AUTEL Maxi US AC W12-L-4G
AUTEL Maxi US AC W12-L-4G is a Level 2 home EV charger from AUTEL with up to 50 A (12 kW) output and a J1772 connector — 25 ft cable, networked smart charging.
Our take
The cellular variant in AUTEL’s 50 A line, and the radio shows up in the meter: 4.68 W at idle is among the highest in the 20-model 50 A class, well above the 3.47 W median and about 41 kWh a year. Cellular connectivity earns that penalty only if the charger sits somewhere Wi-Fi genuinely cannot reach — a detached garage or a remote parking pad. Otherwise the Wi-Fi siblings do the same job for less standby. Output is the standard 12 kW on a 65 A circuit with a 25-foot cable.
- Best for: Detached garages and parking pads outside household Wi-Fi range.
- Trade-off: Cellular radio pushes idle draw near the top of its class.
| Connector type | J1772 |
|---|---|
| Max output current | 50 A |
| Max output power | 12 kW |
| Input voltage | 240 V |
| Wi-Fi / app connected | Yes |
|---|
| Cable length | 25 ft |
|---|
| ENERGY STAR certified | Yes |
|---|
| Standby power draw | 4.68 W |
|---|
How fast does the AUTEL Maxi US AC W12-L-4G charge?
Real charging speed is the lower of the charger's 12 kW output and each vehicle's onboard AC limit. Full-charge times and range added per hour on the AUTEL Maxi US AC W12-L-4G:
| Vehicle | Real rate | 0–100% | Range/hr |
|---|---|---|---|
| Tesla Model Y | 11.5 kW | 6.5 h | 50 mi |
| Tesla Model 3 | 11.5 kW | 6.5 h | 56 mi |
| Ford Mustang Mach-E | 10.5 kW | 8.7 h | 37 mi |
| Chevrolet Equinox EV | 11.5 kW | 7.4 h | 43 mi |
| Hyundai Ioniq 5 | 10.9 kW | 7.7 h | 41 mi |
| Ford F-150 Lightning | 12 kW | 10.9 h | 29 mi |
EV compatibility
The AUTEL Maxi US AC W12-L-4G's J1772 connector plugs directly into 23 of the 29 EVs tracked in this database. The other 6 (Hyundai Ioniq 5, Tesla Cybertruck, Tesla Model 3, Tesla Model S, Tesla Model X, Tesla Model Y) work with it too — requires a J1772-to-NACS adapter (Tesla includes one with its vehicles).
Unsure which port your car has? See J1772 vs NACS for home charging.
Similar chargers
- Blink HQ200 (50 A)
- EvoCharge PRO (50 A)
- AUTEL Maxi US AC LW12 (50 A)
- AUTEL MaxiChager Single Charger (50 A)
- WOLFBOX E50 (50 A)
- Dunamis L2C40S (50 A)
Frequently asked questions
Is the AUTEL Maxi US AC W12-L-4G ENERGY STAR certified?
Yes, the AUTEL Maxi US AC W12-L-4G is ENERGY STAR certified for standby energy efficiency.
Does the AUTEL Maxi US AC W12-L-4G have Wi-Fi or app control?
Yes, the AUTEL Maxi US AC W12-L-4G is a networked charger with smart-charging connectivity.
What size breaker does the AUTEL Maxi US AC W12-L-4G need?
At its maximum 50 A output the AUTEL Maxi US AC W12-L-4G needs at least a 65 A circuit, per the NEC rule that continuous loads may use only 80% of breaker capacity.
Sources
- data.energystar.gov (retrieved 2026-08-17)