What to know before you install a Level 2 charger: charger types, circuit sizing, panel capacity, permits and charging on a Texas power plan.
Most EV owners do almost all of their charging at home, overnight, in the garage. The cord that comes with many cars plugs into a regular outlet, but at 120 volts it adds only a few miles of range per hour. For most households, a Level 2 charger on a 240-volt circuit is what makes an EV practical day to day. Here is what to know before you install one in a Katy or Houston-area home.
Level 1 uses a standard 120-volt outlet and typically adds about 3 to 5 miles of range per hour. That can work if you drive very little. Level 2 uses a 240-volt circuit, like a dryer or range, and typically adds roughly 20 to 45 miles of range per hour depending on the charger and the car. That is enough to refill most daily driving overnight.
A plug-in charger connects to a 240-volt outlet, usually a NEMA 14-50. It is easy to swap or take with you, but a 50-amp outlet limits charging to 40 amps, and the current electrical code requires ground-fault protection on outlets installed for EV charging. Outlet quality matters too: cheap receptacles can overheat under hours of continuous load.
A hardwired charger connects directly to the circuit. It allows higher charging rates, often up to 48 amps on a 60-amp circuit, has fewer points of failure, and is usually the better choice for a permanent installation, especially outdoors.
EV charging is a continuous load, so the circuit is sized at 125% of the charger's output:
Bigger is not always better. Many cars can only accept a certain rate on Level 2, and a 40-amp charger refills most daily driving overnight. We size the circuit to the car, the charger and what your panel can support.
A Level 2 circuit is one of the larger loads in a house, alongside the AC and the dryer. We run a load calculation before installing. Most 200-amp homes have room. On 100- or 125-amp services, the options are a smaller charger, a load management device that slows charging when the house is using a lot of power, or a panel upgrade.
In many Katy and Cinco Ranch homes, the panel is on a garage wall, which keeps the circuit run short and the cost down. If the panel is on the far side of the house, or you park in a detached garage or the driveway, the wire run gets longer and may need trenching or exterior conduit. Outdoor chargers need weather-rated equipment, and some HOAs have rules about exterior installations, so check before you buy a pedestal.
Inside city limits, a new 240-volt circuit for EV charging typically needs an electrical permit and inspection. In unincorporated areas the work still has to meet code and be done by a licensed electrical contractor. We pull the permit where required and schedule the inspection.
Schedule charging for overnight hours. Many retail electricity plans in Texas offer cheaper or free nights, and charging off-peak also keeps the car from competing with your AC on a summer afternoon. Most chargers and cars let you set a charging window in their apps.
When the panel has capacity and sits close to the parking spot, installation often takes a few hours. Longer runs, exterior conduit or a panel upgrade add time.
Most non-Tesla EVs have used the J1772 connector, and many automakers are moving to the Tesla-style NACS connector. Adapters bridge the two. Choose a charger with the connector that matches your car, or one that comes with an adapter.
Yes, with equipment rated for outdoor use and the right mounting and conduit. Hardwired chargers are usually the better choice outdoors.
Not always. A load calculation tells you whether your current service can handle it, and a load management device can make a charger work on a smaller panel.
Tell us your car, your charger and where you park, and we will tell you what the install involves. See EV charger installation, book online, or call 281-222-9591.
Electrical work is performed by Beede Electrical LLC, Texas Electrical Contractor License TECL 93748.
© 2026 Beede AC & Heating LLC. All rights reserved.
Electrical services by Beede Electrical LLC, TECL 93748.
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