (30kw) and just about to order a new 40kw. Looking forward to see what 60kw is like when it comes out over here later next year.

Good forum, keep it up!

Re: 2018 first real world range test- disappointed a little

Posted: Sat Dec 08, 2018 3:33 am
by LeftieBiker
No one claiming to be an "expert" here thinks that those accessories affect range significantly. You are confusing the questions and misconceptions of new EV drivers with the knowledge of more experienced drivers.

Re: 2018 first real world range test- disappointed a little

Posted: Sat Dec 08, 2018 4:30 am
by cwerdna
+1 on what Leftie said.
Realev wrote:Hello all, we live in the UK and run similar spec Leaf to the US.
I'm interested to see a lot of opinions on heated seats and steering wheel and power consumption. Just to clear this up, these run from the 12v side of the electric system so have no impact on range.
Just because it comes from the 12 volt side doesn't mean it doesn't come ultimately from another place, the big HV battery via the DC to DC converter. As for whether it'd affect range, it'd be minuscule (and likely not measurable) due to their tiny power consumption vs. what's needed to propel the vehicle.
There's no source of free energy.

(http://www.mynissanleaf.com/viewtopic.p ... 27#p523427 posted some heated seat power consumption figures. Compare that to somewhere well over 10 kW just to maintain highway speeds.)

As many of us already stated, it's more efficient to heat the seats than the cabin.
Realev wrote: We're on our 2nd leaf (30kw) and just about to order a new 40kw. Looking forward to see what 60kw is like when it comes out over here later next year.
Battery capacity is measured in kWh, not "kw".

24 and 30 kWh Leafs had 80 kW motors. 40 kWh Leafs allegedly have the same motor but improved output to 110 kW supposedly via inverter improvements.

Re: 2018 first real world range test- disappointed a little

Posted: Sat Dec 08, 2018 5:06 am
by SageBrush
Realev wrote: Just to clear this up, these run from the 12v side of the electric system so have no impact on range..
Any particular power draw being discussed may be a small or a larger amount, but energy pulled from a 12v is replenished from the traction battery while the car is running.

Re: 2018 first real world range test- disappointed a little

Posted: Tue Dec 11, 2018 9:23 am
by lashlee
Realev wrote:Hello all, we live in the UK and run similar spec Leaf to the US.
I'm interested to see a lot of opinions on heated seats and steering wheel and power consumption. Just to clear this up, these run from the 12v side of the electric system so have no impact on range. And...... Before some of the 'experts' try to correct me, I work at the plant in the UK where leaf is built.

We're on our 2nd leaf (30kw) and just about to order a new 40kw. Looking forward to see what 60kw is like when it comes out over here later next year.

Good forum, keep it up!
I've got an '18 SL with about 12k miles on it since the first of July. It was 24 degrees F this morning and the telematics showed a change of 4 miles in range if the HVAC system were switched off. I generally have the HVAC set at 67 degrees F and use the seat heater on low, even this morning. My commute is a mix of interstate and two lane highways of 57 miles (each direction) and I usually get to work with approximately 50% charge left.

I'll also note that I've added a fairly large stereo system to mine with no quantifiable change in power consumption. I've checked the current draw during high load situations and it still peaks at approximately 60A.

Re: 2018 first real world range test- disappointed a little

Posted: Wed Dec 12, 2018 10:35 am
by alozzy
Assuming you have your stereo pulling peak amps for a full hour, you'd use 12V x 60A x 1hr = 720Wh, or .7kWh so roughly a 2% pack loss per hour. Of course, there will be some DC-DC conversion, but close enough.