WAY back in the early days of the blog, you may recall I bought some smashing stainless steel VERY heavy solar panel mounts that enable a decent tilt. http://narrowboatellis.blogspot.com/2016/11/drilling-holes-in-our-new-roofeeek.html
In practice, because they are difficult to tighten/slacken without taking the skin of my kunckles, they only ever get tilted as much as the curvature of the roof will allow in their "flat" position. The reality of having 3 'house' panels of the roof is that they are quite heavy and when the wind blows, they bang around... right above the main bed - the result a very bad nights sleep.
SO - in the middle of the night whilst in Granary Wharf (Centre of Leeds near the station) about 3 am, saw me pottering about outside in gale force winds in my underpants (the winds being out side of my underpants), cutting chunks of kindling to wedge the panels fully one way in the direction the wind was blowing to stabilize them. This works quite well but the occasional "freak gust" can take the tension off, just enough for them to fall down ... and then of course, clonking resumes.
I even painted them grey to match the boat and whilst a bit naff looking, for the last few months they have proven their worth.