See The Differences – Home Charging Tesla Model 3 Versus Model S


Not every Tesla EVSE is equal

When you buy a vehicle from Tesla, be it a Model S, Model X, or Model 3, you get a portable EVSE with it. That’s basically a simple device that allows you to charge your car from several different types of electrical outlets if there are no proper charging stations or high-power home charging station available. While they may look similar, apparently they are not necessarily the same.

So, what the difference? The main disparity is the speed at which it can charge your car. The i1Tesla Youtube channel helpfully documented the discrepancies and posted this helpful video, the main findings of which we’ll go over below.

Now, if you haven’t watched the video yet, you should. At seven minutes, it’s pretty short and points out a couple physical differences with the two pieces of equipment. Basically, what happens, though, is that he tries charging his Model 3 first with the portable EVSE from his Model S, and again with the one that came with it. Then, he later performs a short charging session with his Model S, using its proper portable EVSE. As we mentioned earlier, the difference all comes down to speed.

The Model S portable EVSE allows a full 40 amps of power, at 240 volts, to flood through its wires and charges the Model 3 at a rate of 33 miles per hour. When using the Model 3’s EVSE, however, only 32 amps were allowed to make their way to the battery, which turns to out be a rate of 27 to 28 miles per hour.

While the different charging speeds might not make impact the vast majority of owners who charge overnight, in some cases Model 3 owners may want to seek out a Model S portable charging cord to take advantage of that full 40 amp capability. Tesla, which refers to this item as a “Model S/X Corded Mobile Connector” offers it on its website for $520. A quick look at eBay tells us you can probably pick up from an auction site for somewhat less.

Source: YouTube

Categories: Charging, Tesla

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23 Comments on "See The Differences – Home Charging Tesla Model 3 Versus Model S"

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Tesla changed the UMC a while back to limit to 32 amps. This is not specific to model 3.

Correct, we just took delivery of a Model S last weekend that came with the Model 3 style connector set in the square pouch.

Was just about to bring this up.

I’m still charging my Model 3 at 120V (5 m/hour). Overnight, it easily replaces what I use in a day. I may install 240V when I get some free time, but not in a rush.

Good to know. I had my electrician recommend a new panel before installing the wall charger, so I have been holding off until I order.

You can use the dryer plug if you have,one,already in or close to the garage. Then share it with a,simple dryer buddy switch . It saves,all new,wiring or changing the main feed and power box in some cases.

I had one put in. It was like $500. He just ran it straight off the panel in the basement, which shares a wall with garage. Short run. 8 ft or so.

(⌐■_■) Trollnonymous

That’s how much it cost me to run a 60A circuit from the service panel on a 6ft run to a 14-60R and plugged my Juicebox 60A into it.
I thought it was quite expensive because I already had, new in the box, the Leviton 14-60R.

Congrats on your Model III, KDawg!

Thanks! Just got it ceramic coated too. So far so good.

I did that for years, but be careful if you are charging from a 120 VAC GFCI outlet (required by code in garages now I think). They can trip for no apparent reason, possibly leaving your range below what you need in the morning. There is an internal GFCI (called a CCID for some reason) in the EVSE, which is more reliable so hardwired EVSE are more reliable. The better EVSE in the US have four automatic retries if the CCID trips, so you are almost never surprised by a failed charging session. (EVSE for Europe do not allow auto retry, one of the few differences.)

The long range model 3 can charge at 48 A, both portable EVSEs can’t max it out. You need the wall charger for that.

(⌐■_■) Trollnonymous

“only 32 amps were allowed to make their way to the battery”

Boooooo……..IMHO, that’s a step backwards.

I have a 40amp juicebox that i installed for my leaf and volt. It charges my model 3 at 37 miles an hour. Was surprised!

Good to know that my 5-year-old GE WattStation can charge pretty much any EV. It is also 40amp.

From a practical standpoint it doesn’t matter. A 32A EVSE will fully charge any car overnight, if you assume 220V then you can get 85KW in 12 hours, at 240V it’s 92KW in 12 hours. Nothing wrong with installing a 40A EVSE but it won’t make any difference to your life, maybe it will be a little worse for the battery’s life but I doubt that the difference is significant. For most daily use, unless you drive a taxi, you’ll only use 10-15KW in a day so it really doesn’t matter.

That makrs no fukin sense. Whto the hell sleeps 10-12hrs?

I can charge from when you get home at the end of the day, until you leave the next morning. It does not need to charge only while you are sleeping.

And 12 hours would only be necessary if you drove almost 300 miles that day.

Sleeping is not a requirement for charging. Don’t worry, you can sleep 7 hours and watch TV the other 5 and get your battery full. Point is, this is plenty of charging speed. I have x10 less and i’m fine.

I have both Gen 1 and Gen 2 UMCs for my Model 3. I’m using the Gen 1 and charge at 40A. While charging it gets warm but not so much I can’t touch it. I keep the Gen 2 in the frunk for emergencies.

Yeah this discussion actually should be about the change in the charging cord, which Tesla now uses for all models it currently sells. So 32 or 40 depending on vintage EVSE cord you have, or 48 with the j1772 adapter and your own wallbox. But the base ‘3SR’ will be 32 amperes max – same as the Bolt ev. Or ‘3LR’ owners COULD buy a tesla wall box (HPWC) and charge at 48 amperes.

Of course since we are talking about home charging you can pick up the Tesla wall charger for around $500 and get more amperage than just about any other charger on the market at much less of a price. The Tesla wall charger is capable of up to 80 amps maxing out the model 3 at 44 mph and the Model X and S over 50 mph.

The Tesla Gen 2 mobile connector is actually very good value for non-Tesla owners if you already have a JDapter Stub/TeslaTap/Tesla-to-J1772 adapter. Assuming you already have the adapter, the $300 price tag for a 32 amp capable unit is a sweet deal. Even if you don’t have a JDapter (costs $239), $529 for a 120v/240v portable, 32 amp capable EVSE is still a very good deal.
I picked up a Gen 2 MC for my Bolt, and will be having a NEMA14-50 outlet installed in my garage so I can charge my Bolt @7.2 kW.