You are probably pushing the limit with that 6/3 for 48A continuous, did you or your electrician de-rate via dial in charger?
I think you are doubling up, I think you could run at 40 just fine.Agreed. I was thinking the same thing when I saw the photos above. Based on NEC Table 300.16 I think the right setting would be 32 amps. Romex 6/3 has an ampacity rating of 55 amps, multiply by 0.82 to account for ambient temperatures up to 40 C (104 F) which equals 45.1. Multiply that by 0.8 for the recommended safety buffer which give you 36.1. Any setting below that should be good, although I don't know how conduit affects that.
* The above calculation is based on my knowledge of code which is probably wrong. Don't take wiring advice from an internet forum.😆