EV Charger Extension Cable 40A J1772 — 21 ft Cord, 120V-240V Compatible
Compatible with: All Tesla & J1772 EVs · 120V–240V systems Product Highlights ⚡ 40 Amp / 21 ft — High-current extension for 40A Level 2 chargers; adds up to ~35 miles of range per hour on compatible EVs ⚡ J1772 Male → J1772 Female — Universal connector; works with every...
About this product.
Compatible with: All Tesla & J1772 EVs · 120V–240V systems
Product Highlights
- ⚡ 40 Amp / 21 ft — High-current extension for 40A Level 2 chargers; adds up to ~35 miles of range per hour on compatible EVs
- ⚡ J1772 Male → J1772 Female — Universal connector; works with every Level 2 charger brand and all EVs including Tesla (with Tesla's J1772 adapter)
- ⚡ 240V Rated — Supports up to 9.6 kW without any power loss or speed reduction
- ⚡ Heavy-Duty 6 AWG Wire — Zero heat buildup at 40A continuous draw; weatherproof jacket rated for outdoor use year-round
- ⚡ Safety-Certified — UL/ETL listed; IP44 water-resistant connectors
What's in the Box
1× J1772 Extension Cable (40A, 21 ft) · Cable Organizer Strap
Fitment
Universal J1772 compatibility. Works with Tesla Model 3/Y/S/X/Cybertruck (requires Tesla J1772 adapter), Chevy Bolt, Ford Mustang Mach-E, Rivian, BMW, Audi, and all J1772-equipped EVs.
Why ThePartsCar?
- ✅ US Warehouse — ships within 1–3 business days
- ✅ 30-Day Returns — hassle-free, no questions asked
- ✅ EV Charging Experts — we test every cable at rated amperage before shipping
Specifications
| Installation | Easy |
|---|---|
| Warranty | 1 Year Manufacturer Warranty |
| Compatibility | Tesla Model 3, Tesla Model Y, Tesla Model S, Tesla Model X, Tesla Cybertruck, J1772 EVs |
| In the Box | 1x J1772 Extension Cable, Storage Bag, User Manual |
| Ships From | United States Warehouse |
| Shipping Time | 1-3 business days handling, 3-7 days transit |
| Returns | 30-day hassle-free returns |
Browse More
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Frequently Asked Questions
Does this fit my Tesla vehicle?
Yes — this product is verified compatible with Tesla Model 3, Tesla Model Y, Tesla Model S, Tesla Model X, Tesla Cybertruck, J1772 EVs. If you have a specific year, trim, or facelift (e.g., Highland, Juniper) concern, please contact us at kentuckyeellc@gmail.com before ordering.
Where does it ship from?
All orders ship from our United States warehouse. Handling takes 1-3 business days; transit is typically 3-7 business days within the continental US.
What is your return policy?
We offer 30-day hassle-free returns. Items must be in original condition. Email kentuckyeellc@gmail.com to start a return.
Is installation difficult?
Installation difficulty is rated: Easy. No professional tools are typically required. A detailed installation guide is included or available on request.
What is the warranty?
This product is backed by a 1 Year Manufacturer Warranty. Manufacturing defects are covered; normal wear and misuse are not.
Is ThePartsCar affiliated with Tesla, Inc.?
No. ThePartsCar is an independent aftermarket parts retailer. We are not affiliated with, endorsed by, or sponsored by Tesla, Inc. Tesla and Model names are trademarks of Tesla, Inc., used here solely for fitment reference under nominative fair use.
Compatibility & Trademark Notice: ThePartsCar is an independent aftermarket parts retailer and is not affiliated with, endorsed by, sponsored by, or otherwise connected to Tesla, Inc. References to "Tesla," "Model S," "Model 3," "Model X," "Model Y," and "Cybertruck" are used solely to indicate vehicle fitment and compatibility under nominative fair use. Tesla®, Model S®, Model 3™, Model X®, Model Y®, and Cybertruck® are trademarks of Tesla, Inc. All product names, logos, and brands are the property of their respective owners.
Safety & Compliance: This accessory must be installed and used in accordance with the U.S. National Electrical Code (NEC), including Article 625, and all local codes. We have not independently verified a UL/ETL listing for this specific item; if certification is required for your installation, please confirm before purchase by emailing support@thepartscar.com. High-amperage connections should be made by a licensed electrician.
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Write a reviewExtension I needed
Charger reaches my second parking spot now. Connector ends seat solidly, no looseness or arc warnings. Held up to a wet driveway with no shorts.
Worth it to avoid moving the EVSE
I have a fixed Level 2 wall unit and didn't want to re-mount it. This solved the problem. Connects cleanly between the EVSE and the car.