It is not a positive effect. There is a reason why we have tech to "call a rain" for a long while, but use it only rarely on specific occasions.
The laws of thermodynamics are inexorable - if something has arrived, somewhere it has gone from...Eggheads should focus their research on places where there has will loss rather than gain.
I just watched a video on how covering the Sahara in solar panels would change the climate and likely kill the amazon rainforest. Dangerous to play eith climate like that.
So if we cover the UK in solar panels it might take some of the rain from Ireland. It's win win really 😅