Flux;
Somehow everyone seems to think a charge controller is essential , it is only a luxury and you can work without it.
I have to chime in here and point out how true this is.
In fact, I had no controller for a good long time. Still don't, actually. I happen to have less coming in than I use so mostly I rely on my Outback inverter to kick on and charge my batteries if they get too low. If you need a turn key, set it and forget it system then you likely need a controller. I started in this as a hobby that combined several of my interests so I enjoy the hands on aspect of being a human charge controller. I add loads if I have extra power and remove them when I don't.
A tiny turbine feeding a couple of amps into a couple Trojan 105's, for instance, will not really need a controller if you use power regularly and you don't get days of high winds regularly.
Fact is, you will learn a lot more by monitoring the system manually and making decisions yourself than watching blinky lights on a black box.
Just an opinion and a real world analysis.
Very soon I hope to bring a couple 10 footers online and then my aging 900 AH, 24V bank will probably get a controller for those days when high incoming will require dumping power to keep things happy.
Just how I do it here, now.
Tom