The battery will always try to keep the voltage going into it, at the voltage level of the battery itself. The battery will be sitting at 13 volts, and your Wind/Solar power will be 22 volts open circuit. As soon as you connect your open circuit Wind/Solar power to the battery, POOF ,everything is now running at 13 volts. It pretty much doesn't matter what voltage you want to charge the battery with, Your genny may be making 65 volts open, but connect it to the battery and then everything is at the battery voltage.
What happens to all that extra voltage? It's converted to amps and that is where you start to worry about your stator burning up. Once your wind genny reaches Cut-In (battery voltage) the measured volts will be the battery voltage which should be increasing slowly as it is charging. As your genny speeds up past cut-in the voltage doesn't increase, but the amps do. Under most circumstances you don't have to worry about the voltage of the device you are connecting to the battery, your worry will be with the ability of the charging device to deliver the Amps without burning up.
When Charging a battery try to keep the current going in to less then 10% of the capacity of the battery. For Example: a 100 amphour battery should be charging at 10 amps or less.
A LVD (Low Voltage Disconnect) isn't really necessary as long as you can keep checking your voltage yourself and just turn the power off to your appliances when you see the voltage getting too low.
It is possible to do without the Dump Load Controller too, but it's a little bit more tricky. You just keep up with your battery voltage and if you think it's getting too high, turn on some lights or any other load to use up the power before it can overcharge the battery. If your system is unattended at all, you will need some kind of Dump Controller to keep from cooking your battery.
