Mixing Panels

[umaguma]

I have 3 panels rated at Voc 21.56 Isc 8.2 and one panel rated at Voc 43.3 Isc 5.23.

Can I wire them in series and put them through an Outback MX60 to charge a 24v bank.

Wire run is 150ft what size wire and what would be the likely output in amps.

[dbcollen]

yes, you can but you will be throwing away half of your power, because in series your panels will be limited by the ones with the lowest Isc. your 3 150 watt 12 volt panels will be limited by your 180 watt 24 volt panel. your Voc will be 108, but amps will be around 5, for 83*5= 415 watts instead of 630 watts

Vmp will be around 83 volts

150 ft run would require # 8 wire to have 2% loss

running just the 3 150 watt panels in series you would have 450 watts, voc 64.5V Isc 8.2A, Vmp around 50 volts and run #6 wire and have your 180 watt panel to use elsewhere.

Dustin

Mad River Wind and Hydro

[umaguma]

Thanks that's just what I will do.