solar panel adjustment

better yet, put the modules at latitude and leave them there.  you are likely to see between 2 and 8% total losses from seasonal adjustment if that.  Don't make it harder than necessary.  Plenty of people have non-adjustable arrays.  set the array to the angle = to the degrees in latitude of the place you live.

- james Alt-E staff

Have you ever opened one of those older style wooden windows with the counter weights hidden in the jambs and attached to the sash with rope across pulleys on both sides?
I cant say that this would be any easy fix or that it would be a quick or inexpensive fix because I cannot see just how your array rack is built and so on.
The idea is simple though. Two poles, one at each end with a beam across them to support at least two pulleys, tie a couple of ropes onto the array rack, toss them over the pulleys then tie on the counter weights. Of course the are always things to consider such as safety and longevity. If your not sure just how to go about doing something like this or where to get materials for the job, check to if there is an awning company in your area the makes pull up canvas awnings still. Shucks! looking at some retractable awnings might even give some better ideas of your own on how to deal with this minor hitch.