Those little clips make a big difference. They use capillary action to help remove the standing water from the edges and work like a charm.
20x480 is a pretty good system to start with! And yes, insight comes with time, I'm lucky in that I already did a ton of this stuff while in Canada 20 years ago so now I can re-use that knowledge. One of the better things I did here is to create a covered space next to my garage that uses the panels as roofing. Two birds with one stone: very nice covered space and glass-glass panels allow some light to shine through and it helps keep the panels cool because there is plenty of airflow underneath them. Mounting them flush with some polymax in between to make it all watertight was a bit of a job though.
20x480 is a pretty good system to start with! And yes, insight comes with time, I'm lucky in that I already did a ton of this stuff while in Canada 20 years ago so now I can re-use that knowledge. One of the better things I did here is to create a covered space next to my garage that uses the panels as roofing. Two birds with one stone: very nice covered space and glass-glass panels allow some light to shine through and it helps keep the panels cool because there is plenty of airflow underneath them. Mounting them flush with some polymax in between to make it all watertight was a bit of a job though.