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2/0 Welding cable for the EV battery pack

There are plenty of EV sites on the web and all seem to offer different advice on the size of cable needed for the battery pack. I have read some say 1/0 welding cable is fine, while others recommend up to 4/0 welding cable. (Welding cable seems to be the best choice since it very flexible and ideal for routing through the car). I am going to assume the 4/0 is for the higher volt/amp  packs... i.e. 144 volts or greater. Since our little electric vehicle is planned at only 48 volts I would think that the 1/0 welding cable would do just fine. But since I found a great deal on a 50 foot, 2/0 welding cable (free shipping) and to top it off it is made in the USA. The 2/0 cable also allows me to change the battery pack voltage later if so desired without the need to upgrade all the cable.

Here is where I purchased my welding cable :: Harris Welding Supply.

50 foot of 2/0 welding cable