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I have been using Bookstack, I like it though it is missing a few features I would love:
- you cannot insert a video in it
- there is no possibility to comment on a particular text
- the permissions management is only done with roles. That’s fine generally but I wanted to be able to share a specific page with a specific user, and for that I had to basically create a dedicated role for this use.
To complete that good answer, satellites in GEO will experience eclipses 2x21 days per year (around March and September). The eclipse duration during these periods will vary from 0 to 70minutes and then down to 0 again, with one eclipse per day, around midnight.
So your solar plant in space will work 100% of the time 320+ days a year, and will have a small down time that can be up to an hour in the middle of the night otherwise. Not perfect but actually very manageable with a little bit of storage on the ground.
Overall, the main concern with these systems is the total cost, including launch cost. It is hard to tell if it will be competitive with solar + battery on the ground.