It depends on which Tesla Wall Connector you have. (Eggers Electric installs home EV chargers in Loveland and across Northern Colorado.) Tesla’s Universal Wall Connector has a Tesla-style (NACS) plug plus a built-in J1772 adapter that docks on the side, so it can charge Teslas and most other EVs sold in the U.S. The standard Tesla Wall Connector has only the NACS plug, so it charges Teslas and EVs with a NACS charge port directly; other EVs need a compatible adapter approved by the automaker. Many automakers are switching to the Tesla-style (NACS, also called J3400) plug for new models, which makes a NACS charger a better long-term fit than it used to be.
The two plug types
- NACS (SAE J3400): the slim Tesla connector. Teslas use it, and many newer EVs from other brands use it or are switching to it.
- J1772: the round connector that most non-Tesla EVs sold in the U.S. have used for Level 2 charging.
Both are Level 2 at home. The charging speed comes from the circuit and the car’s onboard charger, not the plug shape.
Choosing a charger for a mixed-EV household
- One Tesla and one J1772 car: a Universal Wall Connector, or a J1772 charger plus a Tesla J1772 adapter for the Tesla.
- Only non-Tesla EVs: a J1772 or NACS charger that matches your cars, or a universal unit if you expect to switch brands.
- Two EVs charging overnight: ask about power sharing. Some chargers can share one circuit and split the power between two cars.
If a non-Tesla EV won’t start charging
Tesla’s own documentation describes a Compatibility Mode in the Wall Connector settings for vehicles that have trouble starting a session. Check the settings in the Tesla app and your car’s charging settings before you assume there is an electrical problem.
What the install involves
Every Level 2 charger, Tesla or not, needs a dedicated 240-volt circuit sized to the charger’s setting, a permit and an inspection. We check whether your panel has the capacity first. Wall Connectors are hardwired only; they never plug into an outlet. We set the charging current during setup to match your circuit, and since the charger has built-in ground-fault protection, no extra GFCI breaker is needed. More on EV charger installation.
Eggers Electric installs Tesla Wall Connectors and universal chargers for other makes.
Talk to a local electrician
Every Eggers Electric visit includes the repair, installation or service you called us for, plus the $89 Eggers Safety Inspection. A licensed electrician looks at your home and the work you need and gives you a written price before any work starts; the $89 is credited toward the job when you go ahead. We are locally owned in Loveland since 1973, rated 4.9 on Google with 400+ Google reviews, and every job is backed by our 2-year workmanship warranty. Call 7 days, 7am–8pm at 970-669-1883 or Schedule Service.
Frequently asked questions
Does a Tesla Wall Connector charge a non-Tesla EV?
The Universal Wall Connector does, through its built-in J1772 adapter. The standard Wall Connector charges NACS-port cars directly; J1772 cars need an adapter.
Is NACS the same as J3400?
Yes. SAE J3400 is the standardized version of the North American Charging Standard connector Tesla developed.
Is a Tesla Wall Connector plug-in or hardwired?
Hardwired only; it never plugs into an outlet. It connects to a dedicated 240-volt circuit, and the installer sets the charging current during setup to match the circuit.
Can two EVs share one charger circuit?
Some chargers support power sharing so two units split one circuit. We check whether your chargers and panel support it.