Solved First Post! Charging from NACS and J1771 Cracked!

[starkasim]

Solved! Tesla (NACS) and J1772 Charging for Stark Varg

First time posting here. I’ve been searching for a while and couldn’t find a clear, working solution for charging my Varg MX from Tesla or public Level 2 chargers, so I figured I’d share what I got working. Please note: This DOES NOT work with Tesla SuperChargers. Don't even try it! Wall Connector and Destination Chargers only!!!

Goal:
Be able to charge the Varg from:

• Tesla Wall Connector / Destination chargers (NACS)
• Standard J1772 Level 2 stations

Portable Setup:
I removed the stock charger from the stand and mounted it in a weatherproof portable storage box so I can carry it on the bike and charge while out riding. Still looking for a good mounting option for the box.

Solution (what I used):

• NACS (Tesla) → J1772 adapter (A2Z Stellar)
• J1772 → NEMA 6-50 EVSE adapter (must emulate a vehicle)
• Stark Varg charger (mounted in portable case)

Setup chain:
Tesla Charger → A2Z (NACS→J1772) → J1772→6-50 adapter → Varg charger

Results:

• Charging starts immediately (no fiddling)
• Stable at ~3.3–3.5 kW
• No dropouts or overheating
• Works on both J1772 stations and Tesla Wall Connector

I’ve already tested:

• Public Level 2 station (Charge Point) → worked perfectly
• Tesla Wall Connector → worked instantly
• Added ~10% charge in ~20 minutes

Bonus:
Same setup works for my 72V mini truck charger as well.

Notes:

• Your J1772 → 6-50 adapter needs to properly emulate an EV (cheap passive ones won’t work)
• Charging speed is limited by the Varg charger (~3.3 kW), not the station

Conclusion:
This effectively turns Tesla and J1772 infrastructure into a usable Level 2 charging network for the Varg, and makes mobile charging on rides totally doable.

Happy to answer questions if anyone is trying to do something similar.

 

[jcozine]

I'm still trying to figure out if I will get 240v (3.3kW) charging using the following chain:
1. J1772 -> Nema 5-15 adapter (available for $35 on amazon, apparently passes 240v through)
2. Nema 5-15 -> L14-30P adapter that came with the bike for 120v US outlets
3. L14-30P 3.3kW charger -> to MX1.0 bike

Can you confirm? Or will the 120v adapter in the middle reduce my charge rate to 120v/1.6kW? From what I'm gathering these adapters just lose the neutral pin, which I guess our chargers don't use anyway, so maybe it won't know the difference.

Alternatively, do you have any links to the J1772 -> 6-50 adapter you had success with?

 

[starkasim]

Hey there!
I think you’re over complicating it a bit. The 120V adapter in the middle is almost certainly going to drop you to ~120V / ~1.6kW charging.

The key thing is:

• The stock 120V adapter that came with the bike is not “transparent”
• It’s specifically designed to let the charger run from a standard household outlet
• So once you introduce that adapter into the chain, you’re no longer preserving the full 240V path

That’s why I went a different route:

• J1772 → NEMA 6-50 EVSE adapter
• Not sure if its because I'm in Canada, but my charger has a native 240v plug and an adapter for 120v. So I use this Nema 6-50P to L14-30R adapter
  

  Tellegloww 30 Amp Welder Adapter Cord Compatible with NEMA 6-50P to L14-30R, 3 Prong 50Amp Welding Outlet to 4 Prong 30Amp Generator Locking Plug Adapter, Generator to Welder Adapter STW 10 AWG, 1FT : Amazon.ca: Patio, Lawn & Garden

  Tellegloww 30 Amp Welder Adapter Cord Compatible with NEMA 6-50P to L14-30R, 3 Prong 50Amp Welding Outlet to 4 Prong 30Amp Generator Locking Plug Adapter, Generator to Welder Adapter STW 10 AWG, 1FT : Amazon.ca: Patio, Lawn & Garden

  www.amazon.ca
• No 120V adapter in the middle

With that setup I’m consistently seeing:

• ~3.3–3.5kW charging
• Works flawlessly on ChargePoint J1772
• Works on Tesla Gen 2 Wall Connector via A2Z NACS adapter
• Older Tesla Gen 1 destination chargers were flaky (would fault after ~5 min)

The J1772 adapter I used is from EVSEAdapters:

J1772 EV Charger to NEMA 6-50 Adapter

Our new J1772 to NEMA 6-50 adapter makes it easy to plug in and use your welder, or any appliance that has a NEMA 6-50 plug, at all public J1772 charging stations. This adapter works by using a specially designed circuit inside the plug that basically tricks the charging station into thinking a...

evseadapters.com

Note for the J1772 to NEMA 6-50 make sure it actively emulates a vehicle (important). Cheap passive adapters won't work.

The big thing is:
The Varg charger itself supports 90-260VAC input, so its perfectly happy on full 240v

So if you want full-speed charging:

• Preserve the 240V path end-to-end
• Don’t insert the stock 120V adapter into the chain

That’s been rock solid for me so far.

If you are also NACS (Tesla), the you will also need the NACS to J1772 adapter from A2Z Stellar:

NACS Charger To J1772 Vehicle | AC | UL2252/CSA-C22.2 Certified | The

The first UL2252/CSA-C22.2 certified NACS to J1772 adapter. Key Features : Power : Can charge up to - A2Z EV

a2zev.com

Hope this helps! Let me know if you have any other questions or concerns.