Yes - it was a popular AGW denialst go-to in the early 2000s until the increasing temps continued completely independently from the 11-year solar cycle. It's been pretty thoroughly debunked now, e.g;
I guess my thinking is more along the lines of the right sun spots and solar events in the right places - i.e. with enough energy directed in the right plane to affect earth systems. Maybe it could be fruitful to explore radio blackouts caused by solar storms - to see if correlation with temperatures could exist. That could falsify or verify such a correlation and further analysis as well. Just a thought
https://www.nature.com/articles/s41561-018-0293-3