THE SINGLE BEST STRATEGY TO USE FOR UPS APC

1st, the challenge you won't have: You will never have double conversion. If 1 UPS is on, the opposite won't be. The UPS linked to the wall, if changing, will preserve the second UPS from converting as it may have AC enter.The 1 plugged to the wall would feed into the next, which might keep bypassed, right until the just one plugged in the wall die