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7 mile drop with fan on level 1

Posted: Thu Aug 10, 2017 9:01 pm
by Supersleeper
Seems the fan in the console isn’t as efficient as I’d hoped. Really, I just want some circulation once and a while, but I often crack the windows instead to prevent from using the console fan. That had me thinking though, (trouble). USB fans are in the kilowatts range and should be much more efficient. I’m going to do some expiramentation with this, and will post my findings. There are some oscilating models too.

Re: 7 mile drop with fan on level 1

Posted: Thu Aug 10, 2017 9:55 pm
by cwerdna
How are you determining this "7 mile drop"? If it's a change in the GOM, well, there's viewtopic.php?p=271853#p271853.

I can only guess you're using auto and/or have the AC, heater or defrost on. I almost never use auto.
Supersleeper wrote:USB fans are in the kilowatts range and should be much more efficient.

Kilowatts? I don't even have any floor standing or box fans that draw 1 kW. That's nuts.

USB power is often only 5 volts at 1 amp to maybe 2.4 amps --> 5 watts to 12 watts. Some USB AC adapters can't even put out 1 amp at 5 volts.

Re: 7 mile drop with fan on level 1

Posted: Fri Aug 11, 2017 8:48 am
by estomax
is your ac / heat on auto or something ? you should notice no change in range with just the fan running, it draws 50-100 watts at most. even if you look at the power meter on the touch screen as you move the fan from low speeds to high you can only see the power usage tick up every so slightly.

Re: 7 mile drop with fan on level 1

Posted: Fri Aug 11, 2017 11:53 am
by Supersleeper
Yeah, I'm still learning. All I did was take it off auto, and put the fan at the first level. Not sure if the heat was on. I need to research that. That said, however to cwerdna's point, USB powered fans are still at a fraction of the power draw of the in dash fan. I still think it's worth toying with, but will definitely play with the settings to make sure the heater is off and whatnot. I certainly didn't feel any heat out of it, but I'm sure any amount would cause a significant draw.

Re: 7 mile drop with fan on level 1

Posted: Fri Aug 11, 2017 1:35 pm
by LeftieBiker
You need to start ignoring the range estimator. It is of limited use in general, and of no use at all in this situation. It will usually drop by 2 miles if the heatpump heater or A/C is engaged, but not 7 miles. The blower alone does not appreciably affect range. Maybe if your car has the heatpump and you had both heat AND A/C running at once...

Re: 7 mile drop with fan on level 1

Posted: Sat Aug 12, 2017 2:33 am
by garsh
Turning the fan on means you were also turning climate control on. The Leaf likes to heat up the coolant in anticipation of needing to supply heat - even if you keep temperature at the low setting. So most likely, the large power draw you're seeing is due to the car heating up the coolant.

I've actually performed one of these modifications so that I can turn off the heater completely. You might want to consider it too.

Re: 7 mile drop with fan on level 1

Posted: Sat Aug 12, 2017 2:39 am
by LeftieBiker
Whether or not the climate control comes on with the blower depends on the year. From 2013 on, the heat is controlled by a separate button. As usual, the OP didn't give a year or model.

Re: 7 mile drop with fan on level 1

Posted: Sun Aug 13, 2017 7:30 pm
by Supersleeper
LeftieBiker wrote:Whether or not the climate control comes on with the blower depends on the year. From 2013 on, the heat is controlled by a separate button. As usual, the OP didn't give a year or model.


Yeah, just learned that. I installed a latching switch and resister to fool the car into thinking the heater is at temp. Mine is a 2011 SL.

Anyone know if the heater is powered by the 12v or drive battery? I'm also considering upgrading my 12v solar panel in the rear. That thing is useless, and I have a 20w panel I can use to replace it.

Re: 7 mile drop with fan on level 1

Posted: Sun Aug 13, 2017 7:39 pm
by cwerdna
Supersleeper wrote:Mine is a 2011 SL.

Anyone know if the heater is powered by the 12v or drive battery?

Ahh, you have the power pig slow to heat water-block heater then. It's powered by the big battery. No way it can be powered by the 12 volt.

Re: 7 mile drop with fan on level 1

Posted: Sun Aug 13, 2017 11:32 pm
by Supersleeper
cwerdna wrote:Ahh, you have the power pig slow to heat water-block heater then. It's powered by the big battery. No way it can be powered by the 12 volt.


Bummer. Well, I'll experiment with my own 12v mods. I've got a couple of ideas to make a low-wattage ceramic heater for my feet.