Hansshow introduces a significantly upgraded, second-generation NACS-to-CCS1 DC fast-charging extension cable. According to State Of Charge‘s initial tests, the latest version is very promising.

The need for a DC fast-charging extension cable in North America arose when Tesla opened its Supercharging network to non-Tesla EVs. The company’s older V3 dispensers, of which there are thousands, have relatively short cables and often can’t reach the charging ports on various EV models (on Tesla, the location is standardized). Non-Tesla users sometimes try to connect by taking more than one stall, which is not ideal and can be impossible if only one stall is available.

Another instance when an extension cable might be useful is for EVs with trailers. That’s simply because there aren’t many charging stations with pull-through stalls.

Hansshow NACS-to-CCS1 Extension Cable 2.0

State Of Charge received a prototype of the second-generation NACS-to-CCS1 extension cable from Hansshow for testing purposes, which proved to be significantly improved compared to the first version, which wasn’t ready for prime time.

The Hansshow product is actually a combination of an extension cable and a NACS-to-CCS1 adapter. One could even say that it’s an extra-long NACS-to-CCS1 adapter. For reference, A2Z EV is working on a NACS-to-NACS extension cable (so the adapter, if necessary, would need to be added on top of the extension cable).

Our very own Tom Moloughney discussed several aspects of the Hansshow NACS-to-CCS1 extension cable in his video and tested it with two EV models.

The Length: 5 or 8 Feet

The new, second-generation version has two lengths: 5 feet (1.5 m), like the initial version, and an 8-foot (over 2.4 m) option. A 5-foot length should be acceptable in most cases (see Tom’s tests with several EVs), although a longer cable is more comfortable to use.

Having the choice between two versions, one of which is 8 feet long, is definitely a big plus.

NACS-Side Safety Switch

One of the most important safety concerns of the first-generation cable was the mechanical release on the NACS end, which could be accidentally physically disconnected during charging. In the second generation, an electronic safety switch is included. It shuts down charging before the NACS end can be disconnected from the Supercharger plug. That’s a critical improvement, which opens the way for commercialization.

Tom tested the safety switch on the prototype, and it worked as promised, immediately shutting off charging.

On the CCS1 side, an electronic safety switch was already installed, so there was no issue.

Power and Current Ratings

The new Hansshow NACS-to-CCS1 extension cable supports a higher current than the first version. According to the manufacturer, the product is rated for 350 amps (continuous current, we believe) and 1,000 volts. That’s a major increase, compared to 250 amps previously.

Moreover, the company states that the cable shouldn’t have any issues handling a higher current, such as 500 amps, for a limited period. This is the second most important change.

According to specs, the power rating is 250 kW, although the power level may be higher temporarily. The key factor is the temperature, measured on both ends of the extension cable. The cable will automatically shut off charging if the temperature reaches 185°F (85°C), “providing enhanced protection and peace of mind”.

“Built-in dual intelligent temperature sensors actively monitor heat to prevent overheating, making it the perfect companion for Supercharger stations and getting you back on the road sooner.”

“The cable is constructed with high-purity copper cores and a TPE outer sheath, designed to withstand extreme temperatures ranging from -40°F to 185°F. The high-purity copper provides excellent conductivity, while the TPE sheath offers outstanding resistance to both cold and heat. This combination enhances the durability and reliability of the cable, ensuring stable current transmission even in harsh conditions.”

The product is not UL-certified as a whole, although Hansshow notes that all components are individually UL-certified.

Tests

State Of Charge tested the Hansshow NACS-to-CCS1 extension cable 2.0 in winter conditions at a Tesla V3.5 Supercharger (V4 dispenser powered from a V3 power electronics cabinet) with two EVs: a Ford F-150 Lightning and a Rivian R1S.

To maximize the stress on the extension cable, the charging sessions (from low to approximately 70% state of charge (SOC)) were conducted one after another.

The most important finding from the tests is that no issues were observed. That’s good news compared to the first-generation test, which quickly overheated (these tests were conducted in the summer, though).

According to Tom Moloughney, the Ford F-150 Lightning’s charging session from about 8% to 76% SOC proceeded as expected. The highest observed temperature was 62°F (17°C) in the cold weather conditions.

The session with the Rivian R1S, from low to about 70% SOC, also went well, with no charging or thermal issues.

Tom plans to keep the prototype for several more weeks for further testing, potentially at higher ambient temperatures.

Hansshow NACS-to-CCS1 Extension Cable 2.0 Sales

According to the State Of Charge video, Hansshow is preparing to launch the NACS-to-CCS1 extension cable 2.0 for retail sale in early 2026.

The company recently began accepting pre-orders for the Hansshow NACS-to-CCS1 extension cable 2.0 with an estimated shipping date in mid-January. That’s even earlier than expected in the video.

The website lists prices for both length options, which are slightly higher than the $599 pricetag for the first generation, but the second generation is a much better product.

Additionally, we received info that the “STATEOFCHARGE” discount code will get you a 20% discount, making the deal much more attractive:

• 5 feet (1.5 m): $503.20 with “STATEOFCHARGE” (-20% or -$125.80 from $629)
• 8 feet (2.4 m): $583.20 with “STATEOFCHARGE” (-20% or -$145.80 from $729)

Summary

The new Hansshow NACS-to-CCS1 extension cable 2.0 appears very promising, as it works fine during initial testing.

It might be a useful solution for drivers to access Tesla V3 Supercharging dispensers with non-Tesla EVs (which are CCS1-compatible and with a charging port location different than Tesla). Additionally, some might use it to charge large EVs or EVs with trailers.

As of today, the product is a combination of an extension cable and a NACS-to-CCS1 adapter. The question is whether there will be a NACS-to-NACS extension cable available as well, as there are now EVs with NACS charging ports (sometimes located in different places).

The price of the second-generation is triple the cost of a simple NACS-to-CCS1 adapter (usually less than $200), but given that cables are relatively expensive and their production scale is not very large, $503-$583 appears fair. At least for now, customers have an option.

It’s also worth a shout-out to Hansshow for upgrading the product and sending us the prototype for testing, despite Tom’s initial critique of the first generation. That’s a really positive outcome.

The one last remaining piece of the puzzle is the product’s safety certification and whether particular charging networks will accept the use of such extension cables. We know that Tesla does not permit the use of third-party charging equipment that has not been approved by Tesla or its NACS partners (including other automakers). As we wrote before, this places the responsibility for any  issues on the user.

Some comments under the video point out that the upgraded safety features may still be insufficient to obtain UL certification for the product (no physical interlock for the NACS end, when the CCS1 remains locked, to cover all potential fault modes).

Video timestamps:

02:58 Comparing the Gen1 to the Gen2 proptoype
11:33 Charging Tom’s Ford F-150 Lightning and his Rivian R1S with the extension cable
17:37 Thoughts after using the Hansshow Gen2 extension cable