AlanSubie4Life
Efficiency Obsessed Member
The first paragraph of “Battery Care” on that page says approximately 1% per day discharge, and even gives an example of leaving a car unplugged at an airport for two weeks and having approximately 14% discharge. How is that “not quantified, for obvious reasons”? I think your obsession about the vampire drain is blinding you to Tesla actually giving a number and cautioning people about it.
You are correct. I have read this page before, but when I glanced this morning didn’t read that far (read down to that paragraph).
I stand corrected; it absolutely is quantified. Kudos to Tesla for that, I guess. I know Tesla is brilliant and all, but I would really like to be able to control the drain in certain situations (see above), and I would like it to be better in general.
I have a hard time believing that an average drain of 20-40W does anything significant for HV battery maintenance (though that is what Tesla says it is doing!). Obviously might maintain the AGM battery with the battery float charger due to all the parasitic loads on it. So in that sense it is battery maintenance - but that’s not what we really care about (someone elsewhere posted that 12V battery maintenance is better on the 3 (and includes an always-connected float charger to reduce contactor wear???) so that is good, though I have not seen the source).
Re: Obsession - I suppose you could make the argument that I am obsessed. But actually I just want to understand it, and I don’t take everything Tesla says at face value.
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