Nema 14-50 charge rate.

[mrflakybiscuits]

AWD Foundation Series
Traveled to Oklahoma first day I got it. No chargers here. However there is an RV park on the south side of town that’s listed on PlugShare for having rates to use mobile charger in the back.
Talked to the nice lady at the front desk, pulled around back, plugged in and started charging.
Bad part of the experience is that the charge rate on this is being inconsistent.
bouncing from 25mi/hr- 11mi/hr charge rate.
5.5 hours to charge from 40%-80%
9 hours 40%-100%
This is my first electric vehicle. Is it common to have the charge rate not sit at a consistent level?

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[CyberMoose]

So I don't know if other people have experienced this when using their mobile chargers. But I will say that it's entirely possible that it has nothing to do with the truck or the charger at all.

I have no knowledge at all when it comes to RV parks, but maybe the supply is being split somewhere and you are just getting whatever is available at that time.

I don't really watch my car charging at home, but I know that anytime I go home and start charging for a drive later, the amount I have is always what I expect from my charging speeds.

 

[Texarado]

Could definitely be an RV park issue, could also be battery temperature depending on ambient temp.

 

[TeslaFANa]

AWD Foundation Series
Traveled to Oklahoma first day I got it. No chargers here. However there is an RV park on the south side of town that’s listed on PlugShare for having rates to use mobile charger in the back.
Talked to the nice lady at the front desk, pulled around back, plugged in and started charging.
Bad part of the experience is that the charge rate on this is being inconsistent.
bouncing from 25mi/hr- 11mi/hr charge rate.
5.5 hours to charge from 40%-80%
9 hours 40%-100%
This is my first electric vehicle. Is it common to have the charge rate not sit at a consistent level?

Unstable charge rate is usually seen with faulty electrical wiring or underpowered electrical source that shares the output with other things, at least that's what I was told. I have seen that a couple of times only. You'll find that for the most part between 20 and 80%, charge rate is pretty stable, I would say 99% of j1772 plugs charge my model S at 20 mph consistently, 110v =4 mph consistently

 

[TeslaFANa]

Could definitely be an RV park issue, could also be battery temperature depending on ambient temp.

Could be battery temperature as well. However, once the battery warms up a little bit, it tends to stay at a steady rate

 

[mrflakybiscuits]

I bet it’s a battery temp thing.
It was 40 deg F overnight.

 

[Texarado]

I bet it’s a battery temp thing.
It was 40 deg F overnight.

Don’t discount the RV park issue though. As someone who has been at a number of them, there are wildly varying draws on those pedestals.

Are you towing anything? I’m still trying to get more tow data on the truck.

 

[Gigahorse]

A lot of those campgrounds do not have the wiring for a continuous draw at 30-40amps, a lot of them will not allow EVs so it is good you checked first.

 

[Tiberius]

Only charged at an RV place twice and had issues both times. First time the car reported a bad neutral on a socket that RV had used for weeks without issues. Turned out to be bad wiring.
Second time power was all over the place, I guess depending on what everyone else was doing.

 

[mrflakybiscuits]

Don’t discount the RV park issue though. As someone who has been at a number of them, there are wildly varying draws on those pedestals.

Are you towing anything? I’m still trying to get more tow data on the truck.

Fair point. I’m not towing, but I do have 4 adult passengers. And the bed was fully loaded down with 5 carry on suitcases and 4 slightly smaller travel bags, a full ice chest of food/ice
Under bed storage filled 1/2 way, frunk had 2 cases water, and a small bag.
Rough math of all weight combined (passengers, cargo) I estimate at 1500 lbs
I plan on figuring out the range numbers I get later.

 

[XCeilidhX]

When there weren’t superchargers yet I had some interesting experiences with my Model S and “chargesitting” for hours does get boring.

although there may have been a battery temp issue in the first hour or so that should have corrected in not too long so my guess is that the power to your plug was split between campsites and as different RVs used the plugs the total available to your plug fluctuated (if I had to guess).

That slow and with that much fluctuation will happen at plugs that aren’t EV-dedicated out in the wild.

i wouldn’t assume it’s the truck or your charger.

FWIW

Cheers

 

[Known-Background]

AWD Foundation Series
Traveled to Oklahoma first day I got it. No chargers here. However there is an RV park on the south side of town that’s listed on PlugShare for having rates to use mobile charger in the back.
Talked to the nice lady at the front desk, pulled around back, plugged in and started charging.
Bad part of the experience is that the charge rate on this is being inconsistent.
bouncing from 25mi/hr- 11mi/hr charge rate.
5.5 hours to charge from 40%-80%
9 hours 40%-100%
This is my first electric vehicle. Is it common to have the charge rate not sit at a consistent level?

Your first mistake was getting an awesome electric truck and bee-lining it to a charging desert. “ so I just got a Tesla cyber truck and immediately wanted to go for a curse around Oklahoma”… but seriously I started a thread on this very topic… trickle charging aka mobile charging with the travel charger might be unrealistic with the cybertruck unless you are sticking around for a day or two.

 

[Outdoors]

Your first mistake was getting an awesome electric truck and bee-lining it to a charging desert. “

Sometimes you have to get away from the malls and shopping centers. Wait I forgot the parking garage roof, where people for some reason love to take pics of a truck. Nice to see someone venturing out a bit. I mean how boring life would be if we were tied to our home or some network of chargers. Welding circuits on farms are always a great. I bet if you knocked on a door you would get one. Might be a long drive down the driveway however.

 

[mrflakybiscuits]

Your first mistake was getting an awesome electric truck and bee-lining it to a charging desert. “ so I just got a Tesla cyber truck and immediately wanted to go for a curse around Oklahoma”… but seriously I started a thread on this very topic… trickle charging aka mobile charging with the travel charger might be unrealistic with the cybertruck unless you are sticking around for a day or two.

its definitely plenty enough for us to make it back to civilization,
I originally planned this with getting a rental suv, but I got the call to be able to pickup the truck the morning that we were going to depart so it worked out and I had the entire plan routed on PlugShare before I even knew that I was going to get the truck.

 

[CyberGus]

Is it common to have the charge rate not sit at a consistent level?

In both photos, the on-screen display shows a 32A charge. That seems consistent.

The difference is in the "miles per hour", which is not a measurement but a calculation based on the rate of charge and the expected Wh/mile efficiency.

I would speculate that the BMS is still calibrating, and/or is using sloppy mathematics that cause the number to jump around instead of using a smoother averaging technique.

Haven't you ever downloaded something with a consistent speed, yet it would jump all over the place with "X minutes remaining" that was never right?

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