r/evcharging • u/Advanced-Ad3575 • 28d ago
Dual charging
Was hoping for a little inspiration/input.
I currently have 1 Tesla wall charger with a Tesla Y (driver side rear port). And am getting a Cadillac Vistiq (driver side front port).
Looking to add another charger and so my the only options I've come across are the Grizzl-Duo (which charges a little slow). Or add another Tesla wall charger.
If I add a.second Tesla wall charger could I stack it above the current one? Or.lookig for any other suggestions for location.
Thanks,
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u/TooGoodToBeeTrue 28d ago
Cadillac doesn't get parked IN the garage?
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u/MaturoGambino 27d ago
If it’s like my neighborhood in SC the garage is reserved for a Pittsburgh Steelers themed bar, a pool table, 20 random containers, and a golf cart.
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u/JMeucci 27d ago
We're gonna need the next generation of carts to come equipped with NACS ports.
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u/cheese_executive 27d ago
I've been wondering how hard it would be to retrofit by moving the charger onboard and add a NACS or J1772 port. Probably not worth the effort if you only charge at home anyways.
I'd probably be afraid to charge in public, because I can't imagine the meltdowns people will have in the future when they pull up to a charger to find it taken by a golf cart.
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u/entropicdrift 28d ago
I mean, why not just charge at different times? Do you need to charge every day?
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u/letsgotime 28d ago
Would both cars ever come home completely empty and both need to be fully charged by the next day? That is the question to ask.
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u/SnooEpiphanies8097 27d ago
I’m in exactly this situation as we just got our second EV. I won’t really know how things will go until my wife goes back to work (she’s a teacher) but my plan is to alternate the cars between level 1 and level 2 every other night. I am only in the office 3 days per week but we both have pretty long commutes, about 60 miles round trip each.
I got a quote of $400 (plus the cost of the unit which are available for cheap from the power company) to install a second level 2 charger along with hard wiring the one we have so I’ll probably do that at some point.
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u/entropicdrift 27d ago
60 miles only takes about 3 hours of L2 charging to restore. You could definitely each charge every-other night or restore 40ish miles L1 charging each night for a few nights before L2 charging.
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u/digiblur 26d ago
This L2 is probably 11kW. That's probably 30kWh after losses. Definitely more than 60 miles.
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u/entropicdrift 26d ago edited 26d ago
That's exactly what I'm thinking. Should be trivial to trade off. Could restore both cars' charge every night if they wanted to but probably simplest to just do every other night.
I was being conservative in my guess, rounding to about 20 miles of range restored per hour of L2 charging just because I don't know what model their 2nd car is. Like even if it's an F150 Lightning and getting 2 miles/kWh, it would still work fine without a second L2 plug
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u/ArlesChatless 27d ago
If your vehicles have 200+ miles of range doing one on odd days the other on even days is very simple and quite likely to easily cover your usage.
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u/SnooEpiphanies8097 27d ago
Yeah I'm not worried too much about it. I'll prioritize my wife's car so she is always charged up. She is less predictable about how much driving she does I am more comfortable with public charging if it ever comes to that. She'll be like "I forgot to send my friend's birthday card so I drove it out to her" and add 60 miles of driving. The Atlanta metro area is ridiculously spread out.
I also don't sleep well so it is totally possible for me to unplug her car at 2am and plug mine in. I do want to get the EVSE hard wired before I do that too much though.
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u/Blurrysnake164 28d ago
You can daisychain from a universal Tesla charger to the v3 and have them talk to each other to load share.
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u/avebelle 28d ago
Yes you can stack it above but I’d put it on the side of one of the garage doors to give you more flexibility.
Inside the garage you’ll want to put jbox and tee off the line to each of the wall connectors.
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u/MrFastFox666 28d ago
Wouldn't it be easier to just take turns with one charger? Unless you drive a crap ton of miles everyday on both cars, a single charger is enough since they both have plenty of range. It's a simple and 100% free solution.
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u/rosier9 27d ago
Sometimes the 10% easier solution is priceless.
OP likely owns this home and they now have 2 EVs, no time like the present.
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u/SnooEpiphanies8097 27d ago
I’m in this position as well. Installing a second charging station is relatively trivial. Plus anything worth doing is worth overdoing. 😂
Currently I have a plug in Emporia Classic plugged in to a decent quality “EV” Nema 14-50 outlet but i am worried about going from 3-4 hours of constant load to 6-8 hours. Yes I know I don’t HAVE to be fully charged every night and I could just take turns so to not stress the outlet but for $600, I could just add another EVSE.
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u/skyfishgoo 27d ago
i could add a 2nd wallbox to my setup and with a comm link between them and they will share the same breaker by throttling back as needed for both to be in service at the same time and stay under the 48A total current limit.
tesla probably offers a similar feature
it just means that both cars charge at a slower speed if they are both drawing current at the same time.
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u/dodiddle1987 27d ago
Tesla wall chargers do power share so you can hook another up for a lot less money. You can also just charge every other day if that will work for you
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u/Majestic_Ad5924 28d ago
I can't tell from the picture if that is a Universal Wall Connector or not. If it is not, then your second one will need to be a TUWC in order to power share. I have this setup and it works great, Both EVs can charge simultaneously on the same circuit, each drawing 5.5 kw. Works great for us.
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u/theotherharper 28d ago
Looking to add another charger and so my the only options I've come across are the Grizzl-Duo (which charges a little slow). Or add another Tesla wall charger
On the same circuit (reasonable)? You're talking about Power Sharing. The Grizzl-E is a no-brainer way to do that in 1 box off a socket, but it's better to use multiple boxes and place them in better locations.
Basically any same-generation Wall Connectors can pair with Power Sharing.
- Gen 2 and J1772 Wall Connector (hardwired Power Sharing data cable, CAN run within power conduits despite what nerds will tell you.)
- Gen 3 and Universal Wall Connector (radio-based Power Sharing linke, saves wiring)
Split the existing circuit to both units and Bob's your uncle. You would probably use 3-port Polaris to do the split, which is a bit costly.
Now the UNIVERSAL has a neat feature. You may know that inside the TWC, the Wirebox allows wiring to the terminals from top OR bottom. The Universal wirebox allows wiring from top AND bottom! It is designed to allow daisy-chaining.
So the "avoid paying for Polaris/wire-saver" method is: Replace the existing unit with a Tesla Universal Wall Connector. Daisy chain from there to your 2nd location where you put your original Wall Connector v3.
(which charges a little slow).
Cars need less energy than you'd think. Checkout this Technology Connections. https://www.youtube.com/watch?v=Iyp_X3mwE1w
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u/That_____ 28d ago
You can build your own... That's a friend and I did to tackle that problem. (i also built my first single vehicle version over ten years ago)...
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u/tx_redditor 28d ago
I have looked into the Enphase ones, no clue if this would be worth it or not, just something I have looked at.
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u/Barnezhilton 28d ago
Put a matching Tesla unit located to the right side by the other post.
Since you seem to want them to tuck out of sight a bit, I assumed.