JuiceBox 40 Review: Smart Charging Done Right (With One Big Caveat)

The JuiceBox 40 by Enel X, later rebranded Enel X Way, has been one of the more popular smart chargers for years. It delivers a fixed 40A (9.6 kW) at 240V, runs one of the more polished charger apps on the market, and typically lists around $589 to $649. But the parent company's ownership turmoil has turned "is it still supported" into the first question any buyer should ask before purchasing.

Key Specifications

At 9.6 kW, a JuiceBox 40 adds roughly 25 to 30 miles of range per hour of charging on a typical midsize EV, enough to fully replenish most daily commutes overnight even starting from a near-empty battery.

What Makes It Good

Genuinely useful smart features

The JuiceNet app provides scheduling, live energy monitoring, Amazon Alexa and Google Assistant integration, and in some utility territories, participation in demand response programs that pay you to shift charging off peak. The scheduling interface, with drag-to-set time blocks, is more intuitive than most competing apps.

Compact design and cable reach

The JuiceBox 40 is noticeably smaller than the ChargePoint Home Flex or the Grizzl-E, which matters on a garage wall that's already crowded with a workbench or storage. The 25 ft cable is 2 ft longer than the Home Flex's 23 ft, giving you a bit more reach to a second parking spot.

Plug-in and hardwired options

Available as NEMA 14-50 plug-in or hardwired. The plug-in version is popular with renters, since it unplugs from the outlet and moves with you, leaving only the NEMA 14-50 receptacle behind (itself a resale point for the next tenant with an EV).

The Big Caveat: Company Stability

Enel X Way, the company behind JuiceBox, exited the North American home-charging business in 2023, discontinuing new JuiceBox sales and winding down consumer support. Existing units have continued to function for basic charging, and JuiceNet cloud service has remained intermittently available, but new firmware updates and warranty service are no longer guaranteed the way they were when the product line was active. Retailer stock is now largely limited to leftover inventory rather than fresh production.

Should You Still Buy One New?

If you find a JuiceBox 40 heavily discounted, and you're comfortable losing app features eventually, the hardware itself, a straightforward 40A/9.6 kW Level 2 charger, is still competent. But for most buyers shopping in 2026, spending close to full price on a discontinued product line doesn't make sense when actively supported alternatives exist at similar or lower prices.

How It Compares

vs ChargePoint Home Flex: ChargePoint offers adjustable amperage (16-50A versus JuiceBox's fixed 40A), an actively developed app, and a company that isn't exiting the category. It costs $50 to $100 more, but for a purchase you expect to keep for 8 to 10 years, ongoing support is worth the premium.

vs Grizzl-E Classic: The Grizzl-E Classic is roughly $200 cheaper and has no app to begin with, so there's no smart-feature risk to worry about. If you never wanted scheduling or monitoring, the Grizzl-E was always the simpler buy, and now it's also the more future-proof one.

vs Tesla Wall Connector: The JuiceBox works with any EV via J1772; the Tesla Wall Connector is built around Tesla's connector (NACS in newer versions). JuiceBox's app ecosystem is more feature-rich when it works, but Tesla's connector has the advantage of a manufacturer still actively selling and supporting the product.

If You Already Own One: Support Options

Owners who bought a JuiceBox 40 before the North American exit still have a few paths available, and it's worth working through them in order rather than assuming the charger needs replacing.

• Check JuiceNet app status first. Scheduling and monitoring have continued to work intermittently for many owners; a login failure doesn't necessarily mean the service has ended for good.
• Firmware is frozen but functional. Without new updates, the unit keeps running on its last stable firmware, which is fine for basic Level 2 charging indefinitely.
• Warranty claims go through the original retailer or a third-party electrician rather than manufacturer support in many cases, since consumer-facing support lines have been scaled back.
• Treat it as a non-smart charger going forward. If the app becomes unreliable, disable auto-connect and use the unit exactly like a "dumb" 40A charger: plug in and it charges immediately at 40A, no scheduling required.

Charging Speed Math

At a fixed 9.6 kW, the JuiceBox 40 delivers a predictable, if inflexible, charging rate regardless of your vehicle, as long as the car's onboard charger can accept at least that much (most modern EVs can).

Because the amperage can't be adjusted, an overnight 8-hour charging window comfortably covers even a mostly depleted 60 kWh battery, which is why the fixed 40A limitation rarely matters in practice for single-EV households with typical daily driving.

Installation Notes

Whichever charger you land on, the JuiceBox 40's 50A minimum breaker requirement is a real constraint on older homes with 100A main panels already carrying a range, dryer, and central air. Have a licensed electrician confirm your panel has spare capacity before committing, since work on the panel or breaker must meet local code and NEC requirements, and most jurisdictions require a permit plus inspection before the circuit goes live.

Estimate what a 40A/9.6 kW charger would cost to run at your local electricity rate with our Charging Cost Calculator, or compare the JuiceBox against currently supported alternatives with our Home Charger Comparison tool.