One suggestions for the AC Disconnect - Engineeer775 puts in a Double Throw Disconnect instead of the simple disconnect. In the Down position it bypasses the Sol-ark and feeds the Critical Loads panel from the Main breaker panel. In the Center position it cuts off all power past the Main Breaker panel. In the Up position (normal running position) it feeds the Sol-Ark from the Main breaker panel. With the double throw switch, if you have to take the Sol-Ark or down-stream systems down for maintenance, the critical loads still gets fed with a simple switch lever. Something similar to this double throw one -
https://www.homedepot.com/p/GE-60-A...-Double-Throw-Safety-Switch- worktime -TC35322/202978651
Also, you may need to show the low voltage wiring for the actual RSD switch/button & TIGO Transmitter. Right now it just shows the TIGO transmitter hanging out there. There is an output on the Sol-Ark that feeds the low voltage power to the transmitter and then also has a circuit for the RSD button/switch that emergency personnel would use to shutdown the panels. I think there's a schematic in the SA manual showing the RSD wiring.