Here is an interesting video about Ed Mazria. He is one of the early pioneers in passive solar energy. He wrote The Passive Solar Energy Book.
https://www.autodesk.com/redshift/ed-mazria/
http://diysolarforum.com serves a 301 redirect to http://diysolarforum.com/index.php
http://www.diysolarforum.com serves a 301 redirect to http://www.diysolarforum.com/index.php
Both of these are insecure servers.
I would recommend changing both to redirect to https://www.diysolarforum.com
I am not satisfied with the BMSs that are out there so I decided to make my own.
Here is a list of some of the features I would like:
Maintain battery balance.
Low temperature charging cut off.
High temp load shedding.
Display for all voltages (like the ISDT BattGo BG-8S Battery Meter)...