Level 2 charging curve

[Dylancch]

I was curious if any knows why it will charge at 6kw for 1 min then 3.5 kw for 1 min

Sponsored

 

[Marcel]

At what state of charge?

 

[Carsinmyblood]

'cause it doesn't do 4.75......?

I'm betting it's delivering power first to one cell and then to another singly or in batches via the relays. The relays (gates) open and close in stages based on what the inverter can store away at that moment.

 

[hybrid2bev]

'cause it doesn't do 4.75......?

I'm betting it's delivering power first to one cell and then to another singly or in batches via the relays. The relays (gates) open and close in stages based on what the inverter can store away at that moment.

But mine is steady at around 9 kW.

 

[macchiaz-o]

@Dylancch, what is your EVSE? Does it have indicator lights that may help diagnose this?

The pattern you show looks similar to what you'll see with Ford's mobile charger if the EVSE is overheating. The amber light on the EVSE will pulse on and off when that is happening.

If you have an infrared thermometer, measure the temps at various points on the charger body and its cabling and compare this to the product's specified limits.

 

[Dylancch]

So I have it set to come out at 3am it charged to 80% no issues when I woke up I hit charge to 100% and I was only at 82 when I took the screen shot

 

[Dylancch]

But mine is steady at around 9 kW.

I have never seen 9kw lol always 6

 

[Tyldum]

Mine is constant at 10.5kWh.

 

[SnBGC]

I was curious if any knows why it will charge at 6kw for 1 min then 3.5 kw for 1 min

Pretty cool. Never seen power use by the minute before. Might be normal.....Will have to see if my detail will go down to that level.

 

[macchiaz-o]

Oh. When I viewed from my phone, I didn't notice that you were displaying sub-minute measurements. My previous response doesn't apply.

How the heck is your power utility able to give you per-second measurements?

My power company does billing based on half-hour, hourly, or monthly measurements, depending on the selected plan. But they only offer hourly or monthly data exports to customers.

 

[Mach-Lee]

I was curious if any knows why it will charge at 6kw for 1 min then 3.5 kw for 1 min

Are you trying to charge through a dryer outlet with an adapter? This looks like you're overloading the circuit and it's dropping down current for protection. This is a really bad practice that could cause a fire if you continue doing it.

If you're charging from a dryer outlet you have to buy a special EVSE that is set up to only do 24 amps or less with the correct plug on it (like this). Do not use any plug adapters!

The included charger can only be used on 120V outlets or 240V circuits that are 40A or greater. So you shouldn't plug it into a 30A circuit.

 

[EV Lab]

Yeah, you really shouldn't overload the circuit you're plugged into, and only draw 80% of the current anything in the current path is rated to, e.g. breaker, plug and any cords or adapters. I use my dryer plug with a Wallplug brand EVSE that can configure the advertised current capability. I tell it to deliver 24A on a 40A circuit that has a 30A plug, and the car only tries to take 24A.

 

[macchiaz-o]

Are you trying to charge through a dryer outlet with an adapter? This looks like you're overloading the circuit and it's dropping down current for protection. This is a really bad practice that could cause a fire if you continue doing it.

If you're charging from a dryer outlet you have to buy a special EVSE that is set up to only do 24 amps or less with the correct plug on it (like this). Do not use any plug adapters!

The included charger can only be used on 120V outlets or 240V circuits that are 40A or greater. So you shouldn't plug it into a 30A circuit.

What circuit do you know of that can "drop down for protection?"

 

[Dylancch]

My mach e charger is rated for 32 amps it's on its own dedicated 40amp service

 

[Mach-Lee]

What circuit do you know of that can "drop down for protection?"

The EVSE can drop down available amperage due to overheating. The charger in the car can drop down if the charge port gets too hot, or if the voltage drops too low.

My mach e charger is rated for 32 amps it's on its own dedicated 40amp service

OK, that means your charging rate should be about 7.4 kW on 240V or 6.4 kW on 208V. You're only pulling 5.5 kW max on that graph so that so that tells me something isn't right. Drain the car down below 75%, then try charging again after plugging everything back in firmly. If you're still not hitting 6.4 kW or above, then you should call your electrician to check your circuit. You could have a loose connection somewhere that could melt or start a fire.

The other possibility is that your graph is based on faulty data and it's actually charging fine. Someone (electrician) should verify the real circuit amperage while charging with a clamp ammeter.

Sponsored