Residential dual charging stations?

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barsad22

Well-known member
Joined
Jan 14, 2011
Messages
142
Location
Berkeley, CA
Hello -
I'm wondering if anyone has used a dual charging station at their house. That is, a single unit with two standard J-1772 240V plugs for two EVs. I have only seen commercial units from Aerovironment and Schneider (links below), and they are expensive, heavy pedestals, while I'm just looking for something that can be wall mounted inside or outside a garage. Is it feasible to have two chargers going at once on a 40A dedicated circuit?

Thanks,
Josh
http://store.evsolutions.com/rs-dual-pedestal-mount-p62.aspx?utm_medium=cse&utm_source=googlebase&gclid=CLjog7iR288CFUNafgodQ7YDvw

http://www.evchargesolutions.com/product-p/EV230PDR.htm?gclid=CJTy_uSR288CFQ5EfgodktkHcw
 
I would just get two EVSEs. Having two EVs and only one EVSE calls for trouble. Cords running in the garage in front and under cars are not a good idea. I know from experience :(. If your electrical panel cannot support two 32 amps EVSEs, set one to 16 amps and one to 32 amps. If that is still two much then make sure you are not using the 16 when the 32 is charging. I had two EVs for more than 4 years now. I now have the Blink and EVSE upgrade on opposite walls, and a 40 amp OpenEVSE that I can take with me. Of course EVSE upgrade is also portable.
 
I have two EV charging station in my garage. It's two OPEN EVSE units. I can't see buying an expensive Dual unit when the simplest answer is to wire in two units to two circuits that are dedicated to the job. If you're leaf has 6.6 charging, that 40a circuit you already have is fully utilized (by the 80% capacity code). For way less than a grand you can have two dedicated EVSE's installed. Do it yourself for half that.
 
I believe that we can help you out. See:

http://mainpine-ev.com/33452_mainpine-ev-flyer_v2.pdf

I use this in my garage. It shares the circuit capacity when multiple vehicles are charging. It delivers the full circuit capacity when only one is charging.
 
RePo said:
I have two EV charging station in my garage. It's two OPEN EVSE units. I can't see buying an expensive Dual unit when the simplest answer is to wire in two units to two circuits that are dedicated to the job. If you're leaf has 6.6 charging, that 40a circuit you already have is fully utilized (by the 80% capacity code). For way less than a grand you can have two dedicated EVSE's installed. Do it yourself for half that.

Key point here is if you use two separate EVSEs, each should be on a dedicated circuit with dedicated circuit breakers.
 
LKK said:
RePo said:
I have two EV charging station in my garage. It's two OPEN EVSE units. I can't see buying an expensive Dual unit when the simplest answer is to wire in two units to two circuits that are dedicated to the job. If you're leaf has 6.6 charging, that 40a circuit you already have is fully utilized (by the 80% capacity code). For way less than a grand you can have two dedicated EVSE's installed. Do it yourself for half that.

Key point here is if you use two separate EVSEs, each should be on a dedicated circuit with dedicated circuit breakers.

That's no longer a requirement when using EVSEs that can share one circuit and split the load as needed.

My current recommendation for someone with a little DIY spirit is to get two Tesla HPWCs at $550 each. Then put them on whatever circuit(s) you have available and replace the Tesla cord set with an appropriately sized J1772 cord set from Quick Charge Power: http://shop.quickchargepower.com/J1772-Plug-50-Amp-JP50A.htm

Or if you want it done for you: http://shop.quickchargepower.com/J-Wall-Premium-80A-Wall-Mounted-J1772-Charging-Station-JWALL80A.htm;jsessionid=B985273BB3AAFC225292E3A0FE757399.p3plqscsfapp001

FWIW this is what I'm doing for my two LEAFs.
 
The juice box pro is a nice unit . it can be set to share a circuit, and add EVSE for a lot of cars. WIFI able. low cost for what you get.
https://emotorwerks.com/store-juicebox-ev-charging-stations/202-juicebox-pro-40-smart-40-amp-evse-with-24-foot-cable/category_pathway-23
 
speedski97 said:
The juice box pro is a nice unit . it can be set to share a circuit, and add EVSE for a lot of cars. WIFI able. low cost for what you get.
https://emotorwerks.com/store-juicebox-ev-charging-stations/202-juicebox-pro-40-smart-40-amp-evse-with-24-foot-cable/category_pathway-23

+1

A very good solution for those who do not have the additional capacity for another 40/50A breaker on their box (most people don't).
 
Thanks for all the replies, there are more good options out there than I thought. My two cars will most likely be a Tesla 3 and a Prius Prime (though I'm open to the Leaf 2.0)... I know, it will be eons before I see the Tesla 3, don't remind me.
Inphoenix, can you describe the logistics/cost of putting a Tesla cord and J1772 on the Juicebox? So you can charge a Tesla at 48A and your Leaf at 16A with no problems?
I like the app management feature.

Best,
Josh
 
barsad22 said:
Inphoenix, can you describe the logistics/cost of putting a Tesla cord and J1772 on the Juicebox? So you can charge a Tesla at 48A and your Leaf at 16A with no problems? I like the app management feature.

Tesla comes with a J1772 adapter (http://shop.teslamotors.com/products/sae-j1772). I just connect it to the J1772 cord of JuiceBox and connect to Tesla. Tesla charges at 40A. When I need to charge the leaf, I don't use the adapter and just plug in the J1772. It charges at about 27A or so. You don't need to change anything as the on board chargers know what they can accept and will drop down the Amps even though the EVSE is capable of more.
 
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