Corded Mobile Connector vs. Gen 2 Mobile Connector

Corded Mobile Connector vs. Gen 2 Mobile Connector

I'm looking to get a new/second mobile connector to use as a semi-permanent EVSE for my Tesla (I rent, so can't install the Wall Connector, but do have a NEMA14-50 outlet available), and I'm confused by the pricing of the "Corded Mobile Connector" at $520 vs. the "Gen 2 Mobile Connector Bundle" at $300. The latter seems to be superior (has interchangeable cord ends), but is less than 60% of the price?

Am I missing something? Why would anyone buy the "Corded Mobile Connector"?

There's probably some durability advantage to having the fixed/permanent cord attached to the "Corded Mobile Connector", but does that outweigh the flexibility and lower cost of the "Gen 2 Mobile Connector Bundle"? Does the "Corded Mobile Connector" have something more included that's not obvious based on the information on the Tesla web store?

Rocky_H | 04. Oktober 2018

It's not just a durability difference. It's a power level difference.

The mobile connector is actually a 2nd generation mobile connector, and is limited to 32A output. The corded mobile connector is based on the 1st generation mobile connector and has a maximum output of 40A.

tcfila | 04. Oktober 2018

I've been thinking the exact same thing. What would the difference in miles/hour be? 5ish?

Rocky_H | 04. Oktober 2018

@tcfila, It's going to depend on what vehicle you're talking about, because the bigger less efficient vehicles like the X will have a slower "miles per hour" charging rate than the 3. I have an S, and at 240V 40A, it's about 29 miles per hour. I just run a ratio to scale it to other amp levels:
32A/40A = X mph/29 mph
So that would be about 23 mph, or 6-ish mph difference for the S. More for the 3 and less for the X.

bp | 05. Oktober 2018

It's easier to think in amount of battery charge added per hour.

A 14-50 adapter will charge up to 40A, which is about 9 KWhr per hour. For a 100 battery pack, it would take about 9 hours to go from 10% to 90% of charge. A Gen 1 UMC will also charge at 40A, using the 14-50 plug.

A Gen 2 UMC is limited to 32A, which is about 7 KWhr per hour. For a 100 battery pack, it would take about 11.5 hours to go from 10% to 90% charge.

Smaller battery packs (an S/X 75 or a 3 LR or SR) will take less time to charge.

We have an X 100D and S 100D in our garage. One is on an HPWC with 100A circuit and the other is using a 14-50 outlet with the connector (charging at 40A).

Bilbao | 15. Juni 2019

I purchased the corded-mobile-connector for my 5/1/2019 m3 for my permanent home charger.
It does power at 40amp continuous and up to 10KWhr per hour.

A bit pricey, but it allows me to leave my umc gen 2 in my car for road trips.

jv59 | 22. Juni 2019

Does it make sense to buy corded mobile connector for model 3? Is it going to charge faster then gen 2 mobile connector? | 22. Juni 2019

@jv59 - The M3 includes a mobile connector for 32 amps. You can buy an optional 40 amp mobile connector with fixed NEMA 14-50. The SR charger is limited to 32 amps, so buying the 40 amp mobile connector doesn't add anything for that model. Personally, I don't think it's worth buying the 40 amp MC, but it does charge 25% faster on the MR/LR.

evan.callicoat | 15. Juli 2019

I found a link to the CMC manual, which is surprisingly difficult to find a link to, but since I actually received my CMC in the mail today I can confirm this manual's imagery/descriptions match the device itself, so figured I'd link it here:

wundercar | 15. Juli 2019

I bought the Gen2 mobile connector so I could keep my original mobile connector in the car and not have to unplug and pack it up every time I go on an overnight trip. I have an S75D and it does charge a bit slower at 32 amps, but it really makes no difference at all; I still get the charge I need overnight.
Be aware, though, that the Gen2 only comes with a 5-15 adapter, You will also have to purchase a separate 14-50 adapter for another $35.

Techy James | 17. Juli 2019

@jv59 Your answer would depend on if you have SR+, MR, or LR version of Model 3. If you have SR+ your capped at 32 Amp max charging rate. So for the SR+ there would be no advantage of the Gen 2 Cable over Corded Mobile Connector as you would cap out at ~ 30 mph.
The MR (Discontinued) and LR can support 40 Amp Charging rate which would result in a charge rate of ~ 37 mph.
This is also a 3rd option and that is the Wall Connector that can take up to 60 amp and Charge at 48 amp which only the LR variants would benefit and that would result in charge rate of ~ 46 mph.
Since I already had the NEMA 14/50 adapter I use a variant of the Wall Connector with the 14-50 NEMA adapter. For me, it was best option A) $500 versus $520 cost. B) Electrician wanted extra $800 to wire for Tesla Wall Connector with 60 AMP circuit. C) It freed my Gen 2 Cable to store in car just in case I need a charger cord.

Techy James | 17. Juli 2019

If your interested in the Wall Connector with 14-50 NEMA Adapter it can be purchased in the Tesla Shop using link:
Note here have it email you when it's available as it tends to sell out quickly. | 17. Juli 2019

@Techy - I was told by a MR owner that it is capped at 32 amps as well. Only LR gets up to 48 amps (with a HPWC) and 40 amps with any MC (v1, v2). | 17. Juli 2019

I may not have been clear above. It is 40 amps on LR with MC Gen1, or MC Gen2 with non-removable NEMA 14-50 connector. The Gen 2 MC that comes with the car is limited to 32 amps on all cars.

john_jo | 05. November 2019

Ok - A lot of jargon here. I have the same basic question. I have a MR3 that came with a mobile connector that had both a 5-15 and 14-50 plug adapters. I have a 50 amp 14-50 outlet at home and get a charging rate of ~33miles/hr.
If I want a back up charging cord, why would I spend $520 for the Corded Mobile Connector vs buying the Gen 2 Mobile Connector Bundle for $275 and a Gen 2 NEMA 14-50 adapter for $35. The math seems wrong $520 vs $310 for same capability?

abramo24 | 08. November 2019

@john_jo The math seems very off. I'm guessing it has to do with availability? The Gen 2 mobile connector always seems to be sold out, pushing people to buy the more expensive, but less versatile cable if they need it now. | 08. November 2019

@john_jo - For your specific car (MR3) both cords will provide the same charging speed (i.e. limited to 32 amps), so there is no reason to buy the more expensive cable. The $520 cable only has a benefit to LR and Performance 3 cars, by offering 25% faster charging at 40 amps.

Resist | 03. Januar 2020

I'm using my Gen 2 mobile connector with the 14-50 adapter to my 14-50 outlet. I would like a faster charge but can't see paying $520 for the corded mobile connector and buying another Gen 2 mobile connecter that only comes with the 5-15 adapter for $275 doesn't get me a faster charge, it just frees up my cars cable. What I want is the corded wall connector but Tesla never seems to have them in stock anymore.

mda.feedbck | 04. Januar 2020

apps for mobile:

milesbb | 04. Januar 2020

@Resist, why not go with a wall connector where your 14-50 is located. There is a good chance that you can get away with using the existing wiring, only change the circuit breaker to 60 amps. That will allow you to charge at your cars full rated 48 amps. Double the improvement for a small increase in cost over the corded mobile connector.

Bentcypress | 15. Januar 2020

Don't buy the corded mobile connector for $520. Get a Gen1 mobile connector instead. I have the factory Gen2 that came with my M3 LR. With the Gen1 it charges at 32A which gives me like 30MPH. With the Gen1 it charges at 40A which gives me 38MPH and sometimes 39MPH so cuts a 4 hour charge to 3 hours. Gen1 connectors can be had fro around $275 on Ebay with both the 110V and NEMA 14-50 plugs.

jconto | 23. Februar 2020

I want to use a Gen 2 UMC with a 14-30 outlet adapter. Where do I buy the 14-30 adapter from?

wfickas | 26. Februar 2020

@jconto The Tesla online store has that adapter and various others: