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I do use one of the smaller Jackery battery for this purpose. It fits within the left well just below the 12v socket, and it gets charged by the 12v. This gives me few hours (worst case) of "buffer time". But unfortunately, I do need to make sure DC or AC out button is on at the very beginning, and also if I happen to drain the battery down to 0%.Another solution may be to use a battery pack that plugs into the accessory port and plug into that. Not sure if they work like a UPS or if they need to be manually turned on though. Might be worth a look.
Good to know. We’ll be doing this in a few weeks.Looks like I may need to correct this. I was camping over the weekend and using the 12 volt cooler. The first two nights all was fine, although on the third one I disabled sentry mode to save battery. When I woke up the cooler was also off. I tested this a little more when I got home and it looks like when sentry mode is off, the 12 volt outlet in the rear does indeed shut off when the car goes to sleep.
Maximum low voltage power is ~2kW or slightly below 2kW. Low voltage power comes from the onboard DC-to-DC Converter (part of the Power Conversion System). The only time the low voltage battery (formerly known as the 12V battery) provides power is when the Tesla vehicle is parked and enters Sleep mode. The low voltage battery is a 15.5V lithium battery rated at ~7Ah, so it is not going to provide a lot of power on its own for long periods of time. Otherwise, when not in Sleep mode, the Tesla Model Y remains in Standby mode* where the Tesla Model Y computers and other essential low voltage system. continuously draws between 220W and 290W (depending on model year and HW configuration). You could probably draw ~1.7kW from the low voltage accessory ports (formerly 12V accessory ports), combined for both accessory ports.Question,
it's just for power outtage planning. I have the LIFEPO4 battery (Ecoflow Delta Pro) was power outtage generator which have 12V cig inputs. Supposingly if the battery is low and I'll charge it via cig adapter on model y, would I need to worry about draining 12V battery from my model y if I draw up 3.6KWhr from it?
I believe I read that if the 12V battery is low, Model Y will recharge it from HV. Looking for confirmations and experiences you guys have before purchasing a long cig extension cable.
Maximum low voltage power is ~2kW or slightly below 2kW. Low voltage power comes from the onboard DC-to-DC Converter (part of the Power Conversion System). The only time the low voltage battery (formerly known as the 12V battery) provides power is when the Tesla vehicle is parked and enters Sleep mode. The low voltage battery is a 15.5V lithium battery rated at ~7Ah, so it is not going to provide a lot of power on its own for long periods of time. Otherwise, when not in Sleep mode, the Tesla Model Y remains in Standby mode* where the Tesla Model Y computers and other essential low voltage system. continuously draws between 220W and 290W (depending on model year and HW configuration). You could probably draw ~1.7kW from the low voltage accessory ports (formerly 12V accessory ports), combined for both accessory ports.
* Sentry mode cause the Tesla Model Y to remain in Standby mode, never enter Sleep mode. That is primarily why Sentry mode consumes 6% to 7% of the high voltage battery charge over 24 hours.
What are you trying to do here? Taking one battery and using it to charge another battery and taking that to charge another battery will not result in using only 5% of your car’s battery. A lot will be lost along the way.Thank you @jcanoe ! This is valuable information to me.
Let me play back and make sure I understand what you said fully.
1. It's a 2023 Model Y, and I'll have it on Sentry Mode during extended outtage so that the car does not go to sleep mode.
2. The ecoflow battery/generator will plug in to charge via Model Y's cig charger, set to 100W drawing max (15.5V * 7)
3. Assuming drawing a total of 3.6KWhr max over a period of time (that's probably 5% of MY main battery).
Because there is a Power Conversion System in place where LV battery gets its power from HV battery, I shouldn't need to worry about Model Y unable to start afterwards like gas cars right?
Thank you again!
The Tesla Model Y Owner's Manual states that the low voltage accessory port is suitable for devices that draw up to 12A continuous (16A peak), the same would apply when using both low voltage accessory ports (12A continuous and 16A peak, total) amperage draw.Thank you @jcanoe ! This is valuable information to me.
Let me play back and make sure I understand what you said fully.
1. It's a 2023 Model Y, and I'll have it on Sentry Mode during extended outtage so that the car does not go to sleep mode.
2. The ecoflow battery/generator will plug in to charge via Model Y's cig charger, set to 100W drawing max (15.5V * 7)
3. Assuming drawing a total of 3.6KWhr max over a period of time (that's probably 5% of MY main battery).
Because there is a Power Conversion System in place where LV battery gets its power from HV battery, I shouldn't need to worry about Model Y unable to start afterwards like gas cars right?
Thank you again!
that seems to be the same for me......my new cooler stays on when I turn everything off.....I thought I had to keep the dog mode, camping mode and / or the cabin protection on in order to have the trunk dc outlet powered.......I am trying to figure out what is going on...I've read that the new Model Ys with the 16 volt battery keep the rear 12 volt outlet powered at all times, but I haven't seen an actual source for that. The current owner's manual states that:
I bolded the relevant section. It states the 12 volt outlets are powered up whenever the vehicle is awake, and that the vehicle is awake when the 12 volt outlets are in use. Rather recursive, but all I know is that I can leave my 12 volt cooler plugged in 24 hours a day and things stay cold. No sentry or camp mode being used.
What year/month did you get your Y delivered?that seems to be the same for me......my new cooler stays on when I turn everything off.....I thought I had to keep the dog mode, camping mode and / or the cabin protection on in order to have the trunk dc outlet powered.......I am trying to figure out what is going on...
so many say that power is shut off after car sleeps....but I am monitoring thru teslafi and it shows everything is off but I check cooler is on....dont know what to do or know if something is wrong...I do not want my 12v battery to go bad
Can't use it as a freezer though...YETI cooler with ice = it will last a week.
As long as the Tesla Model Y is awake and in Standby mode or Camp mode the low voltage system is powered via the power conversion system (PCS) and the DC-to-DC Converter. The low voltage system used to be a 12V system but in newer Tesla vehicles with the lithium starting battery the low voltage system operates at 15.5V to 16.0 V. Any accessories need to be rated for 16V. The low voltage lithium starting battery only runs the Wi-Fi and BT modem, door locks and car alarm (Not Sentry Mode) when the Tesla vehicle is in Sleep mode. The low voltage lithium starting battery will power up the Tesla vehicle's computer so that the power conversion system (PCS) can provide low voltage power.My 2024 shuts down the accessory power after less than ten minutes of exiting the vehicle. Accessories that were drawing power go dead.
As mentioned, camp mode with no A/C and minimal fan will stop sleep mode happening.
Mind the draw on the accessory socket. It's not a lot of power and for good reason. The battery is tiny. Charging it up and discharging it round and round and round is going to give it a short life.
Now I am wondering how much of that applies to older lead acid actual 12V systems?As long as the Tesla Model Y is awake and in Standby mode or Camp mode the low voltage system is powered via the power conversion system (PCS) and the DC-to-DC Converter. The low voltage system used to be a 12V system but in newer Tesla vehicles with the lithium starting battery the low voltage system operates at 15.5V to 16.0 V. Any accessories need to be rated for 16V. The low voltage lithium starting battery only runs the Wi-Fi and BT modem, door locks and car alarm (Not Sentry Mode) when the Tesla vehicle is in Sleep mode. The low voltage lithium starting battery will power up the Tesla vehicle's computer so that the power conversion system (PCS) can provide low voltage power.
I wonder if the charge line on the 7 pin trailer plug stays active in sentry mode.As long as the Tesla Model Y is awake and in Standby mode or Camp mode the low voltage system is powered via the power conversion system (PCS) and the DC-to-DC Converter. The low voltage system used to be a 12V system but in newer Tesla vehicles with the lithium starting battery the low voltage system operates at 15.5V to 16.0 V. Any accessories need to be rated for 16V. The low voltage lithium starting battery only runs the Wi-Fi and BT modem, door locks and car alarm (Not Sentry Mode) when the Tesla vehicle is in Sleep mode. The low voltage lithium starting battery will power up the Tesla vehicle's computer so that the power conversion system (PCS) can provide low voltage power.
There’s no difference in this regard as it relates to the different LV systems.Now I am wondering how much of that applies to older lead acid actual 12V systems?
I got my new 2024 Model Y delivered on 22 Mar 24.....as long as the cabin overheat protection is working, power to trunk is on......If dog mode or camp mode is on, you'll have dc power in the back outlet.....I believe the same goes for Sentry mode becasue the car is awake.......BUT, when car goes to sleep, all power is turned off at all sockets, front console and rear trunk......see my post for the summary I did earlier....Hope this helpsWhat year/month did you get your Y delivered?
Mine does turn itself off, so I had to buy a small battery that connects between the car and the fridge, just to gain the ability to keep it on for an extended period of time without using camp/sentry/etc mode.
We travel (and camp) quite a bit, and in some situations, we need to conserve the car battery. So ideally, I didn't want to enable sentry or camp mode unnecessarily.I got my new 2024 Model Y delivered on 22 Mar 24.....as long as the cabin overheat protection is working, power to trunk is on......If dog mode or camp mode is on, you'll have dc power in the back outlet.....I believe the same goes for Sentry mode becasue the car is awake.......BUT, when car goes to sleep, all power is turned off at all sockets, front console and rear trunk......see my post for the summary I did earlier....Hope this helps