Did you install the packages as outlined here:
https://forum.openwrt.org/t/new-battery-power-router/52799/8
In
https://forum.openwrt.org/t/re-new-battery-power-router/96434/4
I spent some time to write an elaborate reply to your questions with detailed hints. How is your luck with those? The attachments mentioned I can send as soon as I have an email address. The forum rejects them.
PS.: The reply that I mentioned I wrote as an email replying to what I thought was a personal email question. This is unfortunate as I was attaching some files that the forum software acting as a relay rejected. I really wished the forum software made it in email more obvious that replies would go public. The only hints are in HTML and pictures, the display of which is switched off by privacy and security aware people like me.