I have been to a few sites now where the inverters are located on concrete pads. Most have had 3 to 5 feet of clearance by the way of concrete in front o the inverter doors that makes or a nice surface to work on. Setting a ladder up here to work is and safe. The picture below is a different story. Roughly 8" of the pad then a 6" drop to stone that tapers away. Not a safe place to work. Not sure if this comes to play with the code and the clear working clearance in front o the equipment. If its not a violation it should be.