32A vs 48A Charging: Which EV Home Charger Is Right for You?

If you're comparing 32A vs 48A charging, it's easy to assume that the higher number is automatically the better choice, but that’s not always the case. Choosing between a 32A and 48A charger depends on your driving habits, your vehicle, and your home's electrical capacity, not just charging speed.

In this guide, we'll explain the differences between 32A vs 48A charging, compare charging speeds, installation requirements, cost considerations, and help you determine which option makes the most sense for your home.

What does EV charger amperage mean?

It’s important to know the difference between amperage and voltage when speaking about EV charging. Amperage (amps) refers to the amount of electrical current flowing from your EV charger into your vehicle, more amps generally means faster charging.

Voltage (V) is the electrical pushing power through the circuit. Most Level 2 home chargers use 208V.

The amount of charging power is calculated by multiplying amps by volts:

kW = Amps × Volts ÷ 1,000

For example, on a 208V circuit:

• 32A × 208V ÷ 1,000 = 6.65 kW
• 48A × 208V ÷ 1,000 = 9.98 kW

This means a 48A charger provides about 50% more charging power than a 32A charger on the same voltage.

Related: Understanding kW vs. kWh for EV Charging

What is a 32A EV charger?

A 32A EV charger is a Level 2 charger that can deliver up to 32 amps of electrical current. On a 208V circuit, that works out to approximately 6.65 kW of charging power.

A 32A charger is more than enough for many EV owners, particularly those who charge overnight. Even if you drive around 120 km in a day, a 32A charger can typically replace that energy in a few hours, leaving plenty of time to charge while your vehicle is parked overnight.

A 32A charger typically requires:

• A dedicated 40A breaker
• A 208V electrical circuit
• A hardwired installation

Hardwiring your EV charger provides a dedicated connection and avoids the potential issues associated with using the wrong plug or improperly installed receptacle.

Related: Level 2 EV Charger: Everything You Need to Know About a Level 2 Charging Station

What is a 48A EV charger?

A 48A EV charger is a higher-output Level 2 charger that can deliver up to 48 amps of electrical current. On a 208V circuit, that works out to approximately 9.98 kW of charging power.

Because a 48A charger provides more power, it can recharge a compatible EV faster than a 32A charger.

A 48A charger typically requires:

• A dedicated 60A breaker
• A 208V electrical circuit
• A hardwired installation
• An electrical panel capable of supporting the additional load (or a smart load management system)

Using the basic power calculation:

32A × 208V = 6.65 kW

48A × 208V = 9.98 kW

So, moving from 32A to 48A gives you approximately 3.33 kW more charging power.

That extra power can make a meaningful difference if you need to recharge quickly. However, if your vehicle sits at home for eight or more hours overnight, you may not need the additional charging speed.

32A vs 48A charging speed: Quick comparison

With a Level 2 charger, higher amperage means more charging power. However, the actual amount of range your EV gains depends on the vehicle's efficiency and onboard charger. 

 *Actual charging speed and range added per hour vary by EV model, battery size, efficiency, and onboard charger. 

How quickly do you actually need to recharge?

For example, if you drive 120 km in a day, a 32A charger can typically replace that energy in roughly four hours of charging. If your vehicle is parked at home overnight, that may be more than enough.

Someone who drives 120 km per day and leaves their EV at home overnight may have no reason to upgrade to 48A charging. On the other hand, a rideshare or delivery driver who needs to get back on the road quickly may benefit significantly from the faster charging speed of a 48A charger.

Can my electric vehicle handle faster charging?

One of the most common misconceptions is that installing a larger charger automatically means faster charging. Your electric vehicle's onboard charger determines the maximum AC charging speed.

For example:

• If your EV accepts up to 32A, installing a 48A charger won't make it charge faster.
• If your EV supports 48A AC charging, it can also charge safely from a lower-amperage charger, such as a 32A charger.
• A 48A-capable EV will only use the amount of current it is designed to accept.

Before purchasing a higher-powered charger, check your vehicle's maximum AC charging specification and consider how quickly you actually need to recharge.

Related: How To Charge Your Electric Vehicle Faster

Installation requirements for 32A vs 48A charging stations

Before your home EV charger installation, you need to understand the electrical and infrastructure requirements for each charger amperage type.

If you’re thinking of upgrading from a 32A charger to 48A, it often involves:

• Larger electrical wiring
• A higher-capacity breaker
• A hardwired connection
• Additional electrical capacity from the panel
• Smart load management if the panel has limited available capacity

These additional requirements can increase installation costs.

32A vs 48A charging: Which charger is right for you? 

The best charger depends on your driving habits, your vehicle, your home's electrical capacity, and how quickly you need your EV to recharge.  

How much does a 32A EV charger vs 48A EV charger cost?

There are several factors that determine the total cost of installing either a 32A or 48A charger, here are some things that can affect your overall installation cost:

• The distance between your electrical panel and the charger location.
• Whether your existing electrical panel has enough available capacity.
• The amount of wiring required
• Whether trenching or additional wiring is required.
• Whether smart load management can be used instead of upgrading the panel

In general, a 48A charger installation can be about 30% more expensive than a 32A installation when your electrical panel already has enough capacity. The additional cost comes from the larger wiring and higher-capacity breaker required.

It's often best to buy the charger you actually need rather than paying more for charging capacity you won't use. A 48A charger may also require a larger electrical panel, which can add a significant and unnecessary expense if a 32A charger already meets your charging needs.

Common electric vehicles by maximum Level 2 charging capability 

Your EV's maximum AC charging capability is an important factor when choosing between 32A vs 48A charging. If your EV supports 48A charging, it can also safely charge with a lower-amperage charger, such as 32A. A 48A-capable EV doesn't require a 48A charger. If you charge overnight and don't need faster top-ups, a 32A charger can still provide plenty of power for everyday driving.

The table below shows common EV models and their general Level 2 AC charging capabilities:

Need help choosing the right home EV charger?

At metroEV, we help homeowners choose the right charging solution based on their vehicle, driving habits, and home's electrical capacity. Whether a 32A charger is the perfect fit or a 48A installation makes more sense, our team can recommend the most practical and cost-effective solution for your needs.

Contact metroEV today to schedule a home charging assessment and find the charger that's right for your home.

Learn more:
How to Save on Electricity Costs When Charging an EV
Level 2 EV Charger: Everything You Need to Know About a Level 2 Charging Station
How Do I Get My Condo Building To Install An EV Charging Station In My Parking Spot?

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