@dthompsonQJC3N archi-lab.net has nodes that can write excel files without the need for Excel to be installed. They are under EPPlus section of the library. That would alleviate your immediate need.
However, If I understand your end goal correctly, you are trying to pull coordinates of some generic models into a schedule (key schedule). I would not write that data out to Excel only to later import it back in unless there was some advantage to having it in Excel. I would just build the Key Schedule directly in Revit from that data. That’s my 2 cents.