Solar Water Heating I Want To Build My Own Solar Hot Water Heating System..Where Do I Start?

I want to build my own Solar Hot Water Heating system..Where do I start? - solar water heating

I went through the net to find information, or planning to build a house and to install the solar water heating on. Everything seems to come, through advertising and links is asking me money to send these systems. Can someone me a place where I can find plans and detailed requirements and information about each of these systems. I do not really pay .... So I'm not mistaken ...

Any information or advice greatly appreciated.