Fuse block used in reverse as combiner?

I made my own combiner box from off-the-shelf parts. A plastic exterior rated box with a gasket and two lug strips pulled from an abandoned load center. The run to the controller is interrupted by a manual resettable circuit breaker. The function of the circuit breaker is to interrupt power from the module so that I can work during the day, downstream, without any current present.

Here is the combiner box, an LB. I have the wires in conduit to the controller location:


Watertight box entry:


Here is the manual breaker used as a switch:
Cooper-Bussmann manual circuit breaker