So I just spent twenty grand on a vertical setup for Colorado and I haven't decided on the type of system to use in my sealed room/rooms. Feel free to weigh in more experienced growers please.
Have you purchased a loadcenter and/or flip for your ballasts/lights. I would get a custom loadcenter if you're running 24 ballasts and no flip. A 200A/240V panel with all the receptacles to power all the 120V and 240V peripperal equipment. Then you can get options like PLC time delay power off and on, digital thermal shutoff, motion/flood/fire shutoff, digital ammeters, wireless, etc.
Whatever you get for a loadcenter make sure it's not cheaply made. Have a look inside and check all connections. Make sure they're aren't terminal lugs crimped onto solid copper wire, should be stranded. 24KW, plus all the other equipment is about 30KW to 35KW.
If you get a custom loadcenter with options, this is what it should look like. If you have several pumps and solenoid valves another controller with a PLC can control all that plus flood sensors, temp sensors, float valves, etc. Hundreds of different time programs can be set with a PLC.