You’re probably ok. If you’re seeing 250V, unless something is very off, that’s an RMS average voltage. The peak of the sine wave will be higher - closer to 340V, which is 240/sqrt(2).
But if what you’re getting is not truly sinusoidal, it’s certainly possible and common to read a bit higher or lower. Measure with an oscilloscope if you absolutely must know (and have an o-scope handy).
Of course, all the usual caveats and so forth about advice from the internet.
how many of you know what I linked to w/o looking at it?
I couldn’t decide where to put this, so I guess I’ll default to here.
Today I got an email from Hyundai America asking to confirm my shipping address so they can send me a free NACS (Tesla) adapter. My Kona is a 2021 so I wasn’t sure if they’d send freebies for the older models.
Mine’s in Georgia for the 2024 Ionic. Nice to have but I’m still on the freebie Electrify America lease. No real need along the east coast where I/we do our road trips.
Of note, the last navigation update borked the speed limits - weird. Also the nav got lost around Richmond Va trying to avoid a backup on I-95. Our first clue was a requested turn onto a gravel road AFTER driving 10 miles thru Deleverance country. Google maps to the rescue.
I got a free adapter when I got my Ford EV. Took about 3 months to get shipped to me. I have yet to charge anywhere other than my house, but it’s nice to know I can use a Supercharger if I need to.
My Tesla came with the opposite connector which I briefly used once in a hotel parking lot just to see if it worked
Jealous. I’m still waiting for my invitation 
This rollout has been less than spectacular, to put it mildly.
If I remember right, yours is a little older than mine? Hopefully they are just working their way through the customers backwards.
It was, but that was a lease. I since bought a 2024 Kona when I turned that 2020 in.
We use this for home charging of the Tesla.
How does Tesla charge for the electrons when you bring a non-tesla to a supercharger? For the Tesla, the charger “knows” the car and bills your account (or gives you free charging if you’re fortunate to have the free charging for life)
You need to get an account with the appropriate Tesla App.
In other news, Jaguar is buying back my 2019 iPace due to a safety issue. So, I’m suddenly in the market for a new EV. Despite the recall, I am seriously considering getting another iPace. I really love the car, and I believe they have fixed the 2019 problem.
One of my sisters was able to end her lease and get some money returned to her under a lemon law on her Jaguar EV two years ago. I can try to get more details if you’re interested. It may have been a fluke but do your research.
Thanks. They are going to pay me for it (owned, not leased). I’m waiting to hear the offer, and curious if they’ll negotiate. The car is almost 6 years old, but it excellent condition.
Cadillac is coming out with a new EV, the Celestiq. You should take a look! 
Wow. I actually like that. I could pay that much for a car, but I don’t think I want to. (Starts in the mid $300k range)
Maybe working forwards? 
The email just came yesterday, so keep watching for one. And check your spam folder. The subject was “
A Gift 4U: Complimentary Charging Adapter, [Troutman]”. I almost deleted it thinking it was junk.
That’s helpful info, thanks!
Be sure it can handle CCS level 1 or level 2 as well as DCFC. When I bought an adapter for the other way – NACS to CCS – the description said a couple times it was for fast charging only, not at home or destination charging. When I got the adapter, on the CCS end the pins for CP and PP were there, but the two for AC were not.
I can recommend an Ionic 5. Been faultless (the nav is okay for the most part-does android/apple too). The SEL will do an honest 280+ around town and 230 at highway speeds in the summer heat. Has the fast charging architecture. Wife and I plus occasional grandchildren do 600 mile road trips comfortably. Eligible for the $7500 tax credit until the Trumpists step on their overhanging ties.