ChargePoint at 7kW ~weekly. Changed battery last Summer/Fall after wiring harness issue and car sitting many months. Manufacture date 07/18, so battery lasted 4yrs and probably would have gone longer.
Poll to see correlation between L2 rate and 12v
So, the recent posts about charging at 16 amps made me think… Not only does the high voltage battery charge for about twice as long with 32 amp charging, the 12 volt(s) does too. So I made a poll. To make it easy I put the cutoff basically at more than 20 amps at 240 volts (more than 5Kw) or 20 amps or less (less than 5Kw). As for the number of years, let’s use date of manufacture instead of date of purchase. You can find the date of manufacture on the black sticker after you open the driver’s door. Please only vote if your car is more than 3 years old.
For me I charge at 16 or 20 amps at 240 volts and I preemptively changed the starter battery at over 4 years. Still on the original aux battery.
For me I charge at 16 or 20 amps at 240 volts and I preemptively changed the starter battery at over 4 years. Still on the original aux battery.
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I have had the car just mor than 3 years - charged at 7KW on a >32amp circuit. My aux battery has just starting throwing up the 'reduced brake' message to indicate it is failing. Jag USA will have a replacement a week Thursday... No driving till then to be on the safe side.
the systems are two separate things. L2 charging has nothing to do with the 12v system
@kort6776 According to the Bluetooth battery monitors on my 12v batteries, the 12v is charged the entire time the HV battery is charged. It stops charging the 12 volt batteries when the HV battery stops charging. Since I spend probably three times as much time charging as driving (also when the 12v batteries are charged) it seems like it would have a bigger impact on the 12volt batteries.
@Proxy did you get a gateway software upgrade at the dealer. I used to have 12v issues a couple of years ago, and they upgraded the module in charge of controlling the 12v. Now it is able to keep it in healthy state all the time, charging or not, running or not, sleeping or not.
@dernotte I have probably not received that update. I will ask to have all modules updated next time it is in for service. First I need to get past 16.2.
I don’t think charging speed should affect the 12V battery. But I could be wrong. I would assume that the 12V batteries charge at the same rate regardless of the traction battery charging speed.the systems are two separate things. L2 charging has nothing to do with the 12v system
@Slam08 I agree about the rate. I assume the 12 volt batteries charge at the same rate and therefore if the car spends twice as much time charging the high voltage battery, it spends twice as much time charging the 12v batteries. So, same rate for twice as much time.
Perhaps.@Slam08 I agree about the rate. I assume the 12 volt batteries charge at the same rate and therefore if the car spends twice as much time charging the high voltage battery, it spends twice as much time charging the 12v batteries. So, same rate for twice as much time.
But I would think the 12V battery charging has a negligible effect on the large traction battery.
But I’m not an electrician!
I use the 120vac about 95% of the charging time. Which means my 12volt batteries are charging about 60 hours a week for your theory (not including the charging the 12v batteries get when the car is running). I had to replace both my 12volt batteries before they were 3years old.
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