EV Charger Installation Guide for Charleston Homeowners

What to Know Before You Install a Home EV Charger

If you’re considering buying an electric vehicle, or you’ve already brought one home, congratulations. EV ownership is growing fast here in the Charleston area, and we’ve installed a lot of chargers for local homeowners.

What most dealerships don’t explain is this: You will likely need a dedicated circuit at home to charge properly. And the “fastest charging possible” is not always the best or most practical option.

Let’s break this down simply.

Level 1 vs. Level 2 Charging

Level 1 Charging (Standard Outlet)

Level 1 simply means plugging into a regular 120V outlet in your home.

Best for:

• Very short daily drives

• 10–20 miles per day

• Backup charging option
  

Pros:

• No electrical upgrades required

• Lowest installation cost
  

Cons:

• Very slow charging (adds only a few miles per hour)
  

If you’re just driving around Mount Pleasant or making short local trips, this might work. But most homeowners quickly realize they want something faster.

Level 2 Charging (240V Dedicated Circuit)

Level 2 charging uses 240 volts and requires a dedicated circuit installed by a licensed electrician.

Most Level 2 chargers range from 20 amps up to 60 amps, and the amperage determines how fast your vehicle charges.

Here’s what that means in practical terms:

Circuit Size	Typical Charging Speed	Who It’s Good For
20A	Slower Level 2	Light daily drivers
30A–40A	Moderate speed	Many homeowners
50A–60A	Fastest home charging	High-mileage or daily drivers

Do You Really Need the Fastest Charging?

A lot of customers tell us: “I want the fastest charging possible.”

But here’s what we walk them through:

Your Driving Habits

If you drive 20–30 miles per day, a smaller circuit will recharge your vehicle overnight without issue. You don’t need 60 amps just to drive to the grocery store and back.

Your Electrical Panel Capacity

Your home’s panel has limits.

If you jump straight to a 60A charger, we may need:

• A panel upgrade

• Load calculations

• Service upgrades

That adds cost and complexity. In many homes, a 30A–50A Level 2 charger is an efficient and cost-effective option.

Your Budget

Higher amperage =

• Larger breaker

• Larger wire

• Potential panel modifications

That means higher installation costs. Often, the “middle range” option gives you everything you need without overbuilding your system.

Pro Tip: Charge at Night

No matter what size charger you choose, we strongly recommend charging overnight.

Why?

✔ Lower Utility Rates

Many power companies (including Dominion Energy in South Carolina) offer lower rates during off-peak hours.

✔ Lower Home Electrical Load

At night:

• HVAC demand is lower

• Appliances aren’t running

• The house is mostly idle

This reduces stress on your electrical system.

Most modern EV chargers are smart chargers. You can set them from your phone to start charging at midnight and shut off in the early morning hours.

Set it once and forget it.

Our Recommendation

If you:

• Drive short to moderate distances

• Don’t need rapid daytime top-offs

We typically recommend a 20A–40A Level 2 setup.

If you:

• Drive long distances daily

• Want maximum charging speed

• Have sufficient panel capacity

Then we’ll recommend explore 50A–60A options and make sure your system can safely handle it.

Final Thoughts

Buying an EV is exciting. But before installing the biggest charger available, ask:

• How far do I actually drive each day?

• Can my panel handle it?

• Is it worth upgrading my system?

• Would a mid-range charger meet my needs?

The right answer is different for every home.

If you’re in the Charleston, Mount Pleasant, Daniel Island, or surrounding areas and want an honest evaluation, we’re happy to help you determine the safest and most practical setup.

Because the goal isn’t just fast charging. It’s safe, efficient, and smart charging.

—Andrew Gloudeman

Master Electrician

Gloudeman Electric