Yeah when its hot outside the unit will run constantly. You can also use some reflective bubble in your windows to reject the heat inside. That will help greatly, Try and park in the shade too.
I had ALL of my windows tinted with "Clear" (acuatlly 15%) window tint. This helped greatly and I only use the reflective bubble while parked for a while. The factory tint does nothing to reject heat. Its just a dark color on the glass.
Put a vent pillow in all your roof vents to reject even more heat.
You can try to modify your AC ceiling cover to help with noise. I was going to do mine in the spring but never got around to it. But they sell replacment covers that help. See link below.
2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor