A Mobile EVSE is just like a regular EVSE that you install in your house, except that you can take it with you in your car. This allows you to charge at your destination when taking a long trip.
At a minimum, a mobile EVSE allows you to plug into a regular household 120V receptacle. Over 16 hours of overnight charging, you could get 48 miles of range this way. But as the Destination article shows, there are potentially a lot of other higher power receptacles you could plug into including receptacles for an electric dryer, an air conditioner, a stove, an RV hookup, or a welder plug (the Receptacle Identification page shows what the receptacles look like).
Here's how fast you can charge using various receptacles (typical values, charge time depends on your EV, exact voltage, etc.):
|Receptacle||Volts/Amps||Typical Miles/Hr||Miles over 16 hours|
|20A Household receptacle||120V/20A||5||80|
|30A RV (TT-30 receptacle)||120V/30A||7||112|
|20A NEMA 6-20 (AC, Table Saw)||240V/20A||10||160|
|50A (RV or Welder)||240V/50A||25||400|
Most regular EVs (except for Tesla, see sidebar), come with a basic 120V mobile EVSE. Following is a list of more capable mobile EVSEs that will allow you to charge at higher rates.
Model S, X, 3 and Y Tesla cars (but not the Roadster, see the Roadster specific page) all come standard with a very capable mobile EVSE called the Mobile Connector (it used to be called the Universal Mobile Connector, or UMC). It is so capable that many Tesla owners use it as their primary EVSE in their home, however I recommend that you buy the Wall Connector instead for home use.
The Mobile Connector comes with two adapters to plug into either a 120V/15A household receptacle, or into a 240V/50A NEMA 14-50 RV receptacle. Tesla (and other third parties) also sell numerous adapters to enable connecting to any electrical plug you might run into (click here for Gen 1 Tesla adapters, and here for Gen 2 Tesla adapters).
The included mobile EVSE for newer Volts and Bolts from 2016 model year on is actually a 240V capable EVSE. While it only comes with a hardwired 120V/15A plug, you can plug it into a "pigtail" adapter and charge at 240V/12A instead of 120V/12A. This will give you more than double the charge rate. Instead of about 50 miles of added range overnight, you could gain 110 miles of range over 16 hours.
The Volt/Bolt Adapters page shows how to make these pigtails.
eMotorWerks' flagship EVSE, the Juicebox, can also easily be used as a mobile EVSE. They sell the Juicebox with a NEMA 14-50 240V/50A plug which can then be plugged into a variety of plug adapters to plug into a variety of electrical sources. The Juicebox order page shows adapters you can purchase, and you can also make your own if you can't find the exact adapter for your needs.
EVSEAdapters has a nice small capable mobile EVSE. It can charge at both 120V and 240V, from 12A all the way to 32A. Buy the version that has a universal 14-30 and 14-50 plug. You can then buy the 10-30 to 14-50 adapter (and/or make or buy other adapters), and you'll have a very capable mobile EVSE. Plus, it's pretty inexpensive too. Just remember to set it at the appropriate amperage when charging.
AeroVironment makes a product called TurboCord. It can charge at both 120V and 240V, but it is limited to 16A at 240V (as opposed to the other solutions above which can charge all the way to 40A at 240V). If you own a 2016 or later Volt or Bolt, it probably isn't worth it as your included 120V mobile EVSE can actually charge at 240V/12A with the use of a simple pigtail adapter. But this is the cheapest (and smallest) mobile EVSE and might be adequate for some uses.
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