Nvbob
Roadster 1256
@athostmadsen - Buy two of these, hire a "Tesla Certified Installer" and have them set up Group Power Management. This way you won't burn your house down.
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Charging two Teslas
- Thread starter ahostmadsen
- Start date
The main thing is we need to charge mainly during daytime to get the electricity from our PV. There is a somewhat narrow window when there is sun and the cars are at home.
Heres the link to the Wall connector gen 3 installation guide scroll down to page 33: https://www.tesla.com/sites/default...ng/Gen3_WallConnector_Installation_Manual.pdf
You’re right. It seems like WC3 doesn’t allow connecting multiple WC to a single circuit breaker. The third diagram is missing from the most recent installation guide. It seems you need a subpanel. That of course increases installation cost.
You could probably use two mobile connectors if your panel supports them (they don't have to both full power) if you are using charge on solar.
davewill
Active Member
You can replace the 14-50 with a small load center (example below) then use two breakers installed there to do the runs to the wall connectors.
Square D Homeline 100 Amp 6-Space 12-Circuit Indoor Surface Mount Main Lug Load Center with Cover HOM612L100SCP - The Home Depot
The Square D Homeline 100 Amp 6-Space 12-Circuit Indoor Surface Mount Convertible Main Lugs Load Center is UL listed for residential and commercial power distribution. This load center is built with a
www.homedepot.com
Surprisingly, they didn't know that at the Tesla showroom. They just said you cannot charge two Teslas simultaneously.
It is clear to me from the replies how to charge both Teslas.
What I still don't have is a firm answer on is whether it works with "charge on solar." Did anyone get two wall connectors to work with "charge on solar"? Tesla support hints it's possible, but I want to make sure before making a big investment.
What I still don't have is a firm answer on is whether it works with "charge on solar." Did anyone get two wall connectors to work with "charge on solar"? Tesla support hints it's possible, but I want to make sure before making a big investment.
Charge on solar doesn't actually care about the EVSE (charging station). It works with non-Tesla charging stations (i.e. I have Tesla cars but not Tesla charging stations). It is entirely coordinated between the cars and the PV system. So, it should work. I've never had both cars plugged in at the same time with charge on solar enabled but I'll try to test that when the opportunity occurs, but I don't see why it wouldn't work since Tesla specifically called out this use case.
I can answer the two Tesla question. You can use a Neocharge to plug both in and schedule one at a time to charge. That's what I do. You can also charge both at a reduced rate, but I choose one at time.
It's that easy.
Oops, sorry. I didn't read all the way through to read that you figured out how to charge two at a time....
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No, actually very useful. Much cheaper than buying two wall connectors. I looked at the instructions, and it's doesn't say anything about being able to schedule charging. That is something you can do through the app?
davewill
Active Member
The cars themselves can schedule charging, so the EVSE doesn't really need the capability.
Yes. IMHO, the preferred way is to install a small sub-panel in the same spot as the 14-50 outlet. The sub-panel is only $35 and each 50A breaker is only $20. Then you wire each Wall Connector to its own breaker and set the Group to 50A max. The only drawback to this is that whenever a car is plugged in but not charging, it will keep 6A from the other car. So, the fastest any car can charge when both are plugged in is 34A. When both are actively charging, they will get 20A each.
Siemens EQ 125 Amp 4-Space 8-Circuit Main Lug Indoor Load Center E0408ML1125FU - The Home Depot
The Siemens Industry, Inc. EQ 125 Amp 4-Space 8-Circuit Main Lug Indoor Load Center is NEMA 1R rated for indoor use and intended for flush-mount applications. The center features a combination trim box
www.homedepot.com
Siemens 50 Amp 2-Pole Type QP Circuit Breaker Q250U - The Home Depot
Siemens offers a wide array of thermal-magnetic circuit breakers that are the key element for overload and short-circuit protection of your home's electrical system. To provide additional protection Siemens
www.homedepot.com
However, you could also use Polaris type connectors to hard wire both Wall Connectors to the single circuit. DO NOT use wire nuts.
Polaris 4-14 AWG Bagged Insulated Multi-Tap Connector, Black IPL4-3B - The Home Depot
IPL insulated multi-tap connectors are suitable for connecting 3-wires. Will not support combustion. Cold temperature rated to -45°C. Dual rated for use with copper and/or aluminum cables. 600-Volt. Not
www.homedepot.com
Perhaps, but I don’t know how well you can combine with ‘charge on solar.’ Having the schedule separate from the Tesla app with ‘charge on solar’ might make it easier.
