How to charge two EVs from one outlet

Buy an automatic splitter switch — the Splitvolt NEMA 14-30/14-50 if your charger ends in a 14-50 plug, the NeoCharge Smart Splitter if both cars run smaller cords. Never a Y adapter. A splitter switch gives power to one outlet at a time on purpose; a Y adapter lets two chargers pull from one circuit simultaneously, and that is how a 30 amp circuit ends up carrying 60.

The second thing to know is the ceiling. On a dryer circuit, everything here is capped at 24 amps total — not 24 amps each. Which car gets it, and when, is the question this page is really about.

Quick picks

Ranked, with the reasoning underneath. Tap any row to jump to that write-up; tap the price to check it on Amazon. Prices come from the live layer, never from this page.

#	Product	Best for	Type	Price
1	Splitvolt Splitter Switch (NEMA 14-30 in, 14-30 + 14-50 out, 240V, 24A)The only splitter here that ends in a NEMA 14-50, so a 14-50 charger reaches a dryer circuit — at 24 amps, which you must set yourself.	A 14-50 charger on a dryer circuit	Automatic 240V splitter	$390.00 · Amazon#ad
2	NeoCharge Smart Splitter (NEMA 14-30)The four-prong equivalent: it shares a modern dryer circuit, prioritizes the dryer, and switches to the car when the laundry finishes.	A modern 4-prong dryer outlet	Automatic 240V splitter	Check price#ad
3	Lectron Portable Level 1 J1772 Charger (15A, NEMA 5-15)The unglamorous answer that covers most commutes: an ordinary 120V socket, overnight, and no conversation with anybody about electrical work.	An ordinary wall socket	Level 1 EVSE	$159.99 · Amazon#ad

#1 · A 14-50 charger on a dryer circuit

Splitvolt Splitter Switch (NEMA 14-30 in, 14-30 + 14-50 out, 240V, 24A)

The only splitter here that ends in a NEMA 14-50, so a 14-50 charger reaches a dryer circuit — at 24 amps, which you must set yourself.

Published specifications for the Splitvolt Splitter Switch (NEMA 14-30 in, 14-30 + 14-50 out, 240V, 24A), each linked to its source

Wall socket connection	NEMA 14-30 male (the modern four-prong dryer outlet)source
Outlets provided	NEMA 14-30 female (dryer) and NEMA 14-50 female (EV)source
Maximum load	240V ~ 60Hz 24A ACsource
Internal protection	Integrated 24A circuit breaker with easy resetsource
Certification	cETLus listed Intertek 5021938; conforms to UL 60730-1, certified to CSA E60730-1source
Switching	Automated power switching between the dryer and EV socketssource
Dust and water protection	Indoor use onlysource
Warranty	1 year manufacturer's limited warranty; a 4 year extension is sold separatelysource

What those numbers mean

The NEMA 14-50 output is what makes this different from every other splitter on this site. A charger that ends in a 14-50 plug physically cannot reach a dryer receptacle; this gives it a 14-50 to plug into.

What it does NOT do is raise the current. The circuit behind it is still 30 amps, the device is capped at 24, and Splitvolt states plainly that you must set your EV or adjustable charger to 24 amps maximum. A fixed 40 amp charger is the wrong partner for it.

Splitvolt publishes an actual certificate number — Intertek 5021938 — rather than the word "certified". That is a claim you can look up, which is the distinction this site keeps insisting on.

What it does well

• Publishes a checkable cETLus certificate number, not just a certification claim
• The only splitter here with a NEMA 14-50 output, so a 14-50 charger can use a dryer circuit
• Integrated 24A breaker with a reset, so the protection is inside the device
• Automatic switching — nobody has to remember to unplug the dryer

What it does not

• Expensive — it costs more than many of the chargers it feeds
• Indoor use only, per Splitvolt's own specification
• 24A ceiling, and you have to set the charger down to it yourself; the device will not do it for you
• One year of warranty as standard, which is short against the three years the charger brands publish

Skip this one if: Your charger has no current adjustment. A fixed 40 amp unit plugged into this will try to draw 40 amps from a 30 amp circuit, which is the exact situation the 24 amp setting exists to prevent.

$390.00 · View on Amazon

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#2 · A modern 4-prong dryer outlet

NeoCharge Smart Splitter (NEMA 14-30)

The four-prong equivalent: it shares a modern dryer circuit, prioritizes the dryer, and switches to the car when the laundry finishes.

Published specifications for the NeoCharge Smart Splitter (NEMA 14-30), each linked to its source

Outlet type	Plugs into an existing four-prong 220/240V NEMA 14-30 dryer outletsource
EV current limit	The EV or charger must be set to 24 amps or less when sharing with a dryersource
Switching	Auto-switching prioritizes the dryer and switches to EV charging when it finishessource
Certification	UL safety certified and NEC compliantsource
Installation	No electrician needed — plug and playsource

What those numbers mean

NEMA 14-30 is the four-prong dryer outlet standard in homes built after the mid-1990s, so which splitter you need is really a question about the age of the building.

The 24 amp ceiling is the same arithmetic as the three-prong version, for the same reason: 30 amp circuit, 80% continuous rule.

Dryer priority is the right default for a shared household. A dryer cycle is an hour; a charging session has all night to finish.

What it does well

• Works with the grounded four-prong outlet, which is the safer configuration to begin with
• UL safety certified
• Auto-switching, so nobody has to remember to unplug anything

What it does not

• Same 24A ceiling as any 30 amp circuit sharing arrangement
• Wrong device for a three-prong NEMA 10-30 outlet

Skip this one if: Your building predates the four-prong standard and the laundry outlet has three prongs. That is a NEMA 10-30 and needs the three-prong splitter instead.

Check price on Amazon

#ad · how this is funded · price as of October 27, 2026

#3 · An ordinary wall socket

Lectron Portable Level 1 J1772 Charger (15A, NEMA 5-15)

The unglamorous answer that covers most commutes: an ordinary 120V socket, overnight, and no conversation with anybody about electrical work.

Published specifications for the Lectron Portable Level 1 J1772 Charger (15A, NEMA 5-15), each linked to its source

Input	120V, 15A maximumsource
Output power	1.8 kWsource
Cable length	16 ftsource
Plug / connector	NEMA 5-15 plug, J1772 connectorsource
Certification	UL 2594 / UL 2231 certified, and separately described as ETL-certified; no certificate number publishedsource
Ingress rating	IP65 weather-resistant, stated in the specification textsource
Manufacturer charge-rate claim	45+ miles of range overnight; 3-5 miles of range per hoursource

What those numbers mean

1.8 kW sounds trivial next to 9.6 kW, and for a road trip it is. For a commute it usually is not: the average US driver covers well under 45 miles a day, and this replaces that overnight while the car sits anyway.

The honest ceiling is the circuit behind the socket, not the cable. This unit draws 15 amps for hours, which a 20 amp circuit supports continuously and a 15 amp circuit does not — so check the breaker before the first overnight session, and on a 15 amp circuit choose a 12 amp unit instead.

This is the only category of EV charging that is genuinely invisible to a landlord. It draws less than a hair dryer and plugs into a receptacle that already exists.

What it does well

• Works with a socket that already exists, everywhere, with no permission needed
• UL 2594 and UL 2231 certified rather than a generic cordset
• Cheapest possible entry into home charging, by a wide margin

What it does not

• 1.8 kW will not recover a long driving day overnight
• 16 ft cable, and the nearest 120V socket is often not the nearest thing to the car
• Its 15 amp draw needs a 20 amp circuit behind the socket; an ordinary 15 amp circuit supports 12 amps continuously

Skip this one if: You regularly drive more than about 45 miles a day. Level 1 will fall a little further behind every night and you will spend the difference at public chargers.

$159.99 · View on Amazon

$179.99 · 11% off

#ad · how this is funded · price as of October 27, 2026

Passive Y splitters are sold widely and cheaply — a NEMA 14-50 plug branching into two 14-50 receptacles, ETL listed, often under fifty dollars. They are real products with a legitimate use: RV and camper setups where the two loads are small and intermittent. We are not linking one, because for two EVs it is the wrong device and the reason is not subtle.

A splitter switch solves it by never energizing both outlets at once. That is the entire product, and it is why one costs several times what a Y adapter does.

Two things in that table decide most purchases. The first is the Splitvolt's NEMA 14-50 output — it is the only device here that gives a 14-50 charger somewhere to plug in on a dryer circuit, which is otherwise a physical dead end. The second is that NeoCharge publishes genuine simultaneous charging on its larger model, with each car held at 20 amps or less. Splitvolt's device switches between sockets instead.

If the outlet is a dryer receptacle, the circuit behind it is 30 amps, and the continuous-load rule caps you at 24. Splitvolt states it plainly: you "must adjust your EV or adjustable charger to 24 amps max output." The splitter will not do this for you. It is a setting on your charger, and it is on you.

This is why a fixed 40 amp charger is the wrong partner for any of this. It has no setting to come down to 24, so it will attempt 40 on a 30 amp circuit. Working out the amp rating you need does this for your own outlet, and the Lectron 40A review is an example of a unit that is excellent on a 14-50 and wrong here.

Before spending four hundred dollars on a splitter switch, price the obvious alternative: give the second car a Level 1 cord on an ordinary 120V socket. That is the third pick above, and for a lot of households it is simply the better purchase.

Forty miles a night covers the second car in a majority of two-car households, and it does it for the price of a cord rather than a cord plus a splitter. If that is your situation, the Level 1 roundup is the whole purchase.

1. 1Can a tenant install it unaided? Every device here plugs in. Nothing is hardwired, nothing needs a permit, and all of it leaves when the lease does.
2. 2Does it prevent simultaneous draw, or merely allow it? This is the criterion that eliminates the entire passive-splitter category, cheap and available though it is.
3. 3Is the certification checkable? Splitvolt publishes an Intertek certificate number. NeoCharge publishes "cUL Listed" without a number. Both are better than the unlisted devices in this category; only one can be looked up.
4. 4Does it match the plug your charger already has? The 14-50 output is the Splitvolt's real argument, and the reason it ranks first despite costing more.
5. 5What happens at the ceiling? Whether the device limits current itself, or expects you to set the charger. All of these expect you to set the charger.
6. 6Is there a cheaper way to the same outcome? Asked on every page here, and on this one the answer is often yes — which is why a $160 Level 1 cord is ranked third rather than omitted.

Neither splitter has been through our hands; the methodology is explicit that nothing on this site has. Every figure above is from Splitvolt's and NeoCharge's own product pages. What neither company publishes is how the switching behaves over years of daily cycling, or what happens when the device itself fails with two cars depending on it — and a one-year standard warranty on both is the only durability signal either one offers.