ChargePoint Flex (hardwire) Tech Question

[autockr989]

New Member Here, I recently took delivery of a 2023 Taycan Turbo. I did not opt for the 19.2kw option as I didn't think was necessary as the grid is not ready for it and can be retro fitted if ever needed at a later date. I was using the Porsche supplied home charger with a 50 amp breaker and 6 gauge wire. I live in South Florida and recently with the humidity was running into an overheating issue with I was charging at 100% on the unit. Up until the overheating issue, I was getting 9.6kw charge. Just recently switched to the Charge Point Flex hardwired, it seems not one person you speak to with them, with Porsche, or honestly anyone other than an end user has any understanding of charging in the entire industry yet. Kind of strange.... Anyway, the instructions say if you want to charge at 37m per hour, need to install a 70 or 80 amp breaker to run a 50 amp charge and if you use a 50 amp breaker, it backs it down?? this is where its a bit unclear. Basically what I did was left the 50 amp breaker I had already installed, and in the app set up, I told it that I was running an 80 amp. Right now I am charging at 10.5 kw. Now supplying the backround info, my questions are below if anyone that has also gone through this can help me. I much appreciate the insight.
1. Is 10.5kw the max I am going to get out of this even if I swap out the Breaker to a 70 or 80?
2. I'm guessing the app is really just software, but I am not understanding why they want you to run a slow output on a 50 amp breaker, if the system goes up to 50amps.
3. The charger max output is 12kw, from what I read, the car charges up to 11kw (is this even true) or if I jump to 80 amp breaker, will I squeeze out more output?
thanks again and look forward to the comments.

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[daveo4EV]

your Taycan with out the optional factory 19.2 kW on board charger can charge at a maximum 11 kW (48 amps on a 60 amp breaker) - this is standard equipment for all North American Taycan's and has been that way since the model's introduction in 2019/2020…

there are two possible AC power L2 "maximum" charge rates for Taycan in North America - this is governed by the capacity of the "on board charger" installed in the vehicle at the factory.

1. 11 kW is standard - in NA this is 48 amps w/60 amp breaker an appropriate wire
2. 19.2 kW is optional - in NA this is 80 amps w/100 amp breaker an appropriate wire

the maximum rate any EV can charge at however also depends on what an EV charger (called an EVSE) can provide - while EVSE's can come in any capacity there are some common configurations

• 120V @ 12 amps (15 amp breaker) - 1.44 kW max power provided
• 240V @ 24 amps (30 amp breaker) - 5.77 kW max power provided
• 240V @ 32 amps (40 amp breaker) - 7.68 kW max power provided
• 240V @ 40 amps (50 amp breaker) - 9.6 kW max power provided
• 240V @ 48 amps (60 amp breaker) - 11 kW max power provided
• 240V @ 80 amps (100 amp breaker) - 19.2 kW max power provided

the maximum rate your EV will charge at is a combination of the onboard charger's "limits" & what the EVSE is able to provide.

• your Taycan will never charge faster than 11 kW - because the onboard charger is limited to 11 kW (240v @ 48 amp - 60 amp breaker)
• you Taycan will never charger faster than what any given EVSE can provide (can't get blood from a stone)

plugging your Taycan into an 80/100 amp EVSE (19.2 kW potential) will still charge at only 11 kW
plugging your Taycan into a 12/15 amp EVSE will only charge at 1.44 kW because the EVSE can not offer more power - even though your Taycan can charge at 11 kW - it will _NOT_ because that would overload that particular EVSE.

plugging in a 2017 Chevy Bolt to an 80/100 amp 19.2 kW EVSE will still only charge the Chevy Bolt at 7.68 kW - it's maximum charge rate.

plugging _ANY_ EV into a 1.44 kW EVSE will result in a 1.44 kW charge rate - even _IF_ the EV can do 19.2 kW - the car will not request/use more power than is offered by the EVSE.

switching to 80 amps will make no difference for _YOUR_ Taycan - but you would also need new wire as 6 gauge wire is not rated to handle 80/100 amp loads and a new 100 amp circuit breaker.

I was unaware of a Chargepoint flex supports more than 60/48 amps configuration - but I could be wrong.

_ALL_ North American EV charging is done at max 80% of the circuit breaker - this is because it's a continuous load device and all north american EVSE's run at 80% of the breaker load for many many various safety reasons.

not sure 6 gauge wire is rated for 60/48 amps - please consult a local electrician - also you should not be running 11 kW on a 50 amp breaker - that is over spec for that size breaker - I think for a 60 amp breaker 4 gauge wire is required

I would have a qualified EV electrician review and if necessary "fix" your charge point installation - running two much power through underrated wire/breaker _IS_ a fire hazard.

upgrading to 100 amp breaker will make no difference to your Taycan - it's max L2 AC charging speed is 48 amps (11 kW) which required a 60 amp breaker and appropriate 60 amp rated wire gauge from the breaker to the EVSE.

this is all discussed in these other threads…

https://www.taycanforum.com/forum/t...age…for-those-that-wish-to-over-do-it-….2343/

https://www.taycanforum.com/forum/t...estly-bare-bones-least-amount-of-text….11745/

 

[daveo4EV]

retrofitting the 19.2 kW onboard charger after vehicle manufacture is about $5000 according to my local service shop and people who have actually done it.

https://www.taycanforum.com/forum/t...ng-retrofit-cost-in-us-price-breakdown.12325/

 

[daveo4EV]

New Member Here, I recently took delivery of a 2023 Taycan Turbo. I did not opt for the 19.2kw option as I didn't think was necessary as the grid is not ready for it and can be retro fitted if ever needed at a later date. I was using the Porsche supplied home charger with a 50 amp breaker and 6 gauge wire. I live in South Florida and recently with the humidity was running into an overheating issue with I was charging at 100% on the unit. Up until the overheating issue, I was getting 9.6kw charge. Just recently switched to the Charge Point Flex hardwired, it seems not one person you speak to with them, with Porsche, or honestly anyone other than an end user has any understanding of charging in the entire industry yet. Kind of strange.... Anyway, the instructions say if you want to charge at 37m per hour, need to install a 70 or 80 amp breaker to run a 50 amp charge and if you use a 50 amp breaker, it backs it down?? this is where its a bit unclear. Basically what I did was left the 50 amp breaker I had already installed, and in the app set up, I told it that I was running an 80 amp. Right now I am charging at 10.5 kw. Now supplying the backround info, my questions are below if anyone that has also gone through this can help me. I much appreciate the insight.
1. Is 10.5kw the max I am going to get out of this even if I swap out the Breaker to a 70 or 80?
2. I'm guessing the app is really just software, but I am not understanding why they want you to run a slow output on a 50 amp breaker, if the system goes up to 50amps.
3. The charger max output is 12kw, from what I read, the car charges up to 11kw (is this even true) or if I jump to 80 amp breaker, will I squeeze out more output?
thanks again and look forward to the comments.

I read this again - you should set the Charge point EVSE to 40 amps maximum - this is the appropriate maximum rating for your breaker/wire - running the ChargePoint EVSE at more than 40 amps is a serious overheating/fire concern for your current setup (50 amp breaker w/6 gauge wire)

If you want run at a higher capacity you must have a qualified electrician upgrade your breaker & wire gauge for greater capacity. 6 gauge wire is only rated for a 55 amp breaker - running an EV charging session at 48 amps requires a 60 amp breaker - which is overcapacity for 6 gauge wire and a fire hazard.

 

[daveo4EV]

never seen anyone that needs this video more than you…

 

[ciaranob]

https://www.chargepoint.com/drivers/home/settings/flex/

https://www.chargepoint.com/drivers/home/resource/

Expand the additional tips section for more info.


Also their FAQ page for this EVSE:
https://www.chargepoint.com/drivers/home/installation/flex/

ChargePoint HomeFlex EVSE (model CPH50) ONLY when hard wired, can handle circuits rated to 80A (full range of options for this unit is 20A to 80A):

https://www.chargepoint.com/resources/chargepoint-home-flex-cph50-hardwired-installation-video

 

[daveo4EV]

this is what _WILL_ eventually happen if you run an EVSE overspec on an under-rated circuit…it's a serious fire hazard - this is not what _CAN_ happen - it's what _WILL_ happen - it's actuall physics/math as to when/how a circuit will fail.

 

[daveo4EV]

https://www.chargepoint.com/drivers/home/settings/flex/

https://www.chargepoint.com/drivers/home/resource/

ChargePoint HomeFlex EVSE (model CPH50) ONLY when hard wired, can handle circuits rated to 80A (full range of options for this unit is 20A to 80A):

https://www.chargepoint.com/resources/chargepoint-home-flex-cph50-hardwired-installation-video

thanks for the update !!! chargepoint makes great EVSE's - I appreciate the facts.

 

[autockr989]

thanks for the thorough responses, this should all be on ChargePoint's site LOL.

 

[ciaranob]

thanks for the thorough responses, this should all be on ChargePoint's site LOL.

It is

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