txsjedi
New Member
Have a question, I have 4 165w panels, 22.46v. If I set up a 24v array (2 each at 12v to get 24v from 4) how do I determine voltage for the right mppt charger?
You need to look at the maximum open circuit voltage your panels can deliver and compare that to the maximum your MPPT can handle. So if the 22.46V is that one, you have an array with an Voc of 44.92V when you put two strings (series 2 panels) in parallel - your MPPT needs to be able to handle that, plus some safety margin.
Edit: since your battery is 12V, this is a 12V system, not 24V.
Yes, you can even do a 150V array with a 12V battery. The MPPT is responsible for converting the solar side to the correct battery. You only have to make sure that your MPPT can handle the max. open circuit voltage of your array and the maximum short circuit current of your array. Based on that you make the decision.