In NC everywhere I have charged is by the KWs--generally 35 to 50 cents per KW. For sure your best bet is to charge at home where I pay about 15 cents per. As far as mileage estimates, my Lightning consistently gets about 75-80% of the 330 claimed (unless I drive less than 50 mph).
After Helene, I ran a refrigerator, standup freezer, and handful of lights for 4 days from my 220V outlet on my Ford Lightning. It has a 131 KW battery. I used less than 28% battery. It's possible I could have made it 2 week on a full charge. I'm still all in for all electric (for now anyway).
Hopefully someone at Scout Motors is monitoring these threads.
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You absolutely need to add a 240V outlet to the Traveler!
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It was one of the primary reasons I bought a Lightning so I could eliminate my house gasoline generator. I can't say enough about how useful it's was during...