That's a really cool idea. I just had two small solar cells on one side of the case which made it very directional. I'd toyed with the idea of building a little "housing" that was fixed to the pole where it could only enter in the correct orientation but I got lazy/impatient and just ran it up.
Seems like that case would help a lot. My first worry was series vs parallel, but that is helpfully called out in the README (with these three panels in parallel) and if they were in series it'd likely be WAY too much voltage (depending on the charge controller).
As long as the mounting location gets decent sun from at least one angle for a good part of the day, that looks like an awesome solution. I'm bookmarking it for future builds, so thanks : )
I'm not who you asked but.... I've never heard much good about jackery and they're comparatively super expensive. Though, admittedly I haven't price compared in several years. When I was looking, jackery was still using lipo batteries instead of the lifepo4, while being more expensive, so it was easy to discard them. Surely they're using the newer chemistries now...
You might check into ecoflow or bluetti.
Edit: I have quite a bit of bluetti stuff and haven't had any problems except with a folding 220w solar panel that was "free" with a battery purchase. It works, but not remotely close to spec even in ideal circumstances... Might be a reason they were giving them away : )
The batteries/inverters have all done well though the passive drain is significant.