All our products, except some series having the vertical stand option, cannot be mounted vertically.
The front or rear panel and the side of our products should not be at the top with the following reason:
Most of our products (especially power supplies and electronic loads) have an air inlet on the front panel and an air outlet on the rear panel.
If you mount them vertically, the front or rear panel may be at the top while the inlet or outlet may be at the bottom.
In order to securely hold our products in the vertical position, you need to use a stand, which can block their inlet or outlet.
Then, it may cause the internal temperature rise, resulting in the malfunction.

Note: PAT-T and PBZ series feature the vertical stand (VS01), which keeps the front panel on top.