The TRC 40250 Transfer Switch has a data connection to the Aladdin system. It is a great display, you can monitor amp, voltage, solar, etc. on the Aladdin display. A Signature has the ability to easily exceed 50 amps & I could watch the amps as things were turned on. That was even more useful when on 30 amp power. Mine failed in Mexico so I dissected it there, what a mistake! I didn't realize there are no replacements that communicate with the Aladdin system. I replaced it with a Southco 40350RVC and remote display which works great but I sure miss that data on the Aladdin.
I also had the Automatic Energy Selector fail a few years ago. I replaced it and bought a spare. Since it controls the rear A/C unit I want to be able to do a quick one time repair and get the A/C going again.