The side panels and basins from the water carts and the Sea were made of bronze (see 1 Kings 7:25–40). Ahaz might have used them to pay tribute or for another project.
on account: At the king of Assyria's request, Ahaz removed the canopy leading to the inner court and the king’s private temple entrance. Judah lost much freedom because Ahaz trusted the Assyrian king's military help (2 Kings 16:7–8, 10).