Unless I'm mistaken, there is no way to repair Alliance War siege equipment (ballistae, catapults, etc.) in your inventory, making it so that once something is deployed it is nearly- if not entirely- impossible to pull it back to inventory at full health, leading to inventory or bank slots being cluttered with multiple lines for the same item.
Has there been some reason given why there is no option to repair them in inventory like armor? Or, if it (for some reason) hasn't been considered, maybe y'all can consider this ZOS? (or also a very brief period- even just a few seconds- after deployment or repair before health starts to drop).
Or maybe I'm just doing something wrong and somebody can correct me xD