[brian_]

Neither. For the frequencies involved in EV power, current carrying capacity is essentially dependent simply on the cross-sectional area of the conductors. Stranding is used to improve cable flexibility, not current carrying capacity.

 

[ejohnnyt]

Thank you for your information. I am fitting a new supply wiring harness to a 6.6 kw charger on my converted 1965 Falcon and I thought a fine stranded wire would carry more current and be a bit smaller and fit more easily through the cable gland.

 

[remy_martian]

To add to Brian's dissertation, solid wire in a vibration environment could be prone to work hardening and cracking/breaking. Snaking the wire is only part of the reason for wanting flexibility.