How Far Can an EV Charger Be From the Electrical Panel?

There is no fixed maximum distance between your electrical panel and an EV charger - a long run is entirely doable. What changes with distance is voltage drop: the farther electricity travels down a wire, the more voltage it loses to resistance, so a long run needs thicker (and more expensive) wire to keep the charger working properly. This guide explains the trade-off and the cheaper ways around a far-flung install.

Voltage drop, not distance, is the real limit

Every foot of wire has a little resistance, and a continuous EV charging current makes that resistance bleed off measurable voltage. Too much drop and the charger sees low voltage, which can slow charging or trip faults. The common engineering target is to keep voltage drop under 3 percent on a branch circuit. As long as the wire is sized to hold the drop under that, the run can be long.

How distance drives wire size

The fix for a long run is simply heavier wire. A short 20-foot run to a 48-amp charger might use the minimum gauge; the same charger 100-plus feet away may need the conductors bumped up a size or two to keep the voltage drop in range. That extra copper is the real cost of distance - not a code prohibition, just a bigger wire bill. Your electrician runs the voltage-drop calculation for your exact distance and amperage; see wire and breaker sizing for the starting gauges.

Cheaper ways to charge far from the panel

• Use a charger with a long cable. Many units ship with a 24- or 25-foot lead - a long-cable charger can cover the last stretch so you do not have to run the (thicker, pricier) 240-volt circuit all the way to the parking spot.
• Lower the amperage. A 32-amp charger drops less voltage than a 48-amp one over the same distance and needs thinner wire - if you do not need the speed, a smaller charger makes a long run cheaper. See 32 vs 48 amps.
• Consider a sub-panel. For a detached garage or a far outbuilding, a feeder to a small sub-panel can be more economical than a single very long branch circuit - a call for your electrician.

The bottom line

Put the charger where it is convenient. Distance is a wire-sizing problem your electrician solves with a voltage-drop calculation, not a barrier - just budget a bit more copper for a long run, or use a long charging cable and a sensible amperage to keep the circuit itself short.