Mievo
Posts: 32
Joined: Mon May 15, 2017 2:49 pm
Location: Sanford, FL

Re: GENTLEMEN. I need help.

Thu Jun 29, 2017 4:37 pm

Okay much ire.

First, I discharge the battery when it's under half, but not low. It will charge full in 4 hours on the apartments 240V charger, so I plug in late and low. I don't want it sitting for 10-12 hours fully charged; more on weekends.

As far as using the patio 120V; 1) it costs, 2) it's not usually available to me. My neighbors get home before me.

Next; the ~25% A/C and ~50% heater penalty is guestimated from the change in range remaining. Not kidding, 25% for ac, 40-50% heater. I watch 54 RR go to 40-45. With the heater I'll sometimes see 30 turn to 15.

If I have to use AC, I use auto and turn the temp two clicks down after full blast to cool vents. I'd like to be able to post pics/vids, but have no computer at the moment.
"The Black Pearl" 2012 Mitsubishi iMiev, 34,9XXmi

Expert in the art of throwing a punch with back to the ground.

JoeS
Site Moderator
Posts: 3218
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: GENTLEMEN. I need help.

Thu Jun 29, 2017 8:55 pm

Mievo wrote:Okay much ire.
Nah, just giving you a friendly hard time ... around here, you have to be pretty precise with numbers.
Mievo wrote:First, I discharge the battery when it's under half, but not low. It will charge full in 4 hours on the apartments 240V charger, so I plug in late and low. I don't want it sitting for 10-12 hours fully charged; more on weekends.
While it's admirable that you don't want the car sitting fully charged, I can't help but wonder if there's a different scheme you might use, even if it involves getting up very early in the morning to start charging. I don't remember, but I guess you don't have a Remote, but how about rigging a mechanical timer?
http://myimiev.com/forum/viewtopic.php?f=7&t=129&p=2910#p2910
The point is to avoid unnecessarily exercising the battery.
Mievo wrote:Next; the ~25% A/C and ~50% heater penalty is guestimated from the change in range remaining. Not kidding, 25% for ac, 40-50% heater. I watch 54 RR go to 40-45. With the heater I'll sometimes see 30 turn to 15.
Tell you what, get a notepad and write exactly what the readings are: specifically, RR before and after AC or heater are turned on without the MAX button depressed, for various levels of charge. Take a few data points and convert to percentages and report back.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

Don
Site Moderator
Posts: 2455
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: GENTLEMEN. I need help.

Fri Jun 30, 2017 4:16 pm

I tested ours today. 91 degree day, 5 mile trip to the grocery, A/C top knob set about 3/4 ths of the way to cool, fan speed set near max (one or two clicks down) and bottom knob on recirculate - The same way the controls are usually set on an average day, quite comfortable in the car

Turning the A/C off, RR was 31 miles, turning it back on, RR was 27. This is pretty normal for us - I have always said that A/C usage costs us between 10 and 15% range, depending on the climate

True, heater use is much worse - I would estimate that at between 30 and 35% in typical usage

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

Mievo
Posts: 32
Joined: Mon May 15, 2017 2:49 pm
Location: Sanford, FL

Re: GENTLEMEN. I need help.

Fri Jun 30, 2017 9:19 pm

Challenge accepted. I will report all numbers come morning.
"The Black Pearl" 2012 Mitsubishi iMiev, 34,9XXmi

Expert in the art of throwing a punch with back to the ground.

Don
Site Moderator
Posts: 2455
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: GENTLEMEN. I need help.

Sun Jul 02, 2017 10:46 am

I did a slow, full recharge overnight. RR this morning is 74, with the A/C on it's 62 . Loss of 15% - Almost exactly the same as the previous 31/27 comparison

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

Jasmin
Posts: 8
Joined: Sat Sep 19, 2015 10:58 am

Re: GENTLEMEN. I need help.

Sun Jul 02, 2017 3:57 pm

Newbie to the miev, so curious about the full charge issue. I don't use my car every day, as I work at different sites and sometimes public transport is more convenient. So, what the deal with charging? I've been leaving the car full in case I need it in unforeseen circumstances. Is this risking harm to the battery, and if so what's the reccomended practice?

Don
Site Moderator
Posts: 2455
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: GENTLEMEN. I need help.

Sun Jul 02, 2017 4:47 pm

It's best not to leave is set fully charged - Some of us only do a full recharge every few weeks. We usually drive on 10 or 15 mile round trips, so recharging from around 3 or 4 bars up to 6 or 7 bars once or twice a week is all we need. If you're headed out on a longer trip and need a full charge, best to do the charging shortly before you leave . . . . the night before is OK - Recharging overnight so it finishes shortly before you leave is even better

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

JoeS
Site Moderator
Posts: 3218
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: GENTLEMEN. I need help.

Tue Jul 04, 2017 8:42 am

I had wondered about the discrepancy amongst our aircon readings, so I played with it for a few minutes this morning. Surprising to me, the RR reduction is independent of "coolth" setting, but is very susceptible to fan setting. Here are my readings this morning, with fan 'clicks':
FAN RR %Reduction
0 52 0
1 48 7.7
2 48 7.7
3 47 9.6
4 47 9.6
5 46 11.5
6 45 13.5
7 44 15.4
8(max) 43 17.3

Ambient temperature around 70degF. Since I normally keep my fan on very low, this explains why my percentage numbers were lower than Don's. (sorry about the list formatting)
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

Don
Site Moderator
Posts: 2455
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: GENTLEMEN. I need help.

Tue Jul 04, 2017 3:02 pm

JoeS wrote:Surprising to me, the RR reduction is independent of "coolth" setting, but is very susceptible to fan setting.
Very true - We discovered this early on. Apparently, it's how rapidly you carry the 'cool' away from the evaporator and not how cold you have it set to - Once the car gets comfy, turning the fan speed down does reduce the energy usage. In daily use, it's anywhere from 10 to 15% for us, more on hot days of course and more on short trips where the car never gets cool enough to turn it down

Like most things with this car, the energy use can be 'modified' to meet whatever needs you have. Many times on longer trips where we *think* we may be flirting with our max range, we drive slowly with little climate control use on the outbound leg and then we find we have plenty to cruise home at higher speeds and comfort levels

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

phb10186
Posts: 224
Joined: Fri May 13, 2016 12:58 am
Location: North London suburbs, UK

Re: GENTLEMEN. I need help.

Wed Jul 05, 2017 7:28 am

Don wrote:
JoeS wrote:Surprising to me, the RR reduction is independent of "coolth" setting, but is very susceptible to fan setting.
Very true - We discovered this early on. Apparently, it's how rapidly you carry the 'cool' away from the evaporator and not how cold you have it set to - Once the car gets comfy, turning the fan speed down does reduce the energy usage. In daily use, it's anywhere from 10 to 15% for us, more on hot days of course and more on short trips where the car never gets cool enough to turn it down

Like most things with this car, the energy use can be 'modified' to meet whatever needs you have. Many times on longer trips where we *think* we may be flirting with our max range, we drive slowly with little climate control use on the outbound leg and then we find we have plenty to cruise home at higher speeds and comfort levels

Don


Weird. I thought AC is either ON or OFF, and the fan speed is independent. High fan speed would take more cool air away from the condenser side, but in effect just prolong the duration that AC is ON. MAX AC just being yet another setting with both blower and rad fan on the fastest setting... so I guess this is just algorithm here, rather than anything else: ambient temperature + fan speed / known AC output to give some sort of factor.... can;t see how it can be anything else.
2012 I-MIEV Keiko Silver 11K
2010 Insight ES-T 43K
2001 Accord Type-V (F23 manual)
2009 Hornet CB600F
2008 SH300

Return to “General / Main Owners Forum”