Grizzl-E Duo Connect Review: Two Cars, One Circuit

Two 25 foot cables from one 40 amp plug, and the arithmetic that follows from that.

Specifications

Specifications above come from Grizzl-E's published specifications. Treat pricing as approximate, since Amazon pricing moves.

<!-- gift-guides-xlink -->

What it does well

• One outlet, one install, two cars. Compared with a second dedicated circuit this saves both the electrician's time and a panel space you may not have.
• Two 25 foot cables reach both sides of most garages and driveways without moving a car.
• The Grizzl-E metal enclosure and cold weather cable, which are the reason the brand has the reputation it does.
• Scheduling through Grizzl-E Connect lets both cars sit on off peak rates without anyone getting up at midnight.

Where it falls short

• Forty amps is the total, not the amount per car. Two cars charging at once share it, so each gets roughly half, and the honest way to think about this product is as a 4.8 kW per car charger when both are plugged in.
• It is a plug-in unit on a NEMA 14-50, which caps it at 40 amps under the receptacle rule and rules out a 48 amp configuration entirely.
• At around nine hundred dollars it costs more than two decent single chargers, so the saving is in the installation rather than the hardware.
• If one car is a long distance commuter and the other is a runabout, the shared budget will annoy you and two separate circuits is the better plan.

What owners report

Published owner reports are positive about build and about the practical convenience of not having to swap a cable between cars in the dark. The recurring theme in the criticism is the shared amperage, which owners describe as fine for two ordinary commutes and frustrating when both cars need a deep overnight fill.

The second consistent note is about scheduling. Owners describe the ability to stagger the two cars in the app as the feature that makes the shared budget workable, because sequential charging at the full 40 amps beats simultaneous charging at 20 each for most household patterns.

Who it suits

• Two EV households where both cars do ordinary daily mileage.
• Anyone whose panel has no space for a second dedicated circuit.
• Households already on an existing NEMA 14-50 outlet.

Who should skip it

• Households where both cars regularly arrive nearly empty and must be full by morning.
• Anyone who wants 48 amps, since a plug-in unit cannot deliver it.
• Single car households, who are paying for a second cable they will not use.

Alternatives worth considering

Keep reading

• Hardwired vs plug-in
• Charge time calculator
• Load management devices
• Grizzl-E Classic review
• Emporia Pro review
• NEMA plug types chart

This review draws on published specifications, manufacturer figures and the consensus of verified owner reviews. We have not tested this product ourselves, and we say so rather than implying otherwise. As an Amazon Associate we earn from qualifying purchases.

Common questions

Does the Grizzl-E Duo give 40 amps to each car?

No. Forty amps is the total for the unit, so when both cars are plugged in the current is shared between them. Two cars drawing at once will each see roughly half, or about 4.8 kW. Our charge time calculator makes it obvious what that means for your specific overnight window.

Is a dual charger cheaper than two chargers?

The hardware usually is not, but the installation usually is. One 50 amp circuit, one outlet and one electrician visit against two of each. When panel capacity or panel spaces are the limit, the dual unit can be the only practical option.

What outlet does it need?

A NEMA 14-50 on a 50 amp circuit, which is the same receptacle used for an electric range or a dryer style connection. Our NEMA 14-50 outlet installation guide covers what a compliant install looks like, and any receptacle feeding an EV charger has GFCI requirements a licensed electrician will handle.

Can it be hardwired for 48 amps?

No. It is supplied as a plug-in unit on a NEMA 14-50, and under the receptacle rules that caps continuous output at 40 amps. If 48 amps matters to you, this is not the product, and our hardwired versus plug-in comparison explains where that line falls.

Can I stagger the two cars rather than sharing?

Yes, and most owners do. The Grizzl-E Connect app schedules each cable, so one car charges at the full rate then the other starts. For two ordinary daily commutes that is comfortably enough time overnight, and it uses the circuit far more efficiently than simultaneous charging.

Getting your own panel and load numbers ready for an electrician? The EV Home Charging Install Planner is the paid version of these pages: 8 printable worksheets you fill in with your own numbers, plus the full PDF, $29.