Actual charging time always less than predicted by LEAF?

[smilingbee]

Example: Our LEAF tells us that it will take 3:30 to get to 80% charge. I plug-in our Blink EVSE and the LEAF charge timer is set to start at 12AM. The next morning I go to unplug the LEAF, and the Blink tells me the last charge was completed in 2:21.

What explains the discrepancy between the LEAF's predicted 3:30 to reach 80% and the Blink reporting that it only took 2:21? This has happened several times now, with the Blink reporting charge completion times between 2:12 and 2:21.

 

[TonyWilliams]

Example: Our LEAF tells us that it will take 3:30 to get to 80% charge. I plug-in our Blink EVSE and the LEAF charge timer is set to start at 12AM. The next morning I go to unplug the LEAF, and the Blink tells me the last charge was completed in 2:21.

What explains the discrepancy between the LEAF's predicted 3:30 to reach 80% and the Blink reporting that it only took 2:21? This has happened several times now, with the Blink reporting charge completion times between 2:12 and 2:21.

It's as crazy as the Guess-O-Meter !!! Who knows? I know in Japan, they use 100 volt and 200 volts, instead of 120 and 240. That may have something to do with it.

 

[JohnOver]

Happens to me too. Carwings predicts 3:30 and it takes 3 hours. I think it has to do with what voltage you have. I'll bet it's figuring the time based on the worst-case of 16 Amps at 208V, but since we are charging at 240 it takes less time.

Let's see, 208*16*3.5 = 11.65 kWh & 11.65 kWh takes 3:02 at 240V & 16A. Sounds right...

 

[GaslessInSeattle]

I see this too. generally pleasantly surprised at how fast it goes.

 

[LEAFfan]

A few days ago, I was down to 5 bars (from 10). The car showed it would take 3 hours to 80% and the Blink only took 1 1/2 hours! Even from 6 bars, it usually takes about 2 hours, so I believe I had a little help that day.

 

[planet4ever]

I have my timer set to end 80% charging by 7 AM, with no start time set. My actual ending times have ranged from 3:47 to 4:13 AM. Talk about conservative!

Ray

 

[lkkms2]

Same here. I was testing the Leaf charger time settings with no start time, only an end time at 5 am. (So that I would not always be starting exactly at 12:10 am every day - no other EVs in my neighborhood that would add a load at the same time, but just wanted to see how it would work) The Leaf actually started charging around 11 am (outside my superoff peak of midnight.) I had to change the end time to 6:30 am so that it would start after midnight. In both occasions that actual charging time needed was only a few hours. Very conservative estimates. I wonder if Nissan could confirm if this is just being conservative or based on calculations with different charging voltages in Japan as you speculate/calculate. hmm.

 

[Volusiano]

I think it's better for Nissan to be conservative and have owners pleasantly surprised that it gets done sooner than making a more accurate estimate but have owners be mad if something causes it to take longer.

 

[johnr]

I've recently started noticing the same thing. It does take less time to recharge than indicated. I wonder why?