Does anyone know if it's possible to enter deployment rate of a certain type of fuel for different years? For example, 2% of solar energy deployment in 2030, 4% in 2035?

Thank you!

It is not clear where you want to input that particular (kind of) constraint.
Nonetheless, if you are looking only at demand analysis, you can directly indicate in he activity level, given that they are in share.

If required for generation of particular form of energy (basically electricity), you can use Process Share parameter to adjust them.

However if your model is a bit too complex, with different demand types with different interventions and different energy transformation modules, you might need to do it manually with multiple iterations.

If anyone knows a better way, I am also very eager to learn.

Regards,

Utsav