Tesla Mobile Connector Gen 1 vs. Gen 2: Which Is Better?

Tesla mobile connectors – also known as UMC or Universal Mobile Connectors – are a kind of backup cable that every Tesla owner should have. Since 2018, Tesla has introduced the generation 2 connectors for its vehicles, but do you know how it’s different from the Gen 1 and which one is better? 

Gen 2 is better than Gen 1 because it comes with more adaptors, doesn’t overheat, has a plastic handle and sealed control button, creates a more solid connection to the adaptors, and is safer. Besides, Gen 2 is compatible with more models, and unlike Gen 1, it’s readily available to purchase online.

If you’re wondering about the difference between Gen 1 and Gen 2 Tesla mobile connectors, keep reading this article. We’ll look at each one independently then compare both to see which one is a better choice. 

Tesla Mobile Connector Gen 1

As the name suggests, Gen 1 was the first generation of Tesla mobile connectors introduced for all Tesla models produced between 2012 and 2017, including Model S and Model X. It allowed the Tesla owners to connect their cars to various outlets, including domestic sockets or campsite power outlets. 

However, it’s not prevalent anymore, and with the launch of Gen 2 and even Gen 3 of Tesla mobile connectors, it’s been almost phased out. It’s only used for pre-2018 Model S and Model X Teslas. Let’s take a look at its specifications.

As the names suggest, Gen 1 and Gen 2 are two different generations of Tesla mobile connectors which each one has its perks. However, Gen 1 isn’t available now, but Gen 2 can help more Tesla owners safely charge their cars with various types of outlets.

Gen 1 Tesla connector allows 2.3kW-3.7kW of power, but you can increase it up to 11kW with the optional extra 16A 11kW Red commando adaptor p/n 1024110-02-A or 1024110-00-D. Gen 1 mobile connector comes with a round bag for storage. It also contains a 13A 3-pin plug plus a 32A Blue Commando Socket. 

The Gen 1 Tesla mobile connector is rated as IP44, which shows it’s splash-proof. So, it’s safe if you leave it outside unprotected in the rain or if it’s not elevated.

On a somewhat similar note, I also wrote a detailed article about Tesla being able to charge in the rain or not. Check out these helpful hacks and let me know what you think!

Its user manual includes common faults, safety precautions, how to reset, and comprehensive fault codes, among others.

On the back of the Gen 1 mobile connector’s main brick, there’s also a reset button that you can use if it fails. It can be single or three-phased, and its cable is 6 meters or 20 feet in length. 

Tesla Mobile Connector Gen 2

The generation 2 Tesla mobile connector comes with all Model 3 Teslas and every Model S and X produced from 2018 onwards. It’s somehow an upgrade of the Gen 1 connector; that’s why they’re very much alike. However, they have their differences. Let’s see what its characteristics are.

The Gen 2 Tesla mobile connector allows 2.3kW-3.7kW of power as its standard output, but you can increase it up to 7kW with the optional extra 32A 7kW Blue commando adaptor p/n 1104948-00-B. Its storage bag isn’t circular anymore and is square.

As an added bonus to this article, I’ve created this easy-to-use charging calculator. Simply input your model, charging wattage, and charging percentage, and you will get the estimated time it will take to charge a Tesla in terms of hours. You can play around with numbers a bit just to see how charging time changes:

Two columns

Tesla Charging Calculator (Time):

Estimated Time It Takes To Charge Your Tesla

{{ item.label }} {{ item.converted }}

Your service request has been completed!

We have sent your request information to your email.
Issued on: {{ $store.getters.getIssuedOn }}
Payment method: {{ $store.getters.getPaymentType }}
{{ item.label }}: {{ item.converted }}

It also contains a 13A 3-pin plug – previously, it contained a 16A Blue Commando socket, but as of 2021, it’s not included anymore. Gen 2 connector is rated as IP44, indicating it’s splash-proof and can be left unprotected outside.

There’s also a complete list of fault codes in its user manual, containing common faults, and other safety considerations. Gen 2 doesn’t have a reset button on the backside of its main brick because it simply doesn’t need it.

The Gen 2 mobile connector is single-phase and offers automatic phase inversion. The cable is 20 feet (6 m) in length. 

On a somewhat similar note, I also covered the basics on How Many Amps Are Needed To Charge an Electric Car. Check out this informative and link worthy article!

Tesla Mobile Connector Gen 1 vs. Gen 2

Now that we know the specifications of each connector, let’s compare them and see in what ways they’re similar or different. 


Both have the same standard Tesla connector to plug into the charging outlets to offer more convenience. They also look very similar. The only difference is that the Gen 1 looks a bit curvier, while the Gen 2 has a sleeker design – it’s a newer generation, after all! 

Both connectors have a 20-feet (6 m) cable that seems to be enough for most situations. But if you find it short and can’t extend it, rethinking how you park your car may be helpful.

They also come with a J1772 connector – or some say, adaptor – which allows you to use all universal chargers and recharge your vehicle safely. 

Also check out this article that I wrote where I discussed if Teslas come with the Standard Mobile Connector. Tesla has again changed its mind about this. So what is actually included when buying a new Tesla?


The first noteworthy difference between the two is their packaging. While Gen 1 comes in a round bag, the Gen 2 packaging is square. It’s only a matter of a better design class. 

In Gen 1, the handle features a metal stainless steel replaced with a hard but nice-to-touch kind of plastic in Gen 2. The reason is that some overheating issues were reported in metal handles. 

They’re also different regarding the adaptors. While both connectors come with the NEMA 5-15 and NEMA 14-50 adaptors – as of 2019, there’s no NEMA 14-50 included with Gen 2 – their appearance is very different in the two generations. 

Gen 1 comes with a power outlet of 40 amps which allows the Model S and X owners to have an onboard charging of 40 or 80 amps with a single or a twin charger option. So, it maximizes the onboard charging rate and can give you a 29 mph (47 kph) range for Model S and around 25 mph (40 kph) for Model X. 

But Gen 2 has a power outlet of only 32 amps to the car because Tesla has decided to lower the average to eliminate the overheating issue. However, it perfectly matches the Tesla Model 3 onboard charging rate. 

The cladding on the Gen 1 connector’s cable is thicker than Gen 2, but both are the same length. Despite its relative thinness – which is due to lower amps and weight – Tesla promises it’ll work for at least 6 years. 

In Gen 1, the distance between the transformer and the adaptor is about 11 inches (28 cm), while in Gen 2, this distance is only around 7 inches (18 cm) which allows you to see the status indicator on its backside. 

Gen 1 has a NEMA 4x rating, but Gen 2 has a NEMA 3r Rating, which isn’t a big difference. NEMA is a standard rating system defined by The National Electrical Manufacturer Association (NEMA), which shows how an electrical enclosure can withstand different environmental conditions. 

Another important difference between the two generations is that Gen 1 comes with limited adaptors, and it has a regular transistor which doesn’t protect it from overheating. But Gen 2 offers more controllability with the circuit board chip inside the adaptor, which has a temperature sensor and a memory chip. 

Here’s a helpful video on Gen 1 and Gen 2 differences: 

Here’s a table that summarizes what we mentioned above: 

Gen 1 Tesla Mobile ConnectorGen 2 Tesla Mobile Connector
Compatible with pre-2018 Model S and Model XCompatible with all Model 3s and post-2018 Model S and X
2.3kW-3.7kW of power (up to 11kW with the optional extra 16A 11kW Red commando adaptor)2.3kW-3.7kW of power (up to 7kW with the optional extra 32A 7kW Blue commando adaptor)
Round storage bagSquare storage bag 
Comes with a 13A 3-pin plug + 2A Blue Commando SocketComes with a 13A 3-pin plug + a 16A Blue Commando socket (not included anymore since 2021)
Rated as IP44Rated as IP44
single- or three-phasedSingle-phase also offers automatic phase inversion
20 feet or 6 meters long cable20 feet or 6 meters long cable
Reset buttonNo reset button
Thicker claddingThinner cladding
NEMA 4x ratingNEMA 3r Rating
Limited adaptorsMore adaptor options
Overheating issuesCircuit board chip preventing overheating
A table comparing Tesla Mobile Connector Gen 1 vs. Gen 2

The Verdict: Gen 1 vs. Gen 2 Tesla Mobile Connector 

Gen 1 and Gen 2 Tesla mobile connectors are mostly similar, and there’s no significant difference between the two. The only thing that matters is their compatibility and some overheating issues in Gen 1. 

While Gen 1 is only offered for all the Pre 2018 Teslas, Gen 2 comes with all Teslas made after 2018, including Model 3, Model X, and Model S. Additionally, Gen 1 has some overheating issues, which are resolved in Gen 2 with the help of a circuit chip. 

Another noticeable thing to point out is that the overall connection in Gen 2 is much better and safer than Gen 1. Besides, the control button in Gen 2 is sealed to prevent water from getting inside. 

If you found this article helpful, feel free to give us a thumbs up and share it on your social media platform of choice below. You can also check out these 15 great gift ideas for yourself or a Tesla fanboy.

Contact Us if you have any questions or queries.

Erwin Meyer
Erwin Meyer

Thanks for visiting evspeedy.com. The goal of this site is to be a helpful resource for Tesla and EV owners as this is where my passion lies. I was a TSLA shareholder before the hype and still am. I also believe in Tesla’s speedy mission to accelerate the world to a sustainable future.