Two graphs with different axis scaling

Hello all,
I have already read some posts and am thrilled by the helpfulness of many users.
Thus, I would also like to turn to you.

I am trying to create a diagram in which on the one hand my power consumption is shown, which can also go into the negative because of a PV system, and on the other hand the solar curve, which in this case only has positive values.

How can I adjust the right axis so that the zero is also at the level of the zero of the consumption? So in principle move it upwards.

I hope that there is a simple solution.

Thank you very much!