trying to figure gauge of wire to use from Inverter to Main Panel

[PoPoShoo]

I posted this earlier, but will just start over with some added facts

Our system will be a 13.2 KW grid tie, using a Fronius 11.4 Inverter. The panels will be mounted on a shed. The single phase AC 220v run from the Inverter to the distribution box will be 275 feet (100' inside the shed, then another 175 feet underground to dist. box). This will be Aluminum wiring

Again, using a Fronius Primo 11.4kw Inverter, specs are below:

INPUT DATA​

Number of MPPT	2
Recommended PV Power (kWp)	9,1 - 13,7 kW
Max. usable input current	33,0 / 18,0 A
Max. usable input current total (MPPT1 + MPPT2)	51 A
Max. array short circuit current (1.5 * Imax)	49,5 / 27 A
Nominal input voltage	420 V
Operating voltage range	80 - 1000 V
MPP Voltage Range	240 - 480 V
Max. input voltage (Udc max)	1000 V

OUTPUT DATA​

Max. output power 240 V	11400 VA
Max. output power 208 V	11400 VA
Output configuration	1~ NPE 208 / 240 V
Frequency range	45 - 66 Hz
Nominal operating frequency	60 Hz
Total harmonic distortion	< 2,5 %
Power factor range	0 - 1 ind,/cap,
Max. continuous output current 240 V	47,5 A
Max. continuous output current 208 V	54,8 A
OCPD/AC breaker size 208 V	70 A
Max. efficiency	97,9 %
CEC efficiency 240 V	96,5 %

I will be using 4 - 8 panel arrays (400w Heliene). The Spec for each Panel is below:

Peak rated Power: 400w
Max Power Voltage: 40.70
Max Power Amps: 9.83
Open Circuit Voltage: 49.58
Short Circuit Current: 10.35
Module Efficiency %: 20.13



So, trying to calculate the wire gauge size for a 275' run from Inverter to Main Breaker box. Which of the above data would I add to the online calculator to determine gauge needed?

 

[Ozark Tinkering]

Here's a really nifty tool to use and if you scroll down on the page you will see the formula used to calculate voltage drop.

Voltage Drop Calculator

The purpose of this calculator is to determine voltage drop, percent voltage drop, and voltage at load based on the length of the circuit.

wiresizecalculator.net

 

[sunshine_eggo]

Since you appear to be talking about running the AC wires from the inverter to your panel, none of the PV data applies.

Per the AC output data: 240V and 47.5A:

2awg Aluminum gets you under 3%:

Voltage Drop Calculator

This free voltage drop calculator estimates the voltage drop of an electrical circuit based on the wire size, distance, and anticipated load current.

www.calculator.net