Electrical and Tesla newb here. Question...Main panel is only 110 volts and I have a sub panel in my detached garage that I could add a 30 amp breaker to. Right now I'm charging with 120v mobile connect getting 4mph which isn't terrible but not ideal kind term. At first I was going to install the wall charger (got a quote for $650 for the 30a and charger install) but now I think it'll be equal mph to a 14-30 outlet which should be cheaper right? How much mph will I get with both set ups? From what I've researched so far I can only get 24 amps max with either-or correct? Thanks in advance.
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14-30 Question.
- Thread starter Xire
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First question - which model Tesla do you have? Some models can only AC charge at up to 32amps, while others get 48amps.
I have a 2023 MYP that can take 48amps, and I put in a Wall Charger. The Wall Charger is on a 60amp circuit, so I can pull 48amps continuously.
A Mobile Charger on a 30amp breaker would take half of that, and thus be twice as slow charging. My car has a 74kw battery (I think), and if I'm done to 20% and charge to 80%, it takes 4-5 hours. A 30amp circuit will definitely get you a full charge overnight, and a half charge during the day if you needed a boost. I see a 30amp circuit as the minimum usable size, unless you have a really big battery pack, like a Cybertruck or a Ford Lightning or god forbid a Silverado or Hummer.
I have a 2023 MYP that can take 48amps, and I put in a Wall Charger. The Wall Charger is on a 60amp circuit, so I can pull 48amps continuously.
A Mobile Charger on a 30amp breaker would take half of that, and thus be twice as slow charging. My car has a 74kw battery (I think), and if I'm done to 20% and charge to 80%, it takes 4-5 hours. A 30amp circuit will definitely get you a full charge overnight, and a half charge during the day if you needed a boost. I see a 30amp circuit as the minimum usable size, unless you have a really big battery pack, like a Cybertruck or a Ford Lightning or god forbid a Silverado or Hummer.
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a 30amp outlet or a 30 amp wall charger will both deliver 24 amp charging to your car (provided you have a mobile connector (what people tend to call the charger) already, and buy the appropriate outlet for it.
Whether an outlet will be cheaper than the wall connector, will depend on your specific setup but the cost will be closer than you think. I dont understand what you mean by "main panel is only 110 volts"... but I am guessing you are trying to say what you main panel is in amps... 100 amps?
In any case, if you already own the mobile connector and plan to leave it in your detached garage, then you could get an outlet and get the appropriate connector for the mobile connector.
The outlet will need a specific type of breaker that is more expensive than a regular one (like a lot more expensive). The wall connector wont need this specific type of breaker, it will only need a regular one thats cheap. The outlet itself is cheaper than the wall connector, but you should get a quality one instead of the regular home depot / lowes leviton branded one (that the electrician will likely pick up unless you specify or order a different one yourself).
Either works, though, and you will end up with the same charging speed for both since you are talking about 30amps.
Whether an outlet will be cheaper than the wall connector, will depend on your specific setup but the cost will be closer than you think. I dont understand what you mean by "main panel is only 110 volts"... but I am guessing you are trying to say what you main panel is in amps... 100 amps?
In any case, if you already own the mobile connector and plan to leave it in your detached garage, then you could get an outlet and get the appropriate connector for the mobile connector.
The outlet will need a specific type of breaker that is more expensive than a regular one (like a lot more expensive). The wall connector wont need this specific type of breaker, it will only need a regular one thats cheap. The outlet itself is cheaper than the wall connector, but you should get a quality one instead of the regular home depot / lowes leviton branded one (that the electrician will likely pick up unless you specify or order a different one yourself).
Either works, though, and you will end up with the same charging speed for both since you are talking about 30amps.
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I'm confused by the first part, main panel being 110 volts. I'm pretty sure your main panel is not 110 volts. It sounds like there is some limitation you are trying to convey. Is this your assessment or an electrician? Something is getting lost in translation.
Depending on where you are, $650 for new 30A circuit and presumably a charging station install is pretty reasonable.
A 14-30 outlet will have 30A breaker so yes, the maximum charging rate is going to be 24A (80% of 30). Installing an outlet versus hardwiring an EVSE (charging station) in my opinion takes roughly the same amount of effort. So, the electrician costs should be quite similar. Permit costs might be different. For a hardwired station you will presumably need to buy a new one.
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That still doesnt make sense. Perhaps you mean the main panel in the house is 100amps not 200amps, so only 30amps is available for the charger?
Or, you mean that there isnt space for a 240v circuit in the main panel?
The main panel cant "be 110v vs 240v", but I am not trying to be mean or anything, just tell you why people are confused at that statement.
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I have the same...23 mylr. Ok my sub panel only allows me 30a so it's either that with mobile or wall or stick with 120v outlet and get 4mph which I sunny want to do long term. I prefer 30 amp install but trying to see what's more effective and efficient the 14-30 or wall charger.
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Ahhhh yes sorry 100 amps and only 30 is available in my sub panel
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yay, progress.
Why do you do you think you can't add to main panel, but you can to your sub panel?
Is it a space issue?
Did someone do a load calculation? By definition, the power from the sub panel comes from the main panel. A lot of people make the mistake of just adding up the circuit breakers and believe that number has to be below the panel rating. It doesn't work that way. Similarly, just because you have room for a breaker doesn't you add another one.
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if things are done to code, the outlet would require a GFCI breaker, while the wall connector would not require this breaker, since its a hard wired device.
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Looks like the original poster already has a mobile connector, so would see reduced cost with the plug-in mobile connector method (need the 14-30 plug for the mobile connector, rather than the entire mobile connector).
Buying all new, there is not a lot of cost difference between the wall connector and the receptacle + mobile connector methods. But the cost comparison can change significantly if some part for one of the methods is already there.
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Good question. That's what the tech said. Here are pics on both panels
Attachments
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Yes I have mobile connector but not the 1430 connector yet.
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A good electrician can shuffle things around your main panel to make room for 240V breaker. If the panel supports it, slim tandem breakers can also be used to make room.
On the other hand, if the detached garage is where you park and charge then it seems like the ideal place to setup for charging.
Your choices are
Get a 14-30 outlet installed, assuming your jurisdiction requires GFCI as @jjrandorin, noted that will cost about $50-150 more for just the breaker. You will need $45 for the adapter 14-30 adapter.
Hardwire a wall connector, around $450 for the hardware. The electrician may charge for configuring it (although you should be able also do it yourself). If you do go down this route, make sure it is configured correctly to match the size of the breaker it was installed with.
The actual wire pulls for either option is the same. Both will be on a 30 A circuit
So, mobile connector route saves you around $250-300. If you had to buy the mobile connector, they would be very close to the same.
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First off if apples to apples charging parameters it doesn't matter if it is a wall connector or mobile connector since they charge at the same rate. A 30A wall circuit charging at 24A max gives you the same mph whether that is the wall connector or mobile connector. 24A charging gives you about 5.7 kw which is about 22 mph for the Model Y. In your case since you have the mobile connector already, you can just use that.
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I'd want to check the conductor size leading out to the garage subpanel. It >might< be big enough for 30 amps. (Trust but verify, even for professionals' work).
I'd want someone to do a load calculation for that main panel. It looks already on the edge of overloaded.
I'd want someone to do a load calculation for that main panel. It looks already on the edge of overloaded.
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