Vampire Drain challange

[Howard S]

OK, so here is my back of the napkin or should say paper of my 17 day test between my 2022 Rivian R1S with the old large battery rated 131 kWh, my 2018 Tesla model 3 with a 75 kWh battery and my 2022 Ford lightning Pro with standard 98 kWh battery. So while I was working on my house, I didn’t drive any of these vehicles for 17 days starting on April 6 and ending on April 23. All vehicles were parked in my driveway and sometimes walking by them they would turn on or off. But I think it’s pretty equal settings. Hopefully you can understand my scratching. The Rivian started at 72% and at the end of 17 days was down to 53% so that’s 19% loss which is equivalent of about 52 miles. The Tesla started at 50% and ended up at 44% equaling a 6% loss or about 18 miles of range. Unbelievably the Ford lightning lost only one percent which is about 2.3 miles of range but during the test the range count went from 202 miles to 206 then down to 195. So I’m assuming there were some adjustments to the range looking at the mile o meter. Doing some of the calculations at the cost of my energy which is about $.30 a kilowatt hour in Los Angeles. The Rivian would cost me approximately $144 a year the Tesla model 3 $28 a year and the Ford $12 a year. The only kicker I can add to it is a Rivian would probably have done worse because I was testing out a solar panel connected to the OBD port, which may have added some energy back in. The reason I will not give it too much credence is because it’s behind the windshield and underneath a canopy and we’ve had some cloudy weather so if I didn’t have it on there, i’m assuming it would be even worse. I do plan to try and test it when I leave it outside with the solar panel fully exposed. People have said that helps a lot.

I guess the take away is the Ford barely sips the blood. The Tesla takes a little cup of it every now and then and the Rivian slurps it up like there’s no tomorrow just like my Cathoula dog.

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[SpaceEVDriver]

That 1% change for the Lightning is likely not vampiric loss but rather just related to temperature fluctuations. I’ve left both the Lightning and the Mustang for several weeks with a total 0% change in battery state of charge.

The use of solar on your R1T’s OBD port won’t add to the high-voltage battery, but might slow the discharge of the low-voltage battery, which might decrease some of the vampiric loss.

 

[SMMD]

I posted this previously on another thread: I left my truck idle for over 90 days, not plugged in, while taking an extended trip. Somewhere between 14 days and 28 days idle, it went into deep sleep, as noted on FordPass. Following Ford’s recommendation for extended idle periods, I left it at 50% SOC. When I returned, it started right up, and the HVB SOC was 49%. I was impressed that in 90 days, it only lost 1%. There was no problem with the LVB.

This suggests the drain on the Lightning is much less than you calculated In your shorter experiment.

 

[RickLightning]

Rivian has Gear Guard, Tesla has Sentry Mode. There's your loss.

 

[Howard S]

Rivian has Gear Guard, Tesla has Sentry Mode. There's your loss.

Both were turned off automatically at my house. There is a setting to shut it off at different locations.

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