Home Level 2 charging slower than expected

[DadzBoyz]

I don't think breakers/fuses have the ability to "downrate" the power level. They simply trip (breaker) or blow (fuse) if they detect more amperage drawn on the circuit than they're rated for. All-or-nothing.

My apologies if I wasn’t clear.
Agreed. The fuse, or breaker isn’t going to adjust anything.

I was trying to say that the Grizzl-E (EVSE) may be stepping down its output.
If it’s a 40 amp EVSE, and it only shows 40 amps coming in through a 40 amp breaker, it may be stepping itself down to 32-33 amps.

Sponsored

 

[generaltso]

I was trying to say that the Grizzl-E (EVSE) may be stepping down its output.
If it’s a 40 amp EVSE, and it only shows 40 amps coming in through a 40 amp breaker, it may be stepping itself down to 32-33 amps.

That’s not a thing. The Grizzl-E has no idea what size breaker is protecting the circuit. That’s why you manually set the amperage limit with dip switches.

By the way, fuse boxes were phased out of houses over 50 years ago.

 

[Phil-Springs]

That’s not a thing. The Grizzl-E has no idea what size breaker is protecting the circuit. That’s why you manually set the amperage limit with dip switches.

By the way, fuse boxes were phased out of houses over 50 years ago.

I had to have my grizzle e replaced as it started to have some internal over temp issues. I’d check the temp of the wires and box as it charges. Maybe it derates if it gets hot. Notes: - United chargers warranty service was exceptional. - sounds like most likely this is not a problem but really just a misinterpretation of what the various measurement devices are reporting.

 

[mkhuffman]

My apologies if I wasn’t clear.
Agreed. The fuse, or breaker isn’t going to adjust anything.

I was trying to say that the Grizzl-E (EVSE) may be stepping down its output.
If it’s a 40 amp EVSE, and it only shows 40 amps coming in through a 40 amp breaker, it may be stepping itself down to 32-33 amps.

The Grizzl-e has no idea what the size of the circuit breaker is. And there are no fuses, there are circuit breakers.

If the Grizzl-e is set to 40 Amps, this is what it will pull regardless of what the circuit breaker is. There are two ways it can pull less than 40 Amps:
1. The internal switch is set to a lower current.
2. The car tells the EVSE to supply less current.

The circuit breaker has nothing to do with it.

 

[kennethjk]

My apologies if I wasn’t clear.
Agreed. The fuse, or breaker isn’t going to adjust anything.

I was trying to say that the Grizzl-E (EVSE) may be stepping down its output.
If it’s a 40 amp EVSE, and it only shows 40 amps coming in through a 40 amp breaker, it may be stepping itself down to 32-33 amps.

It’s the car that is stepping it down. Many of us are having the same issue.

mine with a juicebox

 

[dbsb3233]

2. The car tells the EVSE to supply less current.

I've wondered if it even does that for AC charging? I have no idea, but it wouldn't surprise me if even max AC charging power is lower than (or about equal to) the lowest power level it limits DC charging to, thus might have no need (or even ability?) to communicate to an AC EVSE to vary the power level delivered (other than turning it off completely)?

 

[AZBill]

I've wondered if it even does that for AC charging? I have no idea, but it wouldn't surprise me if even max AC charging power is lower than (or about equal to) the lowest power level it limits DC charging to, thus might have no need (or even ability?) to communicate to an AC EVSE to vary the power level delivered (other than turning it off completely)?

The L2 EvSE tells the car the maximum it can provide. But the charger in the car determines the actual current to be output, at or below the EVSE limit.

 

[DadzBoyz]

By the way, fuse boxes were phased out of houses over 50 years ago.

Yes.
People still live in old houses.
Sometimes people use “fuse box” “breaker box” “service panel” etc. interchangeably because it’s easy and we do not know what EVERY person reading a message has.

 

[Shayne]

Mach-E doesn't tell you charging speed, FordPass does. And it truncates the decimal point digit.

40 x 240 = 9.6 less 10% loss = 8.6. So FordPass should show 8, as it does.

Your home power monitor should be showing power actually used, so it should be closer to 9.6. Does Grizzl-E have an app?




Not with a 40amp charger you don't. 40 x 240 = 9.6 less 10% loss = 8.6. 48amp charger would be a net of 10.4 or so, or worse.

I always base it on the dyna test results that showed 15% loss not 10%. But truncated 8 is good for a 40 amp. They should take the percentage charged x 90 KW / time to charge. Then result/9.6 to determine their efficiency.

My apologies if I wasn’t clear.
Agreed. The fuse, or breaker isn’t going to adjust anything.

I was trying to say that the Grizzl-E (EVSE) may be stepping down its output.
If it’s a 40 amp EVSE, and it only shows 40 amps coming in through a 40 amp breaker, it may be stepping itself down to 32-33 amps.

No that would be the car not a dumb charger. If I was getting truncated 8 KW into the car right now I would be happy unfortunately after a car update I am only getting 6 KW on 40 amp.

 

[generaltso]

Yes.
People still live in old houses.
Sometimes people use “fuse box” “breaker box” “service panel” etc. interchangeably because it’s easy and we do not know what EVERY person reading a message has.

If you're going to pick one to use interchangeably, you should say breaker since I bet there's about a 99.9% chance that anyone with a circuit for an EVSE doesn't have fuses. I guess you can say what you want, but in my opinion, it devalues the info you're providing when you use the wrong word. Sorry, I know I can be pedantic. People using kW and kWh interchangeably drives me nuts too.

 

[Garbone]

That’s not a thing. The Grizzl-E has no idea what size breaker is protecting the circuit. That’s why you manually set the amperage limit with dip switches.

By the way, fuse boxes were phased out of houses over 50 years ago.

Me and a handful of pennies would beg to differ.....


JK

 

[Mustang65]

I'd forgotten about the loss, thanks. And FordPass just dropping the fractional part is something I never knew, but it's ridiculously bad. 8 versus 8.6 is 7% lower. It makes me wonder if the charging loss isn't greater than 10%.

And no, this model charger doesn't have any smart function to report what it delivers.

 

[Maquis]

If you're going to pick one to use interchangeably, you should say breaker since I bet there's about a 99.9% chance that anyone with a circuit for an EVSE doesn't have fuses. I guess you can say what you want, but in my opinion, it devalues the info you're providing when you use the wrong word. Sorry, I know I can be pedantic. People using kW and kWh interchangeably drives me nuts too.

People in the industry use the term OCPD (Over Current Protection Device) as the catch-all term.

Ditto on the KW vs kWh thing!

 

[bdonpwn]

I'd forgotten about the loss, thanks. And FordPass just dropping the fractional part is something I never knew, but it's ridiculously bad. 8 versus 8.6 is 7% lower. It makes me wonder if the charging loss isn't greater than 10%.

This is a what my Grizzl-E setup typically performs at, around 7% loss (~9.4 at EVSE, ~8.8 at battery) and FordPass truncates the rate as a round “8 kw.”

 

[WildfireOne]

Getting back to the slow charging on L2...

This thread discusses the OTA software patch that limits charge based on charge port temperature...
https://www.macheforum.com/site/thr...rge-port-dtc-p0e5f-stored-in-the-sobdm.29967/
... to diminish the amount of charge port replacements Ford would have to do.

I remember seeing a post on another thread here from someone who aimed a room fan at his charge port so he could charge at 8kw as opposed to 6kw, and chuckling at his photo.

I laughed too soon.

Last night, I plugged in late on my 40A charger and saw that at 8kw, I'd be ready to roll at 6:45am according to Ford Pass. About 1/2hr later, I checked again and saw my rate down to 6kw and a ready time of 9:15ish.
I had to be at work an hour before that.
I don't have a room fan, so here's my ridiculous photo of the workaround -- blue ice wrapped around the charger hosel, to diminish temperature as much as possible to allow 8kw flow for maximum charge on a time-critical departure.

Sponsored