A couple weeks ago on a long 530 mile trip, I was down to 20% and stopped at EVgo to use $15 credits. The charging station was 350kw capable, I plugged in and took a walk to nearby market to use rest room and pick ups some snacks.
When I came back 25 minutes later and the car charge rate was below 45kw at i was only at 65%. The car said I needed another 40 minutes to get to 90% (not that I wanted to get that high) but I felt the this was too slow and I wanted to get on the road sooner. Interestingly enough there was about 15 Tesla charging stations just 8 stalls over. So I thought I'd try an experiment and switch to the Tesla (150kw) and see what that would do for me.
After connecting to the Tesla, it rose to 95kw and said I needed 30 minutes to get to 90%. I hung around another 15 minutes and it got me to 80% then hit the road again. With the Tesla it was only until the last few minutes that I saw the charge rate drop below 45kw. These EVgo was 72 cents/kW and Tesla 59 cents/kW.
It was not a scientific test by any means but it got me on the road a little faster and that was what I was hoping to achieve but YMMV.
This the forth time in the past year I've use EVgo and they've always the most expensive choice and I've always felt they were a little slower but it was only until that day did I get some general data to confirm that.
It is clear to me that EVgo is offering these discounts and free credits to draw customers to their charge stations but consumers aren't dumb and they need to start lowering their prices to compete with other companies and offer programs that dont exclude the Flying J's. My 2 cents.