DougC
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Location: Between Flint and Detroit, Michigan

Best state for non-use

Sun May 03, 2015 4:13 pm

What is the best state to leave the car out of use of 4-6 weeks?

Half battery charge with trickle charger on the aux battery?

Half charge only?

Leave it connected to the level 1 charger?

This will be in the summer temperatures.

PV1
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Re: Best state for non-use

Sun May 03, 2015 4:57 pm

Definitely wouldn't leave an EVSE plugged into the car. I'd say half charge or less, probably 5-6 bars. I suppose a trickle charger on the 12 volt wouldn't hurt.
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JoeS
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Re: Best state for non-use

Sun May 03, 2015 6:28 pm

PV1 wrote:Definitely wouldn't leave an EVSE plugged into the car. I'd say half charge or less, probably 5-6 bars. I suppose a trickle charger on the 12 volt wouldn't hurt.
Agree, with the "trickle" charger being a modern smart 'float' charger (like a Battery Tender) and not an antique trickle charger which would murder the 12v battery in that timeframe.
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
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DougC
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Joined: Mon Mar 23, 2015 11:26 am
Location: Between Flint and Detroit, Michigan

Re: Best state for non-use

Mon May 04, 2015 8:06 pm

Thanks for the replies

will the aux battery hold up for that long or is there a big parasitic load? My other car will not go for more than 2 weeks without draining the battery

PV1
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Re: Best state for non-use

Tue May 05, 2015 5:27 am

I had no problem after a week, but I don't know about 4-6 weeks. The issue with the i-MiEV is, if the 12 volt goes flat and can't start the car, you'll get the EV warning light and it can only be cleared with the programmer tool the dealers have (a few members here have it, too). Better safe than sorry.
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JoeS
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Re: Best state for non-use

Tue May 05, 2015 8:23 am

DougC wrote:Will the aux battery hold up for that long or is there a big parasitic load? My other car will not go for more than 2 weeks without draining the battery
It all depends upon the state-of-health of your 12v battery, which is probably unknown. If a dealer let the car sit on the lot unstarted for a few months and let the battery go dead and then jumpered it, it has probably sustained significant sulphation damage that I wouldn't trust it sitting for more than a couple of weeks. Our 12v batteries actually live a very benign and stress-free happy life if the car is used on a daily basis.
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

DougC
Posts: 29
Joined: Mon Mar 23, 2015 11:26 am
Location: Between Flint and Detroit, Michigan

Re: Best state for non-use

Fri Jul 03, 2015 12:27 pm

Returned after 5 weeks with the 12v battery on a harbor freight battery tender. Traction battery still at the same 1/2 level that I left it. All is well

JoeS
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Re: Best state for non-use

Fri Jul 03, 2015 12:58 pm

DougC wrote:Returned after 5 weeks with the 12v battery on a harbor freight battery tender. Traction battery still at the same 1/2 level that I left it. All is well
Good, glad it worked out for you. BTW, I normally would not entrust my i-MiEV's 12v battery to one of those Harbor Freight "Automatic Battery Float C h a r g e r" (had to space that last word because this website alters that word and links to something else - :x ) - I bought a dozen of them and every single one had a different voltage that it 'regulated' to (I returned most of them). In your case, no harm done since, unlike Lithiums, the 12v lead-acid battery is very voltage tolerant. Unrelated, now that you're back, don't forget to check your tire pressures.
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
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Re: Best state for non-use

Fri Jul 03, 2015 3:50 pm

Our 3 year old car has been sitting now for 5 weeks - This thread got me to thinking maybe I ought to go put it in the 'Ready mode' so the traction battery could top up the 12 volt battery. It 'started' just fine and I let it sit in ready for about 5 minutes. Think I'll do this once every 5 or 6 weeks just to keep things topped off. The traction battery is sitting at 4 bars

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

tigger19687
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Re: Best state for non-use

Sat Jul 04, 2015 9:56 am

Good thread. Good to know that if I use it every now and again during the Winter my 12v should be good
[size=85]- Linda
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- 2014 Toyota Prius C, for the Son

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