Splitvolt Splitter Switch Review: A Real Shortcut?

It shares your dryer outlet with the car, and it caps you at 24 amps to do it safely.

Specifications

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

What it does well

• It solves the specific problem of a house or flat where a new circuit is not going to happen, which is the situation a great many prospective EV owners are actually in.
• The internal safety breaker enforces the 24 amp continuous limit rather than trusting you to set it correctly, which is the right way round.
• cETLus certification means it has been tested by a Nationally Recognized Testing Laboratory rather than simply asserted to be safe.
• A real time power display, which makes it obvious what is actually flowing rather than what you assumed.

Where it falls short

• Twenty four amps is the ceiling, which is roughly 5.8 kW, or about half what a 48 amp install delivers. Overnight that is usually enough; for a big daily commute it may not be.
• Your charger or car must be able to limit itself to 24 amps. Splitvolt says so explicitly and it is the thing to confirm before buying, not after.
• At around three hundred and eighty dollars it costs a substantial share of what a simple dedicated circuit might cost in an easy installation, so get a quote before assuming this is the cheap option.
• Sharing a laundry circuit means the dryer and the car cannot both run at full tilt, which is fine at 2am and irritating on a Saturday afternoon.

What owners report

Published owner reports are positive from the group it is aimed at: renters, flat dwellers and people whose panel is genuinely full. They describe it as the thing that made an EV possible at all, and 24 amps overnight covers ordinary commuting comfortably.

The recurring caution in reports is about charger compatibility. Several describe having to reduce the vehicle or charger current limit before the setup would work correctly. That is exactly what Splitvolt's own before you buy note says, and it is the single most important thing to check first.

Who it suits

• Renters and flat dwellers who cannot alter the electrical installation.
• Homes with a genuinely full panel where a new circuit means an upgrade.
• Daily commutes short enough that 24 amps overnight is comfortably sufficient.

Who should skip it

• Anyone who can get a dedicated circuit installed at a reasonable price.
• High mileage drivers who need a deep overnight fill.
• Owners whose charger or car cannot be limited to 24 amps.

Alternatives worth considering

Keep reading

• Dryer splitter vs dedicated circuit
• Apartment and condo charging
• Charge time calculator
• Grizzl-E Smart review
• Tesla Mobile Connector 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

Is sharing a dryer outlet with an EV charger safe?

It is when the sharing device is certified and enforces the current limit, which this one does with an internal breaker and a cETLus listing. What is not safe is an uncertified splitter or a homemade adapter, because a 30 amp circuit carrying two loads at once is exactly how a wire overheats behind a wall.

Why only 24 amps?

Because EV charging is a continuous load and the code limits continuous draw to 80 percent of the circuit rating. On a 30 amp dryer circuit that is 24 amps. The splitter enforces it rather than leaving it to you, which is the correct design choice.

How much range does 24 amps add overnight?

At 240 volts, 24 amps is about 5.8 kW, so eight hours adds roughly 46 kWh before losses, which is well over a hundred miles in most EVs. For the great majority of daily driving that is more than enough. Our charge time calculator will give the figure for your specific car.

Do I need an electrician to install it?

Splitvolt describes it as plug and play with no electrical installation required, since it plugs into the existing dryer outlet. That said, if your dryer outlet is old, damaged or of uncertain wiring, having an electrician look at it first is sensible. A receptacle that has been carrying a dryer for thirty years deserves an inspection.

Splitter or a dedicated circuit?

A dedicated circuit is better in every technical sense: more current, no sharing, no compromise. The splitter wins only when a circuit is impossible or the quote is high. Get a quote first. Our dryer splitter versus dedicated circuit comparison sets out the full trade-off.

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.