Wire gauge confusion (AC grid tie vs. Panel feeder)

[longcreekridge]

A few months back I installed a 6000xp and wallmount battery inside a new barn/workshop, feeding a 100amp panel. Hoping to move onto phase 2, which is to get a critical loads sub panel inside the house running off the same equipment. Seriously considering adding a second 6000xp for more overhead. Not planning to do net metering or any grid back feed. House is grid tied, 200 amp service. Primary goal was to run the shop entirely off solar. Secondary goal is to offset some of the power needs of the house. At the same time, I would like to tie the grid *into* the 6000xp(s) for grid backup if needed.

(See image for clarification. Neither the mobile home feed lines nor the 6 AWG grid feed to 6000xp are in place yet.)

Planning to run 2-2-2-4 mobile home feeder for the approximately 150' from inverter to house. My confusion/issue lies with the fact that (I believe) the 6000xp can't handle anything bigger than 6 AWG for the grid input. I believe the planned setup is fine provided I am running from the battery and/or solar. But assuming I ever max out the 6000w (or 12000w if using 2 6000xps) inside the house, and also assuming no sun/battery drained, and I am pulling all that from the grid, can that 6 AWG grid input handle all that juice?

Hope that made sense. In short, I'm trying to understand if/how I can feed a 2-2-2-4 run to the house, using a 6 gauge grid backup line.

 

[DIYrich]

6 awg is 55 amps max, 44 amps continous. 12,000 watts is 50 amps. If you stay under 10,000 watts continous, you are fine. If you need more than 10,000 watts continous, combine the two 6 awg wires to a 4 awg wire using a sub-panel, busbar or polaris connector.

 

[longcreekridge]

Thank you for the reply, and the helpful info. Much appreciated.