My Ego (electric lawn-care tools) batteries will self discharge
themselves down to 30-50% SOC after a month if you leave them charged.
(they call it "Storage mode").
So I can certainly understand a car deciding to keep the battery
"stored" within the 20-80% SOC range for battery health....although I'm
surprised they do it after only 2 days. (Personally, I think I'd pick 3
days, so that if you came home, charged on a Friday and left it over the
weekend it would still be ready at 100% on Monday morning.)
I'd keep an eye on it and make sure it doesn't keep going down quickly
below 80% as time progresses, it might still be a bug and not a feature....
Jay
On 6/28/19 9:42 AM, Mark Hanson via EV wrote:
Hi folks
I checked the 12v battery last night, cool at 12.6v not sucking any amps so I
think the car decides to discharge the battery from100 to 80% if you let it sit
2 days or more. Seems like a waste of energy though.
Thanks Paul
That makes sense replacing the 12v battery as this appears to have gotten worse
over time. With old lead batteries (this has 5 years use mid old) the DC DC
converter tries to float charge the battery up to 14v but it won't go above 13v
so it just keeps pumping current in. I'll check if the battery is hot, I think
it should after sucking up 7Kwh in 24 hours. My Honda Insight went goofy,
blinky dash lights, sputtering engine and found out it was the old 12v battery
that I thought would never go bad because it doesn't start anything or supply
heavy loads. I'll let you know if that's what it was. Thanks Lee for your
help and on the goofy horn. Hope the Chevy Bolt doesn't have similar problems.
For some reason I couldn't charge from the CCS fast charger, tried five
chargers and all said both my credit cards were bad so I went in the store and
bought a cookie on one and a coke on the other (health food). Just testing
since fast chargers are 28c per kWh so I just charge at home whe
r
e
the energy is free from the sun.
Have a renewable energy day
Mark
Sent from my iPhone
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