How to Find the Best Home EV Charger - Consumer Reports

It’s possible to recharge your EV or plug-in hybrid by simply using the supplied cable that came with the car and a nearby 120-volt outlet, the kind found in most North American homes and garages. But this method is very slow; every hour of charging will add only about 3 miles of range.

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For drivers who use their EVs daily, a 240-volt Level 2 wall charger—sometimes called electric vehicle supply equipment (EVSE)—is practically a must. It increases charging speeds to 25 miles of range per hour or more depending on the vehicle and charger combination. We think it’s also a worthwhile investment because charging at home is usually much cheaper than plugging in at public charging stations. And it’s clearly more convenient.

Owners of plug-in hybrids (PHEVs) may not need a 240-volt charger because PHEVs can run on gasoline when they run out of charge. And our tests have found that many PHEVs can recharge fully overnight on a 120-volt outlet. But models with larger batteries, such as the BMW X5, take more than a day; 120-volt charge times for PHEVs can be found in the Ratings and Specs section for each model.

Make sure the charger you buy has a connector that fits your vehicle. Most non-Tesla EVs manufactured before have what’s called a J connector, while Tesla vehicles come with a NACS connector, short for North American Charging Standard. Converters are available, although there are currently far more options to convert from a J cord to a vehicle with a NACS outlet than in the other direction. Some non-Tesla vehicles already come standard with a NACS plug, so keep that in mind if you’re planning to buy a new EV in the near future.

No matter which charger you buy, make sure it has a UL and/or ETL certification mark on the unit itself. This shows that it meets safety and quality standards. Be wary of brands you haven’t heard of, and avoid those with low ratings from owners. If something goes wrong with a charger, it could damage your vehicle or even cause a fire. If you purchase a NACS adapter, we recommend buying one from the same manufacturer who made your vehicle, even if it costs more than one from another brand. Otherwise, if something goes wrong, it may void your car’s warranty.

With that said, most chargers are pretty reliable. Fewer than 3 percent of survey respondents told us they had problems with their home chargers. The most common were the inability to connect to an app and chargers that stopped charging before the vehicle battery was full.

When shopping for a home charger, consider the following factors, roughly in descending order of importance:

Amperage: We’ve used 40- and 50-amp chargers, but some homes can accommodate 80-amp chargers. Although they cost more, they can nearly double the speed at which some cars charge at home.

Cable length: The length of the charging cable affects where you can mount the EVSE and how easy it will be to reach the car’s charging port. Remember that your next EV may have a charging port in a different location, and you’ll want to be able to reach it. Most cables are between 20 and 25 feet long, and we recommend going for the longest you can afford, usually 25 feet.

Cable management: It’s handy to have a hook to wrap the unused portion of the cable around. Otherwise, if the cable is scattered, it adds clutter in the garage, collects dust, and might cause someone to trip over it. The ability to place the holster for the connector away from the unit might add flexibility in a tight single-car garage. If your connector doesn’t come with a hook, a wall-mounted holder for a garden hose will do the trick and can be found at any hardware store. 

Ease of plugging/unplugging: We like to see a high-quality, substantial coupler that lets you smoothly and effortlessly plug and unplug into and out of the car’s port. A solid and secure holster is an advantage, and it gives you confidence that the coupler will stay secure. One is usually included with top brands. 

Location: Where you install your charger could determine how easy it is to plug in your car and how much the installation costs. If you have to dig a trench for wiring, even a few feet can add hundreds of dollars. Even indoors, you can save money by installing a charger closer to where electrical service already exists. Ideally, you’ll want to install your charger so that a cable can easily reach the car’s charge port whether it’s on the front, rear, left, or right of the vehicle. Otherwise, you might have to drag the cable across the car’s roof. Consult an electrician before getting your heart set on where a charger can go.

Size: Once you’ve determined where a charger should go, measure to see how much space you have. A wide wall charger or a thick one that sticks out far from the wall may encroach on space or your flexibility in placing it in the garage. Look at all placement options. For instance, a narrow unit might fit on the small strip of wall between two garage doors. 

Ability to delay charging via app: Many cars allow you to control the charging time from within the car or via an app, so you can benefit from cheaper off-peak electricity costs, depending on your utility company. If your car doesn’t have this feature, consider a charger that does. Remember that this functionality may not work if the company that manufactured the charger discontinues support. (That’s what happened when the company that made JuiceBox chargers left the U.S. Owners could still charge their cars, but they lost access to the JuiceBox app.

Weatherproofing (optional): For those without a garage, look for a charger that can stand up to inclement weather. Most are claimed to be weatherproof by manufacturers. If you plan to install yours outside, we recommend finding a charger with a NEMA rating of 3, which is a standard set by the National Electrical Manufacturers Association that defines how resistant a product is to environmental hazards. A NEMA 3 rating, which is common on most home chargers, means they’re resistant to nearly all ambient temperatures in addition to the rain, sleet, and snow that the average U.S. consumer would face. The Grizzl-E has a NEMA 4 rating, which means it’s even more watertight. Note that a charging cable can become brittle in extremely cold weather.

How Many Amps Do You Need?
The higher the amperage of a home charger, the faster the charge, but just how fast depends on the electrical system of your car and your home. First, you need to determine how much amperage your home’s electrical system can handle. An electrician can help you figure that out. We recommend at least a 32-amp charger.

Then check to see what kind of charge your vehicle can accept, a spec that can be found on CR’s vehicle model pages. For instance, a Hyundai Ioniq 5 has an 11 kW onboard charger, so it can benefit from a 48-amp charger. A Toyota bZ4X only has a 6.6 kW onboard charger, so it won’t benefit from charging at higher than 30 amps. Several newer EVs are capable of charging at 60 to 80 amps. For applications above 48 amps, it’s recommended that the EVSE is hardwired as opposed to plugged into an outlet like a clothes dryer. Don’t be swayed by low-priced chargers that might charge less quickly. We recommend avoiding 16-amp chargers entirely. Onboard charger size and amperage information can be found in the Ratings and Specs section for the EV you’re interested in.

Should You Hardwire or Plug In Your Charger?
It depends. A plug-in type benefits from portability. These chargers can be readily replaced as needed, and they’re easy to take with you when you move or even when you’re on vacation if you rent a home. But a plug-in charger may not be able to run at as high an amperage as a hardwired model, so it may charge a little bit slower. Some high-amperage chargers require hardwiring.

Should You Buy a Smart Charger?
Not necessarily. Most EVs, like those from Nissan shown below, allow you to view charging status and get notifications through the car manufacturer’s app, and smart WiFi-connected chargers tend to cost more up front. But many utility companies offer rebates only on WiFi-connected models, which can cover the added expense. 

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Do You Have Frequent Power Outages?
If you live in an area that has frequent power outages, charging might not resume once the power is back on, and you could be surprised to find out that your EV isn’t sufficiently charged when you’re ready to drive. Some chargers and vehicles require the user to manually restart the charging session after a power outage. In those situations, it may be helpful to get a smart charger that can send an alert to your if charging is interrupted, or buy an EV with a similar feature. If you have a generator for your home, consult an electrician to make sure it can handle charging an EV when the power is out.

kW: Kilowatt, or one thousand watts. This is the unit for electrical power. Multiply volts (240) by the amperage rating of your charger and divide by 1,000 to determine how many kW can be sent to your vehicle.

kWh: Kilowatt hour. A unit of energy that’s stored inside a battery, expressing the battery’s capacity. Think of a battery’s kWh capacity as the equivalent of how many gallons of gas a tank can hold.

Level 2 charger: A 240-volt charger that can be installed at home or in a public place. It adds 20 to 40 miles of charge per hour and can fully charge an EV’s battery overnight. Public versions can be free or cost money depending on the location and provider.

NEMA: National Electrical Manufacturers Association. A trade group that sets standards for electrical products, such as types of plugs.

Type 1 connector: Also called J, this is a type of charger plug used on many American and European EVs and PHEVs that aren’t made by Tesla.

NACS (North American Charging Standard) connector: Also called J, this is a combination AC/DC charging plug used on Tesla vehicles that’s being introduced on EVs from other brands. Adapters exist to convert between NACS and CCS.

UL Listed: It’s wise to pick an EVSE that’s UL or ETL (Edison Testing Laboratories) listed, which indicates it complies with safety standards established by nationally recognized testing labs. Every charger featured here has such a safety rating, indicated by a seal on the box, the owner’s manual, or the unit itself.

Voltage: A measure of the force that moves electrical current. At the same amperage, a 120-volt outlet moves electricity more slowly than a 240-volt outlet, so an EV will charge less quickly when plugged into a 120-volt outlet. That’s why you have to install a special kind of outlet to plug in a Level 2 EV charger.

Your Complete Guide to Choosing a Portable EV Charger

Welcome to this guide on purchasing an electric vehicle portable charger! As an avid EV enthusiast, I know just how important it is to have a reliable and efficient charger. In this article, I'll be sharing my tips on what to look for when purchasing a portable EV charger, and the benefits of having a variable amperage charger..

Firstly, let's talk about what a portable EV charger allows you to do. As electric vehicles become more popular, charging infrastructure is expanding rapidly. However, it may not always be convenient to use public charging stations. A portable EV charger allows you to charge your car from the comfort of your own home or any other location with a suitable (3-pin) socket and power supply. This means you can avoid the hassle of finding a public charging station, and also save money by taking advantage of cheaper electricity rates at home.

When it comes to purchasing a portable EV charger, there are several factors to consider. One of the most important is amperage. The amperage of a charger determines how quickly it can charge your car. A higher amperage charger will charge your car more quickly, while a lower amperage charger will charge more slowly.

However, there is a catch. In some cases, the supply may be the limiting factor. This means that if the power supply at your home or the location where you are charging is not strong enough, you won't be able to charge your car at the maximum amperage. In this situation, a variable amperage charger from 6amps through to 13amps can be beneficial. This allows you to adjust the amperage depending on the power supply available, and still charge your car efficiently.

Another important factor to consider when purchasing a portable charger is compatibility. Make sure to check that the charger you are interested in is compatible with your specific electric vehicle model. Some chargers may only be compatible with certain models, so it's important to double-check before making a purchase, and of course purchase a portable EV charger with the correct connector for your model, either a Type 1 portable EV charger or Type 2 portable EV charger depending on compatibility.

Cable length is another important factor to consider. Make sure to choose a charger with a cable length that suits your needs. A longer cable can be beneficial if you need to park your car further away from the power socket, while a shorter cable may be more convenient if you have limited space.

Portability is also a consideration. If you plan to take your portable EV charger with you on the go, look for one that is lightweight and easy to carry. Some chargers come with a carrying case, which can be useful for keeping the charger protected and organised.

Safety features are also important to consider. Look for a charger with overcurrent protection, which will prevent the charger from drawing too much power and causing damage to your car or the power supply. Over voltage protection is also important, as it protects your car's battery from overcharging. Overheat protection is another feature to look for, as it prevents the charger from overheating and causing damage.

In terms of pricing, it's important to consider your budget, but also remember that a higher-priced charger may have more features and better build quality.

In summary, purchasing a portable EV charger for your electric vehicle is a smart investment. It allows you to charge your car from the comfort of your own home or any other location with a suitable socket. When looking for a charger, make sure to consider the amperage, compatibility, cable length, portability, and safety features. And if possible, opt for a charger with variable amperage so you can adjust the charging speed to your needs. With a portable EV charger, you can enjoy the benefits of electric vehicle ownership without worrying about running out of charge.

For more Type 1 Charging Stationinformation, please contact us. We will provide professional answers.