The material is true enough in the video. This one builds on that first video
This one is similar but much more specific about how it works. Most Amish builds they adopt use passive methods. They didn’t originally come up with design in many cases but they do use the design and pass it down in the family.
The water pump that people refer to often that does not require electricity is also true enough
In addition there are many individual components I power using solar. Amish mostly just use solar to power freezers
Many amish systems plans are free