How long would it take to trickle charge a Cybertruck?

[Known-Background]

I’m just wondering, say I travel to a relatively remote location for the weekend and bring a mobile 110v charger. How much could I get per hour? Usually on my Y or 3 I get 5miles/hr. Does this mean the cyber truck will get like 2 or less? So where 10-15 hours of charging gets me 50-75 miles it would only give me 20-35? This is my biggest worry about the truck going semi-off the charging grid cause it might be a battery death trap!

One of the coolest perks is when I drive some place like a lake house to hang out for a weekend I leave with a full battery after trickle charging.

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[ÆCIII]

It depends on the Cybertruck's battery consumption when parked/idle. I don't know if anyone has measured that yet. I think the best test would be to let a Cybertruck set for about a week to ten days, checking the battery level before and after (with climate and Sentry off). This will also vary with temperature. But such a test would then give a good average consumption rate per hour.

Using napkin math your mobile 110VAC adapters for the UMC are either 15amp (1.8kW), or 20amp (2.4kW). If the Cybertruck uses more than 1.8kW or 2.4kW when parked/idle in a certain situation, then those options won't be enough to charge or maintain a charge, but they will prevent the battery from discharging quite as fast as when no charging source is connected at all.

These are tests I hope some of the owners on YT will do for us in the near future.

- ÆCIII

 

[Pops]

If the Cybertruck uses more than 1.8kW or 2.4kW when parked/idle in a certain situation

There is no way that is the idle consumption.

Realistically charging with a 120v outlet would take 75 to 100 hours to charge from 0% to 100%.

Maybe a 3mph charge rate to make it simple.

 

[cvalue13]

Maybe a 3mph charge rate to make it simple.

this is roughly what my Lightning gets on 120v (assuming it’s not cold weather)

based on battery size alone, I’d expect the CT to get roughly the same

For the offsetting drain in the CT, need some current owner (not in the cold right now) to give us an overnight / timed test

 

[ÆCIII]

There is no way that is the idle consumption.

Realistically charging with a 120v outlet would take 75 to 100 hours to charge from 0% to 100%.

Maybe a 3mph charge rate to make it simple.

Depends on what the temperature is, and if the BMS will use energy to keep the battery at any minimum temperature. That's why I said "... certain situation". It's not going to be 'simple'. That's why Tesla software displays a warnings on the screen urging owners to charge when the battery is low during cold temperatures. That's also why I used the word "If.."

I wasn't stating any consumption rate. I was stating what rate would make the 120VAC sources difficult or unable to keep up. I also said we needed to wait until we found out the actual consumption rate when someone can do a test. No point in declaring anything from an armchair until we have an actual test. Maybe some tests will prove some simple rates. But it's pointless to speculate any rate until tests are done.

- ÆCIII

 

[Crissa]

It will, of course, depend upon the environment and settings, as ÆCIII said.

• If it's colder, it'll use more power to protect itself.
• Certain maintenance settings will use more power.
• If you don't have wifi, it'll use more power to communicate.
• If you run Sentry mode, it'll use more power - and more power per Sentry event.
• If you poll it via the app, that'll run the computer more.

Generally, a Tesla doesn't exceed the draw of a granny cable (your 120v connection) until you get down to -20F. But with other settings and conditions, it might hit it earlier.

And of course, the truck being big and heavy means each mile requires more energy, and a granny cable isn't going to provide any more energy to a Cybertruck than my Zero S, so the truck consequently will charge fewer miles per hour.

-Crissa

 

[TeslaFANa]

I agree with the napkin math stated above, if your model 3 which has about a 75 KW battery gets 5 mph, my model S which has 100 KW battery gets 4 mph. Then the Cyber truck and it's 123 KW battery would get roughly 3 mph. Of course this would change if you're sitting at 10° weather and it probably won't give you 3 mph if you're starting at 3% SOC. You can always turn off sentry mode to decrease your phantom drain.

 

[cgladue]

I’m just wondering, say I travel to a relatively remote location for the weekend and bring a mobile 110v charger. How much could I get per hour? Usually on my Y or 3 I get 5miles/hr. Does this mean the cyber truck will get like 2 or less? So where 10-15 hours of charging gets me 50-75 miles it would only give me 20-35? This is my biggest worry about the truck going semi-off the charging grid cause it might be a battery death trap!

One of the coolest perks is when I drive some place like a lake house to hang out for a weekend I leave with a full battery after trickle charging.

charging at 120v is not trickle charging. Trickle charging is specifically charging a fully charged battery at the same rate that it self discharges so that it stays fully charged.

what you are doing is level 1 charging, or charging very very very slowly. you shouldnt think of it as miles per hour of charge you should be thinking of total energy put back into the battery (which you can then calculate miles from based on your wh/mi consumption rate. if you average 500 wh/mi and charge on 110v at 12amps thats at best 1440 watts. meaning you will get about 2 or 3 miles per hour of charging if there was no losses, but charging on 120v has the most losses and is only 70-80% efficient so you wont be putting all 1440 watts into the battery, maybe like 1100 watts. and if its cold then forget about it, almost all of that will be used to keep the battery warm. better to just look at the screen and see what it shows for total kwh added and do the math from that based on your wh/mi usage rate.

 

[scottf200]

Some previous numbers (miles gained per hour) from large battery Tesla cars ...
but those had 'much' better Wh/Mile efficiencies.

 

[Woodrick]

I’m just wondering, say I travel to a relatively remote location for the weekend and bring a mobile 110v charger. How much could I get per hour? Usually on my Y or 3 I get 5miles/hr. Does this mean the cyber truck will get like 2 or less? So where 10-15 hours of charging gets me 50-75 miles it would only give me 20-35? This is my biggest worry about the truck going semi-off the charging grid cause it might be a battery death trap!

One of the coolest perks is when I drive some place like a lake house to hang out for a weekend I leave with a full battery after trickle charging.

The Cybertruck seems to get about 65% of what a Model 3 or Model Y gets when charging. I charge both my Model 3 and my Model Y off of a single 120V plug by alternating access. It works for us.

BUT, in remote locations, that generally suggest slower roads to get there. So it is probable that your range will increase significantly. On 30-35 mph roads, it's possible that not only do you beat the EPA Blended numbers, but maybe even 500 miles range.

So yes, 3 mph is what I've been hearing.

 

[RandyS]

Aside from how many miles you'll get with Level 1 charging, from a safety perspective keep an eye on the temperature of the actual outlet and the plug at the outlet. Charging continuously for hours or days on end at maximum current will expose any poor connections that are present on the outlet.

Especially troublesome on 120v outlets are the spring-loaded backstab connections on the rear that are are held in place with springs and not screw terminals (they can loosen and overheat over time). And since many garage outlets are daisy-chained from the breaker/panel, you may have to check/repair/replace several outlets to get a good solid connection to the mobile connector/charger.

https://cohesivehomes.com/backstabbed-outlets-safe-or-unsafe

 

[fhteagle]

The other problem is the parasitic draw from having things powered up, like vehicle computers, circulating pumps, etc. I don't have an exact figure, but on our Y it is something like 300-400W when charging, even at very low rates. Makes all L1 charging and low amp L2 charging also very inefficient. We figured out we get better charging efficiency to use the next higher multiple of 16A instead of throttling charging amps to follow solar.

 

[cgladue]

The Cybertruck seems to get about 65% of what a Model 3 or Model Y gets when charging. I charge both my Model 3 and my Model Y off of a single 120V plug by alternating access. It works for us.

BUT, in remote locations, that generally suggest slower roads to get there. So it is probable that your range will increase significantly. On 30-35 mph roads, it's possible that not only do you beat the EPA Blended numbers, but maybe even 500 miles range.

So yes, 3 mph is what I've been hearing.

you must be a glutton for punishment if you charge off 120v and it works for you lol if i only had 120v available i would not own an EV.

 

[Woodrick]

The other problem is the parasitic draw from having things powered up, like vehicle computers, circulating pumps, etc. I don't have an exact figure, but on our Y its something like 300-400W when charging, even at very low rates. Makes all L1 charging and low amp L2 charging also very inefficient. We figured out we get better charging efficiency to use the next higher multiple of 16A instead of throttling charging amps to follow solar.

Thats why you see the Model 3 and Model Y go from 4 mph while awake to 5 mph once asleep.

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