I did some research on it. The basic read is the info is legit however it involves a bit a time and are mechanically inclined. The savings comes in you labor and doing your homework like used equipment like batteries. Be a good hobby I guess in your spare time. The panels in the books put out about 75 watts. Not sure on the panel dims. The panels I use are about twice the output and about twice the cost of the panels without giving up a weekend for them. I'm not too keen in using used parts in a "new" system. It will be constantly nickel and diming you along the way
Just my humble opinion from experience
