Combining two area charts with different x and y-values

[Jahnow]

I need to have two area charts combined, but they have different x and y values. Is there another way to do this, because I think the area graph would be of great help to describe what I'm working on, instead of a xy scatter plot.
When I try to combine them in one graph, I can only use one x-axis value.
In the excel sheet the PV needs to be the x-axis.
Thanks in advance!

[Andy Pope]

You do know that currently your horizontal axes are categorical axis and not true value axis.

If you plot as xy-scatter then the horizontal axis will be value.

You can get 2d area chart to use a value axis by treating it as dates, but this requires the factoring up of the existing data.