People who search for a "40 amp EV charger" often assume it needs a 40-amp breaker, but it doesn't. Since a 40-amp charger draws a continuous load, the National Electrical Code calls for a breaker rated 25% above that figure. Below we rank the plug-in-friendly 40A chargers that suit the 50-amp circuit they truly require, and we straighten out the breaker-size confusion so you don't order the wrong parts.
| # | Charger | Key Spec | Score | Price |
|---|
| 1 | Grizzl-E Classic 40A
Best Overall | By far the least expensive entry on this list, and its 40A/9.6kW output is a genuinely fixed ce… | 9.6/10 | ~$299.99 |
| 2 | WenStorm Level 2 Portable EV Charger
Best 32A Plug-In Alternative | Although it plugs into a NEMA 14-50 outlet on the 50A circuit this guide assumes, it reaches on… | 9.2/10 | $219.99 |
| 3 | Lectron Portable Level 2
Best for Renters | Both the least expensive unit on this page and the only one built for travel, it is a handheld … | 8.8/10 | ~$249.99-$269.99 |
| 4 | Lectron V-Box Pro
Best for a Future Hardwire Upgrade | It plugs into a NEMA 14-50 outlet now and tops out at 40A, then moves straight up to its full 4… | 8.4/10 | ~$369.99 |
| 5 | Emporia Classic
Best Adjustable | Five settings (16, 24, 32, 40, and 48A, per Emporia's own help center documentation) can be adj… | 8.0/10 | $449 |
People who search for a "40 amp EV charger" often assume it needs a 40-amp breaker, but it doesn't. Since a 40-amp charger draws a continuous load, the National Electrical Code calls for a breaker rated 25% above that figure. Below we rank the plug-in-friendly 40A chargers that suit the 50-amp circuit they truly require, and we straighten out the breaker-size confusion so you don't order the wrong parts.
40-amp EV chargers by the numbers
The National Electrical Code's 80% continuous-load rule (Article 625.41 / 210.20(A): 40A / 0.8 = 50A) legally calls for a 50-amp breaker with a 40-amp charger. The same calculation places a 48A charger on a 60A breaker one step higher, and explains why a 40A breaker alone supports only a 32A charger and not 40A.
Adding roughly 25-32 miles of range every hour, a 40A/9.6kW charger easily handles the roughly 37 miles of daily driving found in federal travel data, using well under half of an overnight charging window.
Usually a 40A charger plugs into a NEMA 14-50 outlet, the same type found with RV hookups and electric ranges, so the installation typically involves only the outlet and the 50A circuit behind it instead of a complete hardwire job. Our NEMA 14-50 outlet guide covers the receptacle details.
Best 40-amp EV chargers at a glance
| Charger | Best for | Output | Connection | Price |
|---|
| Grizzl-E Classic 40A | Best overall | 40A / 9.6 kW | NEMA 14-50 plug or hardwired | ~$299.99 |
| WenStorm Level 2 Portable | Best 32A plug-in alternative | 32A / 7.7 kW (16/24/32A dial) | NEMA 14-50 plug-in only | $219.99 |
| Lectron Portable Level 2 | Best for renters | 40A / 9.6 kW | NEMA 14-50 plug-in only | ~$249.99-$269.99 |
| Lectron V-Box Pro | Best for a future hardwire upgrade | 40A plug / 48A hardwired | NEMA 14-50 plug or hardwired | ~$369.99 |
| Emporia Classic | Best adjustable | 40A / 9.6 kW (of 16-48A range) | NEMA 14-50 plug or hardwired | $449 / $479 |
1. Grizzl-E Classic 40A — Best Overall
Grizzl-E Classic 40A
Best Overall · ~$299.99
- By far the least expensive entry on this list, and its 40A/9.6kW output is a genuinely fixed ceiling rather than a higher-amp unit turned down.
- A DIP switch selects 16A, 24A, 32A, or 40A, so a single unit also fits a smaller circuit if the install lands at 30A or 40A and not the full 50A this guide assumes.
- The cast-aluminum NEMA 4 enclosure is fine for outdoor mounting, and with no app, Wi-Fi, or cloud account there is nothing to configure or to break down later.
- Our full Grizzl-E EV charger guide compares the Classic with the Wi-Fi-equipped Classic Connect and the higher-output Ultimate 80A.
- Equipping a company with chargers? Opening a free Amazon Business account gets you volume discounts and tax-exempt buying.
Check Price →2. WenStorm Level 2 Portable EV Charger — Best 32A Plug-In Alternative
WenStorm Level 2 Portable EV Charger
Best 32A Plug-In Alternative · $219.99
- Although it plugs into a NEMA 14-50 outlet on the 50A circuit this guide assumes, it reaches only 32A / 7.7 kW and is not a true 40A unit, so it works only when your EV's onboard charger accepts 7.7 kW or lower.
- Comes with a 16/24/32A dial and a 25-foot cable, and its control electronics sit in the connector handle instead of an inline box; offered in J1772 or NACS for the same $219.99.
- It is plug-in only, with no hardwire option and no app, and the 2-year warranty is one year shorter than Emporia's.
- Before you plug in at a continuous 32A, check our NEMA 14-50 outlet guide for details on the receptacle.
Check Price →3. Lectron Portable Level 2 — Best for Renters
Lectron Portable Level 2
Best for Renters · ~$249.99-$269.99
- Both the least expensive unit on this page and the only one built for travel, it is a handheld EVSE that comes with a carrying case and isn't meant for a permanent wall mount.
- It comes in two versions at different prices: the $249.99 Plug & Play model with LED status tracking, or the $269.99 Wi-Fi model, which adds app scheduling and kWh tracking.
- It has no hardwire option and no DIP-switch step-down, so it's strictly a 40A unit, which is the cost of being the lightest and most portable charger here.
- If you don't drive a J1772 vehicle, our full Lectron EV charger guide describes the Tesla/NACS portable variant.
Check Price →4. Lectron V-Box Pro — Best for a Future Hardwire Upgrade
Lectron V-Box Pro
Best for a Future Hardwire Upgrade · ~$369.99
- It plugs into a NEMA 14-50 outlet now and tops out at 40A, then moves straight up to its full 48A limit when an electrician hardwires it, so upgrading the circuit later doesn't require a new charger.
- Selecting 16, 32, 40, or 48A happens in the Wi-Fi app, which means that once the hardwire work is finished the step up is just a setting change instead of another purchase.
- Even with the higher ceiling, it costs under $370, less than any adjustable unit on this page that reaches a lower maximum.
- Want the outlet and the charger to show up before your electrician does? A free 30-day Amazon Prime trial provides two-day shipping on both.
Check Price →5. Emporia Classic — Best Adjustable
Emporia Classic EV Charger
- Five settings (16, 24, 32, 40, and 48A, per Emporia's own help center documentation) can be adjusted in the field, so one physical unit serves a 50A circuit set to 40A now and a 60A circuit set to 48A down the road, with no replacement needed.
- It carries the priciest sticker on the list, yet it is the one unit that can legitimately reach a full 48A later without a second charger.
- It is ENERGY STAR certified, UL listed, and NEMA 4 rated, and comes with a 25-foot cable and a 3-year warranty.
- For the Classic-versus-Pro comparison, see our full Emporia EV charger review.
Before you buy: confirm it’s really a 50-amp breaker
A 50-amp breaker is what a 40-amp charger requires, and not a 40-amp one. Because of the National Electrical Code's 80% continuous-load rule, a 40A breaker supports only a 32A continuous load, so if that is what your panel actually has, check our best 32-amp EV charger picks. A WenStorm Level 2 Portable on that same 40A breaker would run at its 32A setting.
Most models here connect to a NEMA 14-50 outlet, the receptacle also used for RV hookups and electric ranges. Our NEMA 14-50 outlet guide is worth reading before you assume your garage already has one. The WenStorm Level 2 Portable plugs into the same NEMA 14-50 outlet, so the receptacle check applies to it too.
Only the adjustable units (Emporia Classic, Lectron V-Box Pro) can move up to 48A after a circuit upgrade to 60A, whereas the fixed Grizzl-E Classic and Lectron Portable Level 2 never go beyond 40A. Whether that extra tier is worth the cost is the question our 40A vs 48A guide takes up. The WenStorm Level 2 Portable is also fixed to a 32A ceiling, with only its 16/24/32A dial to step down.
The bottom line
If you have or are installing a 50-amp circuit, the Grizzl-E Classic 40A (around $299.99) is the best 40-amp EV charger of 2026 for most buyers, being a truly fixed, no-app unit at the list's lowest price. Renters and people lacking a dedicated outlet should choose the Lectron Portable Level 2 (~$249.99-$269.99), which is made to travel and not to stay on one wall. The Lectron V-Box Pro (roughly $369.99) suits anyone expecting to hardwire an upgrade to 48A, and the Emporia Classic ($449/$479) is the most versatile, packing five amperage settings into one box for the charger's whole life. Whatever you select, settle the breaker first by reading our installation requirements checklist before ordering, and see our best home EV charger picks in case 40A is a tier below what your panel can handle. If you only need 32A, the WenStorm Level 2 Portable ($219.99) is the plug-in alternative worth knowing: it uses the same NEMA 14-50 outlet with a 25-foot cable and J1772 or NACS options. It tops out at 32A / 7.7 kW, so it is not a true 40A unit, and it has no app and no hardwired version. For an EV whose onboard charger accepts 7.7 kW or less, WenStorm costs less than every other charger here.
Check Grizzl-E Classic price on Amazon →
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Frequently Asked Questions
Which 40-amp EV charger is best?
Most buyers will find the Grizzl-E Classic 40A to be the best 40-amp EV charger: at around $299.99, it is a rugged cast-aluminum unit with a dial for adjustment and no app or cloud service that could fail. Anyone renting or without a dedicated outlet should pick the Lectron Portable Level 2 (around $249.99-$269.99), a handheld EVSE that plugs into a NEMA 14-50 and moves between apartments or cars. If your EV only accepts 7.7 kW, the WenStorm Level 2 Portable ($219.99) is a 32A plug-in alternative.
Is a 40-amp breaker needed for a 40-amp EV charger?
No, and this is the most frequent error people make when shopping for a home EV charger. The National Electrical Code's 80% continuous-load rule (Article 625.41 / 210.20(A)) lets a continuous load draw only 80% of a breaker's rating, so a 40-amp charger legally needs a 50-amp breaker (40A / 0.8 = 50A). A 40-amp breaker can support just a 32-amp continuous load, and if that matches your panel, see our best 32-amp EV charger picks. The WenStorm Level 2 Portable is a related option: it plugs into a NEMA 14-50 on that circuit but is limited to 32A.
Will 40 amps charge an EV fully overnight?
Yes, for almost any EV. Depending on the vehicle's onboard charger, a 40A/9.6kW unit adds around 25-32 miles of range hourly, which refills a 200-300 mile battery in 7-9 hours overnight. That easily handles the national average of about 37 miles driven daily, leaving room for longer days.
Is a fixed 40A charger better, or an adjustable one that can be stepped up later?
The answer turns on whether you may upgrade the panel to 60A eventually. Fixed units such as the Grizzl-E Classic are simpler and frequently cheaper, but they never exceed 40A. Adjustable models like the Emporia Classic or Lectron V-Box Pro can run at 40A now on a 50A circuit and go up to 48A once the circuit is upgraded, with no new hardware. The WenStorm Level 2 Portable is adjustable only on the way down: its 16/24/32A dial steps the output down, but it tops out at 32A and can't be turned up to 40A or 48A later.
Does a 40-amp charger plug into an outlet, or must it be hardwired?
Most 40A chargers can connect to a standard NEMA 14-50 outlet, the receptacle also used for RV hookups and electric ranges, so the charger needs no hardwiring or electrician labor and only the outlet installation is required. The Lectron V-Box Pro partly differs: it plugs in with a 40A cap, or it can be hardwired to reach its full 48A ceiling. The WenStorm Level 2 Portable is plug-in only too, with no hardwired version, and caps at 32A / 7.7 kW.
Is the WenStorm Level 2 Portable a 40-amp charger?
No. The WenStorm Level 2 Portable delivers 32A / 7.7 kW through a NEMA 14-50 outlet, with a 16/24/32A dial, a 25-foot cable, and J1772 or NACS at $219.99. It works on a 50A circuit but will not draw 40A, so it fits only if your EV's onboard charger accepts 7.7 kW or less. It has no app and no hardwired version, and its 2-year warranty is a year shorter than Emporia's.