purcase repairtime

48h =2 d you already had 12h available (standard) so 3x2d+12h give the 6d 12h

You can buy the addition repair time to last for 7days or 30days

The other type of repair that is available is via crates in the bundles where you can add instant repair time to an individual base.

Funny that EA doesn't offer purchasing instant RT. A lot of money waiting to be made. lol

They do offer instant RT crates as part of their bundles. Not much in each bundle however and the bundles can be expensive if all you want is the instant repair time on one base.