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How to choose an EV charger
If you have never bought one of these, start on this page. Three questions decide almost everything, and none of them require you to understand amperage first.
By Sawyer V. · Published September 8, 2026
How this page is funded: we earn a commission if you buy through our Amazon links, at no extra cost to you. It does not change what we recommend, and we say plainly when the honest answer is to buy nothing. Full disclosure.
Every charger product page opens with numbers -- 48 amps, 11.5 kW, NEMA 4, OCPP -- and none of them help you decide anything. Here is the order that does.
Question 1: which connector does your car use?
Go and look at the charge port on your car. There are two possibilities for home charging in North America:
- J1772 -- a round connector with five holes. Used by nearly every non-Tesla EV. If your car has a CCS port (that same shape with two big round pins beneath it), the top part is J1772 and a J1772 charger plugs into it.
- NACS -- a smaller, sleeker connector. Tesla's, and increasingly other manufacturers'.
Buy the one that matches. If your household has one of each, buy J1772 and use the adapter that came with the NACS car. Plug types explained has the full picture.
Question 2: what can your electrical panel spare?
This is the question that decides both your charger and most of your budget, and it is the one people leave until last.
Open your electrical panel door. The big breaker at the top says 100, 150 or 200 -- that is your home's total electrical service. Count the empty slots too; a charger needs two adjacent ones.
| What you have | Likely outcome |
|---|---|
| 200 A service, free slots | A 48-amp charger is usually straightforward |
| 150 A service, free slots | Often fine. Worth a load calculation |
| 100 A service | Frequently tight. A smaller charger or load management may be the answer |
| No free slots | A subpanel is needed regardless of service size |
If you cannot answer this yet, buy an adjustable charger. That is precisely the problem the ChargePoint Home Flex and Wallbox Pulsar Plus solve -- install at what your panel supports today and raise it later.
Question 3: how long is the cable run?
Park the car the way you normally park it. Find the charge port. Run a tape from where the charger will go, down the wall, across the floor, to the port. Add three feet. That is your minimum cable length.
Home chargers run about 16 to 25 feet. This is the one specification you cannot change after installation, so do the measurement -- the method.
The one thing that is not a preference
The charger must be properly safety certified. Look for UL listed, ETL listed, or tested to UL standards by CSA. Not "UL certified components". Not "meets UL standards". This is a device that draws 40 amps continuously for hours in your garage, and many inspectors will reject an unlisted unit outright. Safety certifications.
Three chargers for the three common answers
Ranked for a first home charger. Every row jumps to the full write-up below.
| # | Product | Best for | Max output | Price |
|---|---|---|---|---|
| 1 | Emporia Level 2 EV Charger (Classic)A first charger, hardwired. J1772, 24 ft cable. | A first charger, hardwired | 48 A11.5 kW | Check price on Amazon#ad how we are funded |
| 2 | ChargePoint Home FlexHomes with an uncertain panel. J1772, 23 ft cable. | Homes with an uncertain panel | 50 A12 kW | Check price on Amazon#ad how we are funded |
| 3 | Grizzl-E ClassicHarsh weather and no app. J1772, 24 ft cable. | Harsh weather and no app | 40 A9.6 kW | Check price on Amazon#ad how we are funded |
What you can ignore
Apps and Wi-Fi (your car probably already schedules charging), peak kW claims above 12 kW (home circuits do not go there), brand prestige, and anything about charging networks (that is public charging, unrelated). Smart chargers makes the case honestly either way.
The chargers in detail
One for a known circuit, one for an unknown one, and one for no app at all.
1. A first charger, hardwired
Emporia Level 2 EV Charger (Classic)
Emporia · J1772 · 48 A / 11.5 kW · 24 ft cable
The safe default for a first home charger: 48 amps hardwired, a genuinely long cable, a NEMA 4 outdoor-rated case, and no subscription attached to the app.
What is good
- 48 A hardwired is the fastest tier most homes can realistically support
- 24 ft of cable reaches across a two-car garage without a fight
- NEMA Type 4 enclosure is rated for outdoor mounting
- Energy monitoring in the app with no subscription
What is not
- Drops to 40 A if you use the NEMA 14-50 plug rather than hardwiring
- The app is the only way to change the amperage setting
| Maximum output | 48 A / 11.5 kW at 240 V (hardwired) |
|---|---|
| Plug-in output | 40 A with the NEMA 14-50 plug |
| Connector | SAE J1772 |
| Cable | 24 ft |
| Enclosure | NEMA Type 4, indoor or outdoor |
| Certification | UL listed, Energy Star |
| Warranty | 3 years |
Skip this if: Skip it if you want a unit with no app or network connection at all. The Grizzl-E Classic is the simpler machine.
Specifications above are the manufacturer’s published figures. Source: Emporia Energy. We have not tested this unit — see how we pick.
2. Homes with an uncertain panel
ChargePoint Home Flex
ChargePoint · J1772 · 50 A / 12 kW · 23 ft cable
The most adjustable unit here. It can be set anywhere from 16 A to 50 A, which makes it the one to buy when you do not yet know what your panel will allow.
What is good
- Six selectable amperage settings from 16 A to 50 A
- Sold in both hardwired and NEMA 14-50 versions
- Rated for indoor or outdoor installation
- The app is mature and does not require a subscription
What is not
- 23 ft is a foot shorter than the longest cables in this group
- The 50 A setting needs a bigger circuit than most panels have spare
| Maximum output | 50 A / 12 kW at 240 V |
|---|---|
| Amperage settings | 16, 24, 32, 40, 48 or 50 A |
| Connector | SAE J1772 |
| Cable | 23 ft |
| Installation | Hardwired or NEMA 14-50 |
| Certification | UL listed, Energy Star |
| Warranty | 3 years |
Skip this if: Skip it if your circuit is already fixed and you just want the cheapest safe 40 A unit. You are paying for flexibility you will not use.
Specifications above are the manufacturer’s published figures. Source: ChargePoint, ChargePoint. We have not tested this unit — see how we pick.
3. Harsh weather and no app
Grizzl-E Classic
United Chargers · J1772 · 40 A / 9.6 kW · 24 ft cable
A cast-aluminum box with no app, no account and no firmware to update. If you want a charger that behaves like an appliance, this is the one.
What is good
- Cast aluminum NEMA 4 / IP67 enclosure, built for outdoor mounting
- No app, no account, no network dependency
- Amperage is set with physical switches, not software
- Protections for over-current, over-voltage, ground fault and over-temperature
What is not
- 40 A ceiling, slower than the 48 A units if your panel can take more
- No scheduling, so off-peak charging has to be set in the car
- The cold-flexible 24 ft cable is only on the Extreme Edition
| Maximum output | 40 A / 9.6 kW at 240 V |
|---|---|
| Adjustable | 16, 24, 32 or 40 A |
| Connector | SAE J1772 |
| Cable | 24 ft on the Extreme Edition |
| Enclosure | Cast aluminum, NEMA 4 / IP67 |
| Certification | UL certified |
| Warranty | 3 years |
Skip this if: Skip it if you want scheduled charging or energy tracking in an app. The Classic deliberately has neither.
Specifications above are the manufacturer’s published figures. Source: United Chargers, InsideEVs. We have not tested this unit — see how we pick.
FAQ
Questions people actually ask
How do I choose a home EV charger?
What is the most important thing to get right?
What if I do not know what my panel can handle?
Do I need to understand amps and kilowatts to buy one?
Sources
Where these numbers come from
Read next
Related reading
- Do you actually need a Level 2 charger?The honest test for whether you need a Level 2 charger, or whether Level 1 is enough.
- EV plug types, explainedJ1772, NACS, CCS and CHAdeMO: which plug your car has and which matters at home.
- The best home EV chargers, for people buying their first oneSix Level 2 chargers ranked for a first-time buyer, with an honest reason to skip each one.
- What EV charger installation actually costsItemized 2026 installation costs with published ranges, plus the one variable that changes everything.