Grizzl-E Classic vs Ultimate 48A

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The verdict: for most houses, buy the Classic. It is the cheaper box, it goes on the smaller circuit, it plugs in rather than being wired in, and the 40 amps it delivers fills any normal car overnight with hours to spare. Step up to the Ultimate 48 for three specific reasons and no others: you want a NACS connector, you want app scheduling and OCPP, or you genuinely need the extra speed because the car is large and the nights are short. If none of those is true you are paying more for the box and more for the install to charge a car that is asleep either way.

Side by side

What eight amps is actually worth

Five miles an hour is the honest size of the speed difference on a mainstream EV. It matters if you drive a large truck, if the car is only home for six hours, or if two cars share the charger. It does not matter if the car sits in the garage from six at night until seven in the morning, which is the normal case. 32A vs 40A vs 48A covers the tier decision in general, and how long to charge at home lets you run your own numbers.

The difference that costs real money

The Classic plugs into a NEMA 14-50. The Ultimate 48 is hardwire-only -- United Chargers publishes no plug-in version at this amperage. That is normally framed as a convenience question, and in 2026 it became a cost question as well.

Under the 2026 National Electrical Code, section 625.43 was reorganized and the old thresholds were removed: all permanently connected EV supply equipment now needs a disconnecting means in a readily accessible location. For cord- and plug-connected equipment, the attachment plug is permitted to serve as that disconnecting means up to 60 amperes. So a hardwired Ultimate may need a device, an enclosure and the labor to fit it, while a plugged-in Classic brings its own disconnect in the form of the plug.

The plug cuts the other way too, in the Classic's favor: a plugged-in charger comes off the wall and moves house with you, and it can be swapped without an electrician if it ever fails. The counter-argument for hardwiring is real as well -- one fewer connection to heat up, and no dependence on the quality of a receptacle. Hardwired vs plug-in argues both sides properly, and best NEMA 14-50 outlet covers the receptacle that decides whether the plug-in route is safe.

The connector, which may decide it for you

The Classic is SAE J1772 only. The Ultimate 48 is sold in J1772 or NACS, chosen at purchase. For a J1772 car today that is no difference at all. For a household whose next car has a native NACS port -- and that list is growing -- it is the whole decision, because ordering the NACS version removes an adapter from your daily routine permanently.

Cars already arriving with a native NACS inlet include the BMW iX3, the Volvo EX60 and 2027 Chevrolet and GMC models, which GM's adapter range covers. If you expect one of those in the next few years and you are hardwiring anyway, the Ultimate's connector choice is worth more than its eight extra amps. Best NACS EV charger ranks the category.

App against no app

This is a preference rather than a specification, and the two units sit at opposite ends of it deliberately. The Classic has no app, no account and no firmware; its amperage is set with physical switches, which means nothing about it can be changed, broken or discontinued by a software update. The Ultimate adds Wi-Fi on 2.4 GHz, the Grizzl-E Connect app and OCPP.

OCPP is the part worth understanding, because it is not marketing. It means the charger is not locked to one company's cloud, which is a genuine consideration on a site that has watched a charger brand switch its servers off -- see what happened to JuiceBox owners. Against that, the thing most people want an app for is scheduling, and every car on sale can schedule its own charging. Do you need a smart EV charger argues both sides, and best EV charger without an app is the deliberate opposite case.

What about the Classic Connect?

Fair question, because it sits between these two: the Classic Connect is the 40-amp Classic with Wi-Fi and the Grizzl-E Connect app added, still on a NEMA 14-50 plug, and it is also sold in J1772 or NACS. If what pulls you toward the Ultimate is the app and the connector choice rather than the amperage, the Classic Connect gets you both on the cheaper circuit and keeps the plug. Grizzl-E Classic vs Classic Connect is that comparison in full.

And if you are looking at the Ultimate because you want the fastest thing United Chargers makes, the 80-amp Ultimate exists and is a different conversation entirely -- it wants a 100-amp circuit most houses cannot spare. Grizzl-E Ultimate 48A vs 80A settles that one.

Cold, cable and the box itself

On build quality these two are close enough that it should not decide anything. Both are aluminum, both are rated for outdoor use -- the Classic as NEMA 4 / IP67, the Ultimate as UL Type 4 -- and both carry a 3-year warranty, with a 5-year option on the Ultimate. Cable length is nearly identical: 25 ft on the Ultimate, 24 ft on the Classic's Extreme Edition. Note which Classic that is, because the long cold-flexible cable is the Extreme Edition's, not every Classic's. Best long-cable EV chargers lists the whole field if reach is your constraint.

Cold is the one place the published data actually separates them, and only because of what is missing. United Chargers rates the Ultimate 48 from -30 C to +50 C (-22 F to 122 F). It publishes no equivalent range for the Classic. That is an absence of data, not evidence the Classic is worse -- the Extreme Edition is sold specifically on cold-weather cable flexibility -- but if you are buying for a Minnesota driveway, the Ultimate is the one with a number you can hold the maker to. Best cold weather EV chargers covers what to look for.

What neither of them does

• Neither manages a shared circuit. If you want two cars on one breaker, neither of these is the answer -- that needs power-sharing hardware. Best EV charger for two EVs covers the options.
• Neither is ENERGY STAR listed as far as we can find. United Chargers publishes no ENERGY STAR certification for the Ultimate 48, which matters only where a utility rebate requires it. Check your utility's list before you buy either one.
• Neither lets you change connector later. The Ultimate's J1772-or-NACS choice is made at purchase. The Classic is J1772 for life. An adapter is the fallback in both cases.
• Neither does the paperwork for you. The federal 30C credit and utility rebates are your own filing either way. EV charger tax credit and rebates explains what to keep.

Which to buy

Both units, with live prices

The Classic first, because it is the right answer for more houses. Live Amazon prices with the date they were read.

1. 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

Published specifications for the Grizzl-E Classic

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.

$299.99 · View on Amazon#ad how we are funded · price as of November 8, 2026

2. Ultimate build quality on a 60 A circuit

Grizzl-E Ultimate 48A

United Chargers · J1772 + NACS · 48 A / 11.5 kW · 25 ft cable

The Ultimate's hardware at the amperage most houses can feed: 48 A and 11.5 kW, hardwired, Wi-Fi and OCPP, in the same cast-aluminum Type 4 case. The catch is what United Chargers publishes about dialing it down -- the adjustable steps stop at 40 A.

What is good

• +48 A on a 60 A circuit, which a normal 200 A panel can usually spare
• +Same cast-aluminum UL Type 4 case and -22 F rating as the 80 A Ultimate
• +25 ft cable, the long end of the range
• +Wi-Fi, a mobile app and OCPP, so it is not locked to one vendor's cloud
• +Offered with either a J1772 or a NACS connector

What is not

• −Hardwire only -- there is no plug-in version of the Ultimate
• −United Chargers publishes adjustable steps of 40/32/24/16 A, so the published step list does not include 48 A itself
• −No ENERGY STAR certification listed, unlike the 80 A Ultimate
• −A J1772 unit needs an adapter on every charge if you drive a NACS car
• −Costs more than the 40 A Grizzl-E Classic for speed many owners will not use

Published specifications for the Grizzl-E Ultimate 48A

Maximum output	48 A / 11.5 kW
Adjustable current	40 A, 32 A, 24 A, 16 A (as published)
Connector	J1772 or NACS, chosen at purchase
Cable	25 ft (7.6 m)
Installation	Hardwire only
Enclosure	Aluminum, UL Type 4 indoor/outdoor rating
Operating temperature	-30 C to +50 C (-22 F to 122 F)
Connectivity	Wi-Fi (2.4 GHz), mobile app, OCPP
Certification	UL, file E510712
Weight	11.00 kg / 24.25 lb, shipped
Enclosure size	10.25 x 6.25 x 3.75 in
Country of origin	Canada, per United Chargers
Model number	GRS-077-W-HW-25N48-A-GB
Warranty	3 years, or 5 years

Skip this if: Skip it if your car accepts more than 11.5 kW and your panel can carry a 100 A circuit -- that is what the 80 A model is for. Skip it too if you want a plug-in unit; this is hardwire only.

Specifications above are the manufacturer’s published figures. Source: United Chargers. We have not tested this unit — see how we pick.

$349.99 · View on Amazon#ad how we are funded · price as of November 8, 2026