Higher amperage isn't free — it costs more to install and needs more panel capacity. Here's how to right-size it instead of defaulting to the maximum.
Start with your vehicle's onboard charger limit
Every EV has a maximum rate its onboard charger will accept, regardless of how much power the circuit can deliver — installing a 60A charger for a vehicle that only accepts 32A wastes the extra capacity entirely. Check your specific model's onboard charger rating before assuming higher is better.
Match amperage to your realistic overnight charging window
We've broken out charging time by common amperage tiers — from 16A up through 60A — showing how much power and time each delivers. A 32A or 40A circuit fully replenishes most daily driving overnight for most vehicles; higher amperages mainly matter for very high daily mileage or multiple EVs sharing one charger.
Higher amperage costs more, both for the circuit and possibly the panel
A 60A circuit needs heavier wire and a larger breaker than a 32A circuit, and pushing your total panel load higher increases the odds a panel upgrade becomes necessary — see the installation cost calculator for how amperage choice affects total install cost.
Consider future needs, within reason
If a second EV or a higher-mileage vehicle is a realistic near-term possibility, sizing the circuit (not necessarily the charger itself) with some headroom can avoid a costly rewire later — but sizing dramatically beyond any realistic need just adds cost without benefit.
Frequently asked questions
Is it worth paying for a 60A charger if my car only accepts 32A?
Generally no — the extra capacity beyond your vehicle's onboard charger acceptance rate goes unused, so matching the circuit to your actual vehicle (with modest headroom for a possible future vehicle) is more cost-effective than maximizing amperage.
Can I run two EVs off one high-amperage circuit?
Not directly on a single charger, but some setups use a load-sharing device that splits available amperage between two charging points — worth asking an installer about if you have or plan to have two EVs.