I have a main panel and a critical loads sub-panel fed by a PV inverter + battery backup. I need to avoid overloading the normal capacity in the critical loads panel (50A), and I'm already at a comfortable max on that for normal use.
However I'd like to be able to run my garage door opener off of that panel selectively, so that I don't have any concerns about tripping the breaker backfeeding that sub-panel, but also be able to easily switch over to backup temporarily to still run the garage door opener during an extended outage.
Is there a standard/easy way to accomplish this? I suppose I could use something like the Square D QO1DM10030TRBR 30-Amp Generator Main Breaker Outdoor Manual Transfer Switch (and just remove the generator twist-lock receptacle from the bottom and instead feed directly from the critical loads sub-panel), but I wanted to see if there was a better way of accomplishing the same thing.
Edit: In an ideal world there'd be a way to a setup a "transfer switch" like this without require breakers in both the panels and in the switch itself.