Suppose I have four panels with the following statistics:

- Module watts STC 380 Watts
- Max power voltage (Vmpp) 40.00 Volts
- Max power current (Impp) 9.50 Amps
- Open circuit voltage (Voc) 47.80 Volts
- Short circuit current (Isc) 10.01 Amps
- Max system voltage 1500.00 Volts
- Series fuse rating 30 Amps
- Temp coefficient (Pmpp) -0.37%
- Temp coefficient (Voc) -0.29%

Now, I want to buy a controller for them. If my battery bank is 12v, then my current out would be about 126v. Does that come into play? If it can't handle that output, will it ruin any of the components to run this or will it just limit my power output? How can I determine the current output for a controller?

I am running a 30w and 12/24v appliance so I don't need even close to all the power from the panels and am fine losing a huge chunk of it for the time being. I would then upgrade my battery bank in the not-so-distant future when it became important. I just don't want to damage any components in the interim.

I also have a second two-part question. First, do I connect my appliance(s) directly to the charge controller? If so, can I choose the output voltage? Suppose I have a 36v battery bank. Can I then choose to output 12v anyway from the controller for my appliance?