Charging an EV from a dryer outlet

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If your panel is full, or a new circuit means trenching to a detached garage, the 240-volt outlet behind the dryer starts to look attractive. It is a legitimate route, and there is listed equipment made for exactly this. What it is not is a way to get 40 amps.

The arithmetic of a 30-amp circuit

Twenty-four amps is roughly 20 miles of range an hour. Against a 40 A circuit's 30 to 35, that sounds like a real loss, and during the day it is. Overnight it rarely matters, because the car is parked for ten hours and almost nobody arrives home empty.

Know which outlet you have

The older 10-30 has three prongs and no separate ground; the 14-30 has four. They are not interchangeable, and no adapter turns one safely into the other. The 14-50 outlet and the 6-50 cover the 50-amp pair.

Never a plain splitter

The listed products do two things a Y-adapter cannot: they make sure only one load runs at a time, and they hold the EV side to the circuit's continuous limit with an internal breaker. Both of the units below publish a third-party listing.

Automatic switching

The NeoCharge Smart Splitter plugs into the existing outlet and switches power between the dryer and the car automatically, with an internal software breaker enforcing the limit. It is UL listed and is sold in versions for the 10-30 and 14-30 at 24 A, and for the 14-50, 10-50 and 6-50 at 40 A. Full review.

Manual switching, on an older outlet

The Splitvolt Splitter Switch is the answer for a three-prong 10-30: 24 A at 240 V, an internal safety breaker, and a cETLus listing with the Intertek file number published. Note that this model's EV socket is itself a 10-30 -- Splitvolt sells a separate version with a 14-50 EV outlet.

Your charger has to cooperate

A charger plugged into a 30-amp circuit must be set to draw no more than 24 A. Most Level 2 units are adjustable: the Grizzl-E Classic sets 16, 24, 32 or 40 A with physical switches, and app-based chargers set it in software. A portable unit with a 14-30 plug is the other common route -- dual-voltage portables covers those.

Setting the charger low is not optional and it is not a suggestion. The splitter's internal breaker is a backstop, not the plan.

When a dedicated circuit wins

• You want more than 24 A. No splitter changes the circuit it plugs into.
• The laundry is nowhere near the car. A long cord run is not the answer. Where to mount.
• You do laundry at night. The car and the dryer take turns, so a late wash delays the charge.
• Your panel has room anyway. A dedicated circuit is simpler, faster and has one less device in the chain. Does a charger need its own circuit.

The splitter route earns its place when a new circuit would mean a panel upgrade. That is a four-figure job in most homes, and avoiding it is worth losing some charging speed. Panel upgrades has the numbers.

Listed devices for a dryer circuit

Both publish a third-party listing and hold the EV side to the circuit's continuous limit.

1. The broadest outlet range

N40A

NeoCharge Smart Splitter

NeoCharge · NEMA 14-50 · 40 A / 9.6 kW

Plugs into an existing 240-volt outlet and switches power between your dryer and your EV automatically, so you get Level 2 charging without a new circuit. UL listed, and sold in a version for each common dryer and range outlet.

What is good

• +Avoids a new circuit, which can mean avoiding a panel upgrade
• +Switches between the two loads automatically
• +UL listed, with an internal breaker that enforces the circuit limit
• +A version for every common dryer and range outlet type

What is not

• −The dryer and the charger take turns on the circuit
• −On a 30 A dryer circuit you are limited to 24 A of charging
• −You must buy the version that matches your outlet exactly

Published specifications for the NeoCharge Smart Splitter

Output (14-50 version)	40 A / 9.6 kW
Input (14-50 version)	NEMA 14-50P, 240 VAC single phase
Outputs (14-50 version)	2 x NEMA 14-50R
Also sold for	NEMA 10-30 and 14-30 (24 A), NEMA 10-50 and 6-50 (40 A)
Protection	Internal software breaker
Weight	2.5 lb
Certification	UL listed

Skip this if: Skip it if your panel can take a new circuit. A dedicated EV circuit is simpler, charges while the dryer runs, and has one less device in the chain.

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

2. Older 10-30 dryer outlets

Splitvolt Splitter Switch (NEMA 10-30)

Splitvolt · NEMA 10-30 · 24 A / 5.8 kW

Shares an older three-prong 30-amp dryer outlet between the dryer and the charger, with an internal breaker holding charging to 24 A. This model's EV socket is also a NEMA 10-30; Splitvolt sells a separate version with a 14-50 EV outlet. cETLus listed with a published file number.

What is good

• +cETLus listed, with the Intertek file number published
• +Integrated 24 A breaker keeps charging inside the limit of a 30 A circuit
• +Switches between dryer and EV automatically -- no plug swapping
• +Full-color display reports real-time kWh, amps and volts
• +Plugs in -- the splitter itself needs no electrician installation

What is not

• −Your charger must be able to limit itself to 24 A
• −The EV socket is a NEMA 10-30, so a charger with a 14-50 plug needs a different model
• −24 A is about 20 miles of range per hour -- slow for a big battery
• −Indoor use only, and a 1-year warranty against the 3 years most chargers carry

Published specifications for the Splitvolt Splitter Switch (NEMA 10-30)

Rating	240 V ~ 60 Hz, 24 A AC maximum load
Wall plug	NEMA 10-30 male, on a 4 ft pigtail
Dryer socket	NEMA 10-30 female
EV socket	NEMA 10-30 female
Switching	Automated between the dryer and EV sockets
Display	Full-color screen: real-time kWh, amps, volts and status
Protection	Integrated 24 A circuit breaker with easy reset
Manual override	Optional manual power-off switch
Circuit	Standard 30 A dryer circuits; 24 A max for the NEC safe charging rate
Mounting	Integrated wall-mount screw holes
Use	Indoor use only
Size and weight	12 x 8.5 x 4 in, 6.7 lb
Certification	cETLus, Intertek 5021938, UL 60730-1 / CSA E60730-1
Warranty	1 year limited
SKU	SPS-C1-011-30A

Skip this if: Skip it if your dryer outlet is a four-prong 14-30 or a 14-50 -- buy the splitter version made for that outlet instead.

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

$390.00 · View on Amazon#ad how we are funded · price as of November 8, 2026