Charge stats vs. energy usage 1 yr shows about 30% overhead

[Alan]

I’ve had my truck for just under 1yr. I live in the PNW where the weather is mild. The car is kept in the garage. I never use sentry mode or cabin overheat. I rarely precondition the car. I charge to 80%. Because the car seems to have a fairly high vampire drain I compared the 1 yr charge stats to 1 yr energy usage. Pictures attached. Are others seeing this much discrepancy? 4,797kwh charged vs 3,715kwh used.
thanks

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[GmP]

I see 27% overhead.
11 months, 11.5K miles.
Charged 5167, used for driving 4067: 1.27x
During these 11 months Sentry mode for maybe 14~21 days.
California Bay Area, so mostly mild, but some (relative) hot days with Cabin overheat protection (100F) on and during winter some cold days where I set temp to 68F 15 minutes before starting my drive. If I total days, maybe 30~45 days that either was used.

I park outside at home. Use a car cover since two months, to keep the heat out while parked at home. Charge to 80%, with few exceptions to 100% when starting a long drive, maybe five times.

Not sure if this is normal, to be expected.

I find it very hard to pinpoint when/where the non driving energy is used. If anyone has good suggestions, please let it known.

 

[Yeslak]

Here's a breakdown of potential non-driving energy usage:

Feature	Potential Impact	Notes
Vampire drain	Medium	Teslas lose ~1–3 miles/day idle, esp. if not in sleep mode. 11 months x ~30 days = 330 days → could be ~330–1000 miles (≈100–300 kWh).
Sentry Mode	High	Draws ~200–300 Wh/hour. 14–21 days = ~70–150 kWh.
Cabin Overheat Protection	Medium	Can use 1–2 kWh/day if triggered, esp. on hot days. 30–45 days = up to ~50–100 kWh.
Preconditioning / Remote Climate	Low–Medium	~1–2 kWh per 15 min cycle. If done 30–45 days = 30–90 kWh.
Battery thermal management	Always On	Tesla maintains battery temp for longevity. May draw more energy in hot/cold weather or frequent short trips.
Charging inefficiency	~10–15%	Energy lost as heat during charging process. Can add up to ~500–700 kWh in your case.

These combined easily add up to or exceed the 1100 kWh overhead.

 

[NICKEM]

I think you need to look at your driving pattern... the one in your photo shows over 600 Wh/mi (17 minutes) if you do that very often, your average Wh/mi will suffer.
My Wh/mi is just below 400 over the 11,500 miles, and I have sentry mode on most of the time and overheat at 90. My average trip is 20 miles one way to work (30 minutes with one stop at post office). I live in east Texas and made one long trip to Pennsylvania last year.

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