Charging Two EVs at Home

[e92er]

I need a solution for charging two EVs at home. I currently have a Chargepoint EVSE hooked up at 60a to a subpanel in my garage. I had upgraded my panels and had a subpanel installed when I bought my Taycan with the thought that EVs were the future and wanted to future-proof as much as possible.
Well fast fwd to now and we just bought a Mustang Mach E GT for my wife. We both drive a decent amount daily, sometimes unpredictably, so we both want to charge every night. Question is how?

I looked at a few options. I can add a second Chargepoint, but my electrician says I need a load shed management device to avoid the "wiring from getting too hot" but I can't find much good info on these and don't know much about them.

I can replace my current unit with a dual EVSE like the ClipperCreek. Grizzl-E also has one but it doesn't have the best reviews. Don't know of any others that might be good?

There's also the Wallbox Pulsar Plus that has built in load shedding I think if you install two? But I would then have to replace my chargepoint with two of these. I know the Tesla EVSE has that feature too but....it's Tesla...

Any other suggestions or recommendations?

Sponsored

 

[j.w.s]

I need a solution for charging two EVs at home. I currently have a Chargepoint EVSE hooked up at 60a to a subpanel in my garage. I had upgraded my panels and had a subpanel installed when I bought my Taycan with the thought that EVs were the future and wanted to future-proof as much as possible.
Well fast fwd to now and we just bought a Mustang Mach E GT for my wife. We both drive a decent amount daily, sometimes unpredictably, so we both want to charge every night. Question is how?

I looked at a few options. I can add a second Chargepoint, but my electrician says I need a load shed management device to avoid the "wiring from getting too hot" but I can't find much good info on these and don't know much about them.

I can replace my current unit with a dual EVSE like the ClipperCreek. Grizzl-E also has one but it doesn't have the best reviews. Don't know of any others that might be good?

There's also the Wallbox Pulsar Plus that has built in load shedding I think if you install two? But I would then have to replace my chargepoint with two of these. I know the Tesla EVSE has that feature too but....it's Tesla...

Any other suggestions or recommendations?

The cleanest answer is: Get two chargers, hardwired into the same circuit, that have the ability to communicate/coordinate their output to stay within the capabilities of that circuit. If you have say a 60A circuit and charge at 48A, a single car will get 48A, but charge two cars and each gets 24A - and it's all automatic.

Wallbox, for example, does this using a separate communication cable between up to 25 chargers on one circuit.

Enphase also supports sharing: https://enphase.com/store/ev-chargers/ev-chargers-business/share2-hcs-80-ev-charger-bundle

I have two Juicebox EVSEs (no longer sold in the US) that do circuit sharing wirelessly.

I know that several other EVSE vendors have load/circuit sharing features, but certainly not all of them.

Tesla does sharing, but then you have to feed the Nazi-adjacent anti-environmentalist, so not for me.

 

[daveo4EV]

I need a solution for charging two EVs at home. I currently have a Chargepoint EVSE hooked up at 60a to a subpanel in my garage. I had upgraded my panels and had a subpanel installed when I bought my Taycan with the thought that EVs were the future and wanted to future-proof as much as possible.
Well fast fwd to now and we just bought a Mustang Mach E GT for my wife. We both drive a decent amount daily, sometimes unpredictably, so we both want to charge every night. Question is how?

I looked at a few options. I can add a second Chargepoint, but my electrician says I need a load shed management device to avoid the "wiring from getting too hot" but I can't find much good info on these and don't know much about them.

I can replace my current unit with a dual EVSE like the ClipperCreek. Grizzl-E also has one but it doesn't have the best reviews. Don't know of any others that might be good?

There's also the Wallbox Pulsar Plus that has built in load shedding I think if you install two? But I would then have to replace my chargepoint with two of these. I know the Tesla EVSE has that feature too but....it's Tesla...

Any other suggestions or recommendations?

Two Tesla Universal Wall Chargers (they support up to 6 units "sharing') - they can "share" a single circuit/capacity - and will dynamically shift load based on actual usage

I have 3 at home sharing a 100 amp circuit (80 amps of charing capacity) I routinely charge 1, 2, and 3 vehicle's at the same time - it works great.

Choices I know exist (there may be others - the list below may not be comprehensive)

• Tesla Gen3 Wall Chargers (Universal or NACS - but I see no reason not to get the Universal NACS/J-1772) - power sharing feature setup with TeslaOne app…
• Wallbox (apparently)
• Emporia (maybe) - check them out
• Enphase/ClipperCreek - share2 feature - ask them about it.

_OR_ if you have enough capacity you can just setup two EVSE's each with static/dedicated circuit breakers

• Example: you have 60 amp breaker
• Solution: setup 2 separate EVSE's - each with
  • one on 20 amp breaker, and the other on a 40 amp breaker
  • one on 30 amp breaker and the other on a 30 amp breaker

I prefer the "dynamic" and shared solution - because if you're charing one EV you get "full power" - and if you're charging two EV's you get split power - but as one EV finishes the other EV charger gets all the excess power and then it finishes sooner…

 

[mystermykee]

I know the Tesla EVSE has that feature too but....it's Tesla...

I know how you feel. I ended up purchasing one after JuiceBox crapped the bed. I felt so disgusted, but it is one of the better L2 chargers. Convenient for your Tesla buddies if they ever need to charge.

 

[Valerian]

I need a solution for charging two EVs at home. I currently have a Chargepoint EVSE hooked up at 60a to a subpanel in my garage. I had upgraded my panels and had a subpanel installed when I bought my Taycan with the thought that EVs were the future and wanted to future-proof as much as possible.
Well fast fwd to now and we just bought a Mustang Mach E GT for my wife. We both drive a decent amount daily, sometimes unpredictably, so we both want to charge every night. Question is how?

I looked at a few options. I can add a second Chargepoint, but my electrician says I need a load shed management device to avoid the "wiring from getting too hot" but I can't find much good info on these and don't know much about them.

I can replace my current unit with a dual EVSE like the ClipperCreek. Grizzl-E also has one but it doesn't have the best reviews. Don't know of any others that might be good?

There's also the Wallbox Pulsar Plus that has built in load shedding I think if you install two? But I would then have to replace my chargepoint with two of these. I know the Tesla EVSE has that feature too but....it's Tesla...

Any other suggestions or recommendations?

Are you sure you can't share. We have two EVs and works fine. It would be unusual if you both did 200 miles every day but maybe different the other side of the pond?

 

[e92er]

Thanks all! Atleast that helped take out the stand alone load shed management device. Will see if my electric company has any discounts on the Wallbox or Enphase. I doubt they have it on the Tesla but I'll check anyways!

 

[anonymouse]

We have two chargers (the brand is probably irrelevant for you in the US but they are Easee One) which intelligently decide how to share power. They generally make good decisions and there is a web interface to override the priority if needed. We charge only on cheap overnight power (0000-0700) so if you have similar, you will just want to be aware that if both cars are drained on the same day, it takes a couple of days for both cars to catch up.

 

[Midlifecrisis]

We have 2 chargers, each with its own 40A fuse and wiring. They work independently. Both have a load sensing CT clamp on the incoming power cable to the house and will throttle back if needed - one is set to reduce power usage if the house input goes over 90A and the other is set at 95A. I have not had any problems with this setup and my wife and I both charge in the cheap 6 hour window for our electricity tariff. I would just get another charger of your choice and wire it up like that

 

[daveo4EV]

We have two chargers (the brand is probably irrelevant for you in the US but they are Easee One) which intelligently decide how to share power. They generally make good decisions and there is a web interface to override the priority if needed. We charge only on cheap overnight power (0000-0700) so if you have similar, you will just want to be aware that if both cars are drained on the same day, it takes a couple of days for both cars to catch up.

We have 2 chargers, each with its own 40A fuse and wiring. They work independently. Both have a load sensing CT clamp on the incoming power cable to the house and will throttle back if needed - one is set to reduce power usage if the house input goes over 90A and the other is set at 95A. I have not had any problems with this setup and my wife and I both charge in the cheap 6 hour window for our electricity tariff. I would just get another charger of your choice and wire it up like that

most (99%) North American homes don't have any load sensing and therefore it's uncommon to have appliances/devices that "adjust" based on monitoring the home's overall usage - although this is changing it's changing slowly

at the moment "emporia" is the only EVSE I'm aware of that integrates with home load sensing and adjust's it's usage based on capacity…it's a slick product, but not the norm.

the product solutions in North America are by and large a subset of EVSE's can be configured to share a configured max capacity - and the EVSE's co-operate between themselves to stay with in the configured capacity while charging…it's a slick setup and I've had it for various garage setups for at least a decade now and wouldn't do it any other way…

 

[daveo4EV]

Thanks all! Atleast that helped take out the stand alone load shed management device. Will see if my electric company has any discounts on the Wallbox or Enphase. I doubt they have it on the Tesla but I'll check anyways!

the Tesla EVSE's are $650 each - honestly the electrical work here is the "cost" not the EVSE…

https://shop.tesla.com/product/universal-wall-connector

 

[PhillyTCT4S]

Tesla Juniper Y and Taycan Cross Turismo - 2 Tesla chargers in the garage. Never had an issue.

 

[slothinker]

Are you sure you can't share. We have two EVs and works fine. It would be unusual if you both did 200 miles every day but maybe different the other side of the pond?

I'm charging two EVs with a 40A 220V charger I got after Porsche recalled theirs and it's super easy and have not once run into a 'demand conflict'. My new charger has a 30-foot cord which might come in handy in some 2-car-charging situations. Suggest trying it with one before going to all the trouble to set up a second charging station.

 

[e92er]

the Tesla EVSE's are $650 each - honestly the electrical work here is the "cost" not the EVSE…

https://shop.tesla.com/product/universal-wall-connector

Fortunately when I initially bought the Taycan, I had a sub panel installed in the garage. I have one EVSE a foot and half away on one side and can add the second to the other side so hopefully install costs should be at a minimum. I’m leaning towards the wallbox though because I have kids about to start driving and I’ve always planned on buying them a couple years old teslas, but they’ll be parking in a detached garage that’ll likely be wired out from my subpanel and I read the wallbox can support load sharing with more than 2 units. Not sure if Tesla EVSE does the same.

 

[daveo4EV]

Fortunately when I initially bought the Taycan, I had a sub panel installed in the garage. I have one EVSE a foot and half away on one side and can add the second to the other side so hopefully install costs should be at a minimum. I’m leaning towards the wallbox though because I have kids about to start driving and I’ve always planned on buying them a couple years old teslas, but they’ll be parking in a detached garage that’ll likely be wired out from my subpanel and I read the wallbox can support load sharing with more than 2 units. Not sure if Tesla EVSE does the same.

upto 6 Tesla Gen3 (NACS or Universal) can be "powershared" - see above where I note that I'm currently using 3 "powershared" units.

link to the Installation guild provided below - and attached to this thread

https://digitalassets.tesla.com/tesla-contents/image/upload/gen-3-wall-connector-manual.pdf

page 32 is the documentation for "group power management" - it notes up to 6 units can be managed to share a single circuit capacity.

The firmware-based group power management feature enables up to 6 Wall Connectors installed at the same site tointelligently share the site's total available power via unit-to-unit Wi-Fi. This minimizes the need for many residentialand commercial applications to have specific electrical upgrades for concurrent multi-vehicle charging.

Recommend the "universal" unit - it has a very very slick well designed and integrated J-1772 adapter which means this EVSE is plug&charge for either a North American J-1772 or NACS EV…

I've had my Tesla Universal units operational and poweshared since Oct. of 2022 (when I finally gave up on my Porsche PMCC's units) - they've provided 1000's of Kwh's in that time and charged many many different EV's and hybrids (my personal EV's and friends/family/neighbors)

also asked & answered

Two Tesla Universal Wall Chargers (they support up to 6 units "sharing') - they can "share" a single circuit/capacity - and will dynamically shift load based on actual usage

I have 3 at home sharing a 100 amp circuit (80 amps of charing capacity) I routinely charge 1, 2, and 3 vehicle's at the same time - it works great.

Sponsored