3.8 kW EV Charger Reviews

Because power equals voltage times current, 3.8 kW runs on 240V while 1.92 kW runs on 120V. The 3.8 kW charger draws 15.8 amps at 240V, which works out to 3.79 kW. The 1.92 kW charger draws 16 amps at 120V, which works out to 1.92 kW. Almost identical amperage, but nearly double the power because of the voltage difference. This is why voltage matters more than amperage when comparing chargers across the Level 1 / Level 2 boundary.

Sometimes, but not directly. Most U.S. residential dryer circuits are 30A 240V on a NEMA 14-30 outlet, which is a different plug pattern than a 3.8 kW charger needs. You can use the dryer circuit if the dryer is removed and the outlet is replaced with the correct NEMA pattern (typically 6-20), or if you use a manufacturer-approved splitter that interlocks so both the dryer and charger cannot run at once. Never use a generic Y splitter on a dryer circuit, as code violations and breaker trips are guaranteed.

Yes, in most U.S. jurisdictions. Any new dedicated 240V branch circuit requires a permit and inspection because it involves a new breaker, new conductors, and a new receptacle or hardwired termination. If you are using an existing 240V circuit and simply swapping the outlet pattern, a permit may still be required depending on your local Authority Having Jurisdiction. Always check before starting work. The permit fee in most jurisdictions is 50 to 150 dollars today.

Quieter than higher kW units. At 15.8 amps,s the internal contactor closes once at session start and remains closed for the duration. There is no continuous switching noise. The only audible sound is the cooling fan, which runs at a low speed because the unit is not stressed. Most 3.8 kW chargers are essentially silent in normal use, which matters if the charger is installed near a bedroom or living space.

Partially. The conductor and breaker for a 3.8 kW charger (12 AWG, 20A two pole) are too small to support higher kW tiers without rewiring. If you upgrade to a Tesla Model Y or Lightning later and want 9.6 or 11.5 kW charging, you will need to pull new conductors and install a new breaker. For full future proofing, install 6 AWG conductor and a 60A two-pole breaker now, even if you only run a 3.8 kW charger on it for the first few years. The incremental wiring cost during a single install is much less than redoing the work later.

Not at the same time. A 3.8 kW charger has one J1772 output and one EVSE control circuit, so it can only communicate with one car at a time. There are smart splitters on the market that switch between two cars, but they essentially make both cars wait their turn rather than charging simultaneously. For genuine simultaneous dual EV charging, you need either two separate chargers or a single charger with two outputs (like the Grizzl-E Duo, which sits in a higher kW tier).

Because manufacturers standardize on the NEMA 14-50 plug across multiple kW tiers to simplify SKU management, a 3.8 kW charger with a 14-50 plug still only draws 15.8 amps continuous, regardless of the larger plug. The downside is that the 14-50 plug expects a 50A circuit, so plugging a 3.8 kW unit into an oversized circuit wastes installed capacity. The upside is that you can later upgrade to a higher kW unit on the same outlet without replacing the wiring.

Yes, and the math works out cleanly. A 3.8 kW charger needs about 4.2 kW of solar production, accounting for inverter losses. Most 5 kW residential solar systems easily cover this during peak sun hours. The catch is timing: solar production happens during the day while most EV charging happens overnight. To charge directly from solar at 3.8 kW, you either need battery storage that can deliver 4 kW continuously, or you need to charge during the day, which only works if your car is home during daylight hours.

A 100-amp main panel can support a 3.8 kW charger as long as the total load calculation per NEC 220.83 stays within the panel's capacity. For a typical U.S. home with an electric range, electric water heater, and central AC, a 100A panel may already be close to capacity, and adding a continuous 15.8A load could push the calculation over the limit. The 3.8 kW tier is the lowest Level 2 charger that often works on existing 100A panels without an upgrade, which is the main reason this tier exists at all. Confirm with a licensed electrician before installing.