WOLFBOX WE40 40A Level 2 EV Charger: features, specs and who it suits

The WOLFBOX WE40 is a Level 2 electric vehicle charger for home use. It delivers up to 40 amps at 240 volts through a standard J1772 connector and plugs into a NEMA 14-50 outlet, with a 25-foot cable and an app for scheduling. Here is what its specs mean and what to sort out before installing one.

Level 1 and Level 2 charging

Most EVs come with a Level 1 cord that runs from an ordinary 120V household outlet. It is slow: typically only a few miles of range for every hour plugged in. A Level 2 charger runs at 240V, the same supply used by electric ranges and dryers, and can deliver several times more power.

At 40 amps and 240 volts, the WE40 can supply up to about 9.6kW. WOLFBOX says that adds up to 38 miles of range per charging hour, about seven times faster than a Level 1 charger. The real figure depends on the car: its onboard charger sets the maximum rate it will accept, and efficiency varies from model to model. For typical daily driving, a few hours of Level 2 charging overnight is usually enough to top up.

The plug, the circuit and installation

The WE40 plugs into a NEMA 14-50 outlet, a four-prong 240V receptacle. WOLFBOX says it should be installed on a circuit breaker rated at 50 amps or greater. Under widely used electrical rules, EV charging counts as a continuous load, so a circuit is sized above the charger's current; a 40-amp charger on a 50-amp breaker follows that pattern.

A dial setting sets the charging current to match your home's distribution panel; WOLFBOX describes this as a way to reduce the risk of overloading the circuit. Have a qualified electrician check your panel's capacity, install or inspect the outlet and circuit, and set the dial. Follow local electrical codes and permit rules, and the manual.

Certifications and listed protections

WOLFBOX lists CSA and FCC certification and says the charger meets UL 2594 standards, which cover electric vehicle supply equipment. It lists eight electrical protections, including leakage current, overcurrent and short circuit, along with internal temperature monitoring and a flame-retardant design rated to 950°C.

The housing is NEMA 4X, a classification for enclosures that keep out dust, rain and hose-directed water and resist corrosion. Check the manual for approved mounting locations. WOLFBOX also mentions round-the-clock customer support.

Three ways to start charging

Charging can start from the app, from an RFID card, or simply by plugging in. RFID cards are handy when several drivers share one charger. In the app, you can schedule up to four groups of charging sessions, each with three time slots, set custom charging times and adjust the amperage. Scheduling is useful if you want the car to charge at set times, such as overnight.

Vehicle compatibility

The WE40 uses the J1772 connector, the standard Level 2 plug in North America, and works with J1772 electric and plug-in hybrid vehicles. Cars with a NACS charging port need a NACS adapter. The 25-foot cable reaches around obstacles and into tight parking spots.

What to check before you buy

• Your electrical panel: confirm with an electrician that it can take a 50-amp circuit.
• The outlet: a NEMA 14-50 receptacle, installed to local code.
• Your car's port: J1772, or a NACS port that needs an adapter.
• Your car's onboard charger: it sets the actual charging speed.
• Cable reach: measure from the mounting spot to the car's charge port.

The short version

• A Level 2 home EV charger delivering up to 40A at 240V, with a J1772 connector.
• Plugs into a NEMA 14-50 outlet on a circuit breaker rated at 50A or greater.
• Up to 38 miles of range per charging hour, by WOLFBOX's figures.
• App control, RFID card or plug-and-charge, with scheduling and amperage adjustment.
• Listed CSA and FCC certification, UL 2594 standards, eight protections and a NEMA 4X housing.

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