Should I use 10 AWG wire or 8 AWG wire

[ogsolar]

I have a 12 volt grid tie array , 5-100 watt panels running parallel,that I need to move further out in my field. The panels will be about 120 ft from my grid tie inverter. Can I get away using 10AWG wire?

[Naptown]

No that will be too many amps in parallel assuming a 12v system
And PWM controller
Your best bet is to replace your controller with an MPPT controller then wire into 2 strings
Then perhaps ( although not calculated) you could use # 10
Currently you are looking ap probably a 1/0 copper wire to go that far

What panels and inverter are you using

[SunEagle]

I don't believe he is even talking about a charge controller for a battery system because he stated he has a "12 volt grid tie array".

Sounds like he just wants to run his 12volt panel directly to a "plug in" grid tie inverter which is why I won't provide any detail into wire size since they are illegal and dangerous.

[Naptown]

Why I asked for panel and inverter models