Discharge while plugged in

[Deleted member 22486]

Has anyone run into an issue where you set the maximum charge to 80% and you leave the truck sit for several days only to find out that the SOC has dropped by 3% or 4% and the truck isn’t topping it off. I’ve had three Model Y’s, and I’ve never experienced this but the service center says this is normal. The truck is going to sleep and sentry mode is turned off, but it just seems since it’s plugged in it should keep it somewhere near the targeted state of charge.

 

[no%X#XMVk65v#cq]

Yes it's kind of annoying. At some point it will top up again. Not sure where that line is, but mine topped up several times while sitting a few weeks in very cold weather. You can always just bump it 1% manually to start it going as well.

 

[mongo]

Has anyone run into an issue where you set the maximum charge to 80% and you leave the truck sit for several days only to find out that the SOC has dropped by 3% or 4% and the truck isn’t topping it off. I’ve had three Model Y’s, and I’ve never experienced this but the service center says this is normal. The truck is going to sleep and sentry mode is turned off, but it just seems since it’s plugged in it should keep it somewhere near the targeted state of charge.

It's normal and the SOC will be reported lower if the pack is cold.
Says 75%, is really 78%, will charge by 77% or so...

 

[koolio]

It's normal and the SOC will be reported lower if the pack is cold.
Says 75%, is really 78%, will charge by 77% or so...

If you’re in a cold weather environment, this is most likely the answer.

 

[Deleted member 22486]

If you’re in a cold weather environment, this is most likely the answer.

Yeah, I know what you’re talking about there. Typically you get that little blue mark on the state of charge indicator when it’s cold and the SoC goes down until you precondition and or get the battery up to temperature in someway.. This isn’t that. Happens independent of temperature. Interestingly enough, I have a model Y performance that sits right next to the truck, so I can compare and contrast how they react to sitting for any length of time, whether it be cold or warm out. Understanding they have different batteries and different battery technologies. I’m just trying to figure out whether this is normal for a cybertruck or not

 

[koolio]

Yeah, I know what you’re talking about there. Typically you get that little blue mark on the state of charge indicator when it’s cold and the SoC goes down until you precondition and or get the battery up to temperature in someway.. This isn’t that. Happens independent of temperature. Interestingly enough, I have a model Y performance that sits right next to the truck, so I can compare and contrast how they react to sitting for any length of time, whether it be cold or warm out. Understanding they have different batteries and different battery technologies. I’m just trying to figure out whether this is normal for a cybertruck or not

Gotcha.

I haven't noticed anything different on mine (and we also have a 2024 Model 3 in the same garage)...but ever since we got Tesla Solar last March 92024) we don't keep our Teslas plugged in all the time (as we'd rather have the solar fill up the Powerwall before charging on solar). The one thing I have noticed when it's super cold is the CT batteries show the 'cold' indicator a lot sooner than the Model 3's 2170 batteries.

 

[Deleted member 22486]

Gotcha.

I haven't noticed anything different on mine (and we also have a 2024 Model 3 in the same garage)...but ever since we got Tesla Solar last March 92024) we don't keep our Teslas plugged in all the time (as we'd rather have the solar fill up the Powerwall before charging on solar). The one thing I have noticed when it's super cold is the CT batteries show the 'cold' indicator a lot sooner than the Model 3's 2170 batteries.

Good data- thank you.

 

[DJAlan2000]

Gotcha.

I haven't noticed anything different on mine (and we also have a 2024 Model 3 in the same garage)...but ever since we got Tesla Solar last March 92024) we don't keep our Teslas plugged in all the time (as we'd rather have the solar fill up the Powerwall before charging on solar). The one thing I have noticed when it's super cold is the CT batteries show the 'cold' indicator a lot sooner than the Model 3's 2170 batteries.

The Powerwalls should have priority to charge off the solar... Mine (also installed last year) will show my car as being plugged in, but then says something like "prioritizing powerwall"...

BUT, your car(s) need to be setup and have "charging on solar" turned on. Then it SHOULD push any solar to the HOUSE first, POWERWALL second, VEHICLES third and GRID fourth... BUT, the charge settings need to be setup for the "Charge to XX% (I put in 40%) from ANY source and continue to 80% when solar is available"... If you have the first number set above the current state of charge, then it's going to grab from either the Powerwalls OR grid (or sometimes both) until it gets to that min. number... THEN it goes into the "Charging on solar" (and the little cable turns 'yellow' when charging instead of 'green')...

I keep mine set up with 40/80 and have my system on "Time based control" until 9pm every day (time that it goes into 'Mid Peak' for SCE) from 'Peak' which is from 4pm to 9pm... I WANT to sell my excess solar, but at night I want to use my powerwalls for power...

This setup has given me the lowest 'costs' overall... Now our home doesn't use ANY "E" from the grid during PEAK prices, but does SELL power to SCE from the Solar AND Powerwall during 'peak'... Then it switches to allow the house and cars to charge from grid (to car's min.) when the prices are lowest and when the sun comes out, we switch back to Time Based and use the sun to recharge the Powerwalls and shove excess to the cars and/or grid...

So far, we have generated almost enough (during WINTER mind you!) to keep the car/truck charged up to at least 60% AND run the house AND send some to the grid as 'credits'... Most of our 'bills' have been in the negative range (-$23 last month!) so we will end up only having to pay all those fees and taxes you have to pay no matter what...

You can also set it to "Self Powered" rather than "Time Based Control" - this also prioritizes the Powerwall vs anything else...