Wire Gauge Required Question
For some reason I just can't understand the various wire gauge tables, and I have tried to, so I am hoping somebody will take pity and do all the work! :) One table that I can follow says that for...
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To be sure, I mean the array is 30 ft away from the controller for this question, so 30 ft of pos wire and 30 ft of neg wire carrying 16 amps from array to controller. (unless it is 8 amps)
IE the 24v (36v actual) panel has an Isc of 8.x amps, but with MPPT it will do about 16a. Or is that 16a only from the controller to battery and it is 8 amps array to controller? I know you can use thinner wire with 24v than with 12v, but is that because the amps are half on the array side of the controller? Ie 8a instead of the 16a seen at the battery?
I have no idea what the appropriate amount of voltage drop would be to not "lose" any amps in MPPT. I don't understand percentages in term of voltage drop either. 2% of what? The voltage diff array to controller is always Vmp in MPPT but it varies controller to battery as battery voltage rises in 12v ??. Gads.
IE the 24v (36v actual) panel has an Isc of 8.x amps, but with MPPT it will do about 16a. Or is that 16a only from the controller to battery and it is 8 amps array to controller? I know you can use thinner wire with 24v than with 12v, but is that because the amps are half on the array side of the controller? Ie 8a instead of the 16a seen at the battery?
I have no idea what the appropriate amount of voltage drop would be to not "lose" any amps in MPPT. I don't understand percentages in term of voltage drop either. 2% of what? The voltage diff array to controller is always Vmp in MPPT but it varies controller to battery as battery voltage rises in 12v ??. Gads.
