I too took a look at the link, and I'm wondering what kind of controller you are actually looking for?
Do you already have Solar or Wind?
Solar controllers to not normally play nice with wind.
If you have a setup and are looking for a way to get your feet wet and not brake the bank doing so, and are looking for a simple inexpensive controller have a look at GHURD's diversion controller.
It's well tested and openly tested by several people on this forum.
An added plus it's less than 1/2 the $$ of the ones on the link.
To see the unit and get a bit more info the link is ghurd.info.
He's a moderator on this forum and usually answers posts PMs of emails quickly.