There is no limit on how many PSU’s you can stack with the PSU-Stacker. You can make a chain or connect them all to your main supply. So why buy a expensive large PSU if you can stack 2 or more cheaper PSU’s? Or why sell your old PSU if you just can add another PSU with the PSU-Stacker!
The PSU-Stacker is also a great way to stack your PSU’s for your mining rig. Do you have a large mining rig with multiple PSU’s stack them with the PSU-Stacker.