Sterling Electric is a certified installer for Tesla Wall Connector, ChargePoint, and Wallbox. Most home installs are a one day job. We do the load calculation, run the dedicated circuit, and leave you with a clean install that is safe to charge at full speed without compromising the rest of your panel.
We are certified installers for the three brands that hold up over time and have parts you can actually get in North Carolina. We will not install discount chargers from unknown brands. The cost of replacement when they fail is more than the savings on the unit.
Up to 48A charging for Tesla and J1772 with adapter. 24 foot cable, sleek design, built-in WiFi for OTA updates. Best for Tesla-only households or buyers planning to stay with Tesla.
Universal J1772 connector works with every non-Tesla EV (and Tesla with adapter). Adjustable from 16A to 50A so it works on smaller panels too. Strong app and energy reporting.
Smallest hardwired unit on the market, great for tight garages. Up to 48A. Works with every EV. Best build quality of the three for outdoor mounting in our climate.
An EV charger install is not complicated electrical work. But there are five details that separate a good install from a cheap one, and most of them are invisible after the cover goes on.
The biggest mistake we see on existing installs is undersized wire on a 48A circuit. NEC requires 6 AWG copper for a continuous 48A load. We see 8 AWG installs all the time because it is cheaper and easier to pull. It will work. Until it does not. Then you have a fire risk inside a wall.
The second biggest mistake is no load calc. A 200A panel does not have 60A available just because you can fit a 60A breaker into it. We do the calculation per NEC 220 before we quote, so you know whether your existing panel can actually carry the load you are about to add.
A 48A charger on a dedicated 60A circuit gives you about 35 to 44 miles of range per hour of charging on most modern EVs. That means a typical commuter can fill up overnight from nearly empty. If your panel can only support a 40A circuit, you still get about 30 miles per hour, which is plenty for daily driving.
Sometimes. If you have a 200A panel with reasonable existing loads, you can usually add a 48A EV circuit without an upgrade. If you have a 100A or 150A panel, or you already have heavy loads (heat pumps, electric heat, hot tub), you may need to upgrade. We do the load calc on the site visit and tell you for sure before quoting.
For a 48A install, hardwired is required by code. For a 40A install, you can use a NEMA 14-50 outlet, but we recommend hardwiring even at 40A because it eliminates the most common failure point in EV charging setups. The connection is more reliable and the cost difference is minimal.
Yes. All three brands we install have outdoor-rated versions. We mount in a weatherproof enclosure with the wiring run in conduit, never exposed. Most of our outdoor installs are on the driveway side of a garage wall. We can also install on a freestanding pedestal if needed.
The federal Alternative Fuel Vehicle Refueling Property Credit currently offers up to 30 percent of installation costs (capped at $1,000) for residential EV charger installs in qualifying census tracts. We can provide the IRS Form 8911 documentation you need. Talk to your tax professional to confirm your eligibility.
Yes. We do L2 fleet charging installs and DCFC (DC fast charging) for commercial properties. We have done multi-port installs for apartment complexes, employee parking, and retail. Talk to us about your project and we will scope it out from the panel forward.
Send us a photo of your panel and tell us which charger you are leaning toward. We will get you a written quote inside 48 hours, including the load calc and any panel work that might be needed.