jjeff wrote: ↑
Mon Feb 15, 2021 8:37 am
jjeff wrote: ↑
Sun Feb 14, 2021 8:03 am
I plugged it in at 8am and will note the SOC% when it stops charging, I'll leave it plugged in and then recheck the SOC% tomorrow morning to make sure the SOC% is the same and hasn't dropped due to the battery heater which I'm guessing will be on all day today and tonight(-18F tomorrow morning forecast and high -4F today).
On another note, I plugged in my '13S yesterday evening and it charged to 100% and stopped charging, I left the EVSE hooked up and like my '12SL I'm guessing the battery heater ran all night long. When I checked it's SOC at 8am this morning it was still 100% which tells me the car must have started charging again last night as otherwise it would have dropped SOC, that's a good thing.
Well I think I've discovered something and like basically everything else about my '12 It's a negative
First, while I plugged it in yesterday morning at 8am it wasn't until about 2pm it stopped charging and went to sleep, 6hrs to go from 65% SOC to 85% which is where it finally stopped, 20% in the summer would have taken a little more than an hour at the 240v @ 16a I fed it. Note I didn't note the charging speed but I'd guess is was very low to have taken so long. Regardless at 2pm Sunday SOC was 85% and most of the time I looked after that the 300w battery heater was on(single driver's side blue light flashing on the dash). Note I have a LeafDD display always hooked to the OBDII port and every time the heater ran and light flashed, my LeafDD powered up and I could see the SOC without powering on the car. My EVSE charge light also flashed like it was actually charging but it's my belief it was not charging at all, wish that EVSE had a display but just the lights. Anyway one reason I believe it did NOT actually charge as this morning at 6am, 16h after I plugged it in, my SOC was 75%
this tells me my fear was correct, once the '12 stops charging it does NOT wake up to charge again, even if the battery warmer draws down the battery! You'd need to cycle the j1772 or possibly push the timer override button to get it to charge. Note I don't have a timer set so maybe that wouldn't work but thinking it through maybe a timer would solve this issue at at the specified time it might start charging if the battery were not full? Note this is NOT how my '13 works, it works better IMO in that if you leave the EVSE plugged in the car will automatically wake up if the heater draws down the traction batter, another + for post '12 Leafs.
One last follow-up as I don't believe we're going to have any more sub-zero days this year(and that's just fine with me!). I kept my '12 plugged in for a couple more days past above and I'm happy, for whatever reason the SOC never dropped below 78% even though we had several sub-zero nights and I could see the batter warmer was on. It must have restarted charging the battery but I don't know why it didn't go up to the low low 90s which is normally where it stops. Maybe if I still have the vehicle next year I'll experiment with a daily timer to see if that helps maintain a higher SOC, otherwise I'm just going to chalk it up to another quirky feature of the '12 as it relates to charging.
2012 SL purchased used 2/'16
2013 S w/QC purchased new
Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
Zencar 13, 20, 30a L1/L2 portable EVSE
GE Durastation 30a