We specialize in installing EV chargers, primarily with hardwired connections. Yet, we recognize that sometimes there’s a need to utilize an existing socket, like a dryer outlet, in your garage. For your convenience and safety, we’ve compiled a comprehensive overview and comparison of splitters.
If you’re looking to charge two cars simultaneously, check out our double-charging guide.
One of the challenges EV owners face is finding a convenient and cost-effective way to charge their vehicles at home. This is where using a dryer outlet splitter comes into play. The question then becomes, which splitter to choose for Level 2 EV charging – a dumb or smart one?
There are several reasons why an EV owner might choose to use a dryer plug splitter for charging.
Dumb splitters are devices that allow two separate devices to draw power from a single power source. They typically comply with NEMA standards of 10-30 (3-Prong dryer), 14-30 (4-Prong dryer), 10-50 and 14-50. A distinctive disadvantage of such splitters is their inability to adjust the power and direction of the current. In the context of EV charging, a dumb splitter can be used to share a power source, such as a 220/240v dryer plug, between the dryer and the EV charger. This can be particularly useful in situations where installing a hardwired EV charging station is not feasible or cost-effective.
While using a dumb splitter for EV charging can be a convenient and cost-effective solution, it is not without risks. The primary risk is the potential for overloading the circuit if the dryer and the EV charger are used simultaneously. This can be mitigated by setting a reminder to avoid using the dryer while the EV is charging.
Additionally, it is always recommended to have a certified electrician check the setup if there are any uncertainties. This can help ensure that the setup is safe and meets all electrical codes and standards.
While Y adapters for the dryer plug can be a good solution for some, there are also smart alternatives available that offer additional features and benefits.
For example, smart dryer outlet splitters for Tesla can automatically manage the power distribution between the dryer and the Tesla Mobile Connector to prevent overloading the circuit.
The primary reason to use a smart splitter is its ability to allow multiple devices to share a single charging outlet. This means you can charge your EV and run your dryer simultaneously without overloading the circuit or tripping the breaker. Got multiple EVs at home and just a few charging outlets? This gem’s a lifesaver for you!
| Safety Certification |
Smart dryer splitters come packed with features designed to make EV charging a breeze. Here are some notable ones:
| Priority Setting |
240v dryer outlet splitters offer different charging options for EVs.
| Dumb Y-Adapter | Smart Splitter | |
|---|---|---|
Pros | ||
| Cost | More affordable due to simplicity. | Typically pricier due to advanced features. |
| Weather Resistance | Suitable for outdoor use. | Generally designed for indoor use only. |
| Safety | Risk of circuit overload if not managed properly. | Built-in power management to prevent circuit overload. |
| Certification | Not always UL listed. | Often UL listed, indicating safety inspections. |
Cons | ||
| Risk of Overloading | High risk if dryer and EV charger are used simultaneously. | Low risk due to automatic power management. |
| Indoor/Outdoor Use | Suitable for both indoor and outdoor use. | Primarily designed for indoor use due to lack of waterproofing. |
| Relative Cost | Less expensive, but lacks advanced safety features. | More expensive, but offers enhanced safety and convenience. |
Dumb NEMA switchers are cheaper but require careful management outdoors to avoid circuit overload. Smart Splitters are safer, with built-in power management, but they cost more and are designed for indoor use only. The price of some dual chargers is comparable to a couple of smart switches.
Before investing in a smart dryer cord splitter, there are a few things you should know:
If a splitter is not per the UL standard, insurance might complain if there’s a fire or electrical damage.
To determine the appropriate dryer splitter for EVs, inspect your 240v outlet.
If you haven’t yet purchased an adapter for your Tesla, choose one that matches your outlet’s connector type.
The power and charging speeds you can expect will vary depending on the type of NEMA outlet you have.
| NEMA type | Max output Amps & kW | TMC Adapter | Model 3 Charge speed |
|---|---|---|---|
| NEMA 6-50 | 240 volt / 50 amp breaker, Maximum 32 amp / 7.7kW output | Link | 30 MPH |
| NEMA 14-50 | 240 volt / 50 amp breaker, Maximum 32 amp / 7.7kW output | Link | 30 MPH |
| NEMA 14-30 | 240 volt / 30 amp breaker, Maximum 24 amp / 5.8kW output | Link | 22 MPH |
| NEMA 10-30 | 240 volt / 30 amp breaker, Maximum 24 amp / 5.8kW output | Link | 22 MPH |
| NEMA 6-20 | 240 volt / 20 amp breaker, Maximum 16 amp / 3.8kW output | Link | 15 MPH |
| NEMA 6-15 | 240 volt / 15 amp breaker, Maximum 12 amp / 2.9kW output | Link | 11MPH |
For example, a NEMA 10-30 splitter allows a 24 amp load, which would require a 30 amp breaker. Another more popular NEMA 14-30 splitter differs only in design, and has similar power limits.
If you have a TMC-adapter with a 14-50 connector and your dryer socket is a 10-30, consider using a splitter with different NEMA connectors (10-30 + 14-50) before purchasing an additional 10-30 TMC-adapter. Always ensure that the vehicle’s incoming voltage doesn’t surpass the 10-30 outlet’s maximum limit of 24 Amps.
Below, you’ll find a series of reviews from EV Adept. Through rigorous testing, we’ve identified certain models that stand out from the rest. Our selection was influenced by their popularity among our customers. Furthermore, we placed a heightened emphasis on specific criteria, such as the device’s ability to revert to the priority setting after a power shutdown and its capability to recover correctly once power is restored following an outage.
In our experience as EV installers, we’ve noticed that the Splitvolt splitter switch has garnered significant appreciation from customers.
From our extensive experience as EV installers, we’ve come across various feedback regarding the Splitvolt splitter switch. One piece of feedback that we’ve encountered was related to a low-volume chatter sound the switch produces during its auto-switch operation. Not sure if it’s a lone wolf situation or a pack problem.
Moreover, not every EV owner might find the Splitvolt splitter switch indispensable. If an owner has the necessary electrical capacity and can afford to establish a dedicated, high-powered 240-volt circuit for an EV charger, that’s often the most optimal solution. Nonetheless, for those seeking a more economical and time-efficient approach, the Splitvolt splitter switch can serve as a viable alternative.
Our hands-on experience and feedback from clients have revealed several benefits of the Splitvolt splitter switch:
It’s worth highlighting that while these benefits are derived from widely available data, personal experiences can differ. We always advise potential buyers to delve into user feedback and seek expert opinions before settling on a purchase.
The Splitvolt splitter switch epitomizes a Level 2 electric vehicle rapid home charging solution, projected to be safe, budget-friendly, and straightforward. Here are its technical details:
Additionally, Splitvolt has introduced another model – the Split Volt Splitter Switch NEMA 10-30 / 14-50, which shares some similarities but also some distinct specs.
To sum up, the Splitvolt splitter switch is carved out to be a straightforward, wallet-friendly solution for home EV charging.
Diving into our data and hands-on playtime, we’re usually giving Splitvolt two thumbs up for our clients. Business-wise, it’s a solid choice.
The NeoCharge smartly shifts the secondary outlet to a standby mode when the primary one is active. This feature ensures devices like the JuiceBox maintain their Wi-Fi connection, even if another device, such as a dryer, is in operation.
Based on our years of experience as EV installers and feedback from our clients, here’s an objective look at the NeoCharge Smart Splitter:
Most of our clients are raving about its top-notch performance and how easy it is to use.
Before installation, if you intend to use the NeoCharge app, note down the serial number found on the back of the product. It saves the trouble of having to disassemble the device later for app registration.
The device also possesses intelligent power splitting functionality, determining which outlet gets power and the amount of power to distribute, guaranteeing both vehicles’ safe and efficient charging.
We strongly advise against the use of non-smart splitters due to the potential fire hazards they present. Opt for smart splitters if setting up a dedicated outlet proves too challenging.
The device is engineered to enable EV owners to share a dryer outlet with their EV charging station. While the primary Dryer Buddy model constantly keeps both outlets live, the Dryer Buddy Plus AUTO introduces the auto-switching feature.
Here’s a breakdown based on our extensive experience and feedback from clients:
As described by BSA Electronics, the manufacturer, the Dryer Buddy Plus AUTO is an enhanced version of the original Dryer Buddy Plus model.
Though we haven’t interacted directly with this device, a couple of our clients have. Gleaning concrete insights from neutral reviews can be challenging, so if you’re on the hunt for further information, you might want to explore brands like SPLITVOLT or NEOCHARGE.
This US manufacturer and its splitter was known to us long before the advent of electric car chargers. How does it compare now?
In summary, the AC WORKS Safety Switch Y-Cable provides durability, convenience, safety, and compatibility, making it a reliable choice for multiple appliance connections.
It’s crucial for potential users to evaluate their needs and ensure that the Y-Cable aligns with their appliance requirements.
The AC WORKS Safety Switch Y-Cable, based on our experience and feedback from clients, emerges as a sturdy and reliable choice for specific needs. This nifty tool’s packed with perks, but a heads-up: double-check if it vibes with your EVSE.
Based on our extensive experience with equipment installation, we advise against using all types of equipment indiscriminately. Instead, we recommend opting for smart splitters for chargers and dryers, such as Splitvolt and Neocharge, or the more cost-effective AC Works switches. If you don’t intend to upgrade your wiring, it’s best to steer clear of Y-models. This strategy has consistently allowed our customers to efficiently use multiple devices from a single outlet for years, and we believe it will serve you just as effectively.
Is it legal to use a dryer outlet to charge a Tesla?
Yes, it’s legal. However, you should ensure you have permission to use the outlet, especially if it’s not your property.
What charge rate should I expect when using a dryer outlet NEMA 10-30?
You can pull 24A on a dryer outlet, which is easily sufficient for overnight charging.
How do I know which adapter to use for the dryer outlet?
Can I use an extension cord with the mobile adapter for the dryer outlet?
Yes, but ensure an EV extension cord is of a thick enough gauge to handle the current, especially for longer extensions like 50 feet.
How do I know if the dryer outlet is suitable for charging?
First, determine if the dryer is electric, then get the right adapter. RV stores often have long extension cords that can handle high amp loads.
What if the dryer outlet is constantly in use?
You can use a splitter, like the Splitvolt, so you don’t have to keep swapping plugs. This is especially useful if the dryer outlets are not robust enough for constant plugging and unplugging. More in this expert review.
How do I identify the type of plug the dryer outlet has?
Look it up on resources like our NEMA Plug Chart.
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