I purchased the Level II SPX Power Express for it's portability!
Since I live in Ohio, charging stations are far and few...
That got me to thinking. At my house I have a standard (NEMA 6-50R) welding receptacle in my garage, barn, and house, and also across town at my parents house. My welder has a male cord that the end can be changed from a (NEMA 6-50P) to a standard 3 prong 15A male plug. The new welders sense what voltage source they are connected to automatically.
I simply replaced the SPX Power Express male cord and plug that it came with, with one just like my welder has, so I could easily switch the male plug from a Level I configuration to a Level II configuration in seconds. The level II configuration uses the (NEMA 6-50P) plug.
Then I realized that Miller makes an inexpensive adapter model #300517 that I can plug the Level II (NEMA 6-50P configuration into and adapt to any (NEMA 14-50R) which is the same 50A receptacle that is found at every campground in the country!.
If anyone is interested in this set-up, when I figure out how to post pictures, I'll post pictures and part numbers.