EV Chargers
How Much Electricity Does an EV Charger Use?
By Soundside ElectricalMarch 19, 2025Updated July 31, 20256 min read
An EV charger is one of the largest electrical loads you can add to a home. Understanding how much power it draws — and what that means for your panel — helps you plan the installation correctly and avoid surprises.
How EV Charger Loads Work
A Level 2 home charger draws 240 volts at 16 to 48 amps, typically on a dedicated 20 to 60 amp circuit. The circuit is sized larger than the charger's draw because chargers run continuously for hours, and code requires headroom for continuous loads.
How much energy the charger actually uses depends on how much you drive and your battery size — not just the charger's rating. A charger that can draw 48 amps doesn't draw 48 amps every time; it draws what the battery needs until it's full.
What It Means for Your Panel
Adding a 40–60 amp dedicated circuit is a significant load. Before installation, a load calculation confirms whether your panel can support it. If the panel is full or the service is undersized, a panel upgrade is done first.
This is why professional installation matters: a charger added without a load calculation can overload the panel and cause nuisance trips — or worse, create a safety hazard.
What to Know Before Installing an EV Charger
Know your panel's capacity, where the charger will mount (garage or driveway, indoor or outdoor), your EV's charging amperage, and whether you want a hardwired or plug-in unit. A load calculation and site visit answer all of this before installation.
If you're planning a second EV, mention it — we can size the circuit and panel for future capacity rather than redoing the work later.
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Frequently Asked Questions
A Level 2 charger draws 240V at 16–48 amps on a dedicated circuit. How much energy it uses depends on how much you drive and your battery size — the charger draws what the battery needs until it's full.
Not always. A load calculation determines whether your panel can support the charger's dedicated circuit. If it can, we add the circuit directly; if not, a panel upgrade is done first.
You can charge slowly on a standard 120V outlet, but it's slow and can overload a shared circuit. A dedicated Level 2 circuit is the right setup for home charging.
Get Started
Need an electrician in Wilmington, NC?
Call Soundside Electrical LLC or request service online. We handle residential and commercial electrical needs throughout Wilmington and coastal North Carolina.