Want to switch two garage (grid tied) circuits to my (offgrid) system. Any things to watch out for safety-wise?

[loac]

I have an offgrid solar system that I hardly use, which I fine because I made it for emergency power backup. However, I would like to switch two (grid tied) circuits over to my offgrid system. That way, I can use those circuits using solar power instead of paying for grid power.

The two circuits are simply 1. garage lighting and 2. garage (120v) outlets.

My plan is to install a new wallmounted load center like this one: Square D 30 amp load center with two 15 amp AC breakers and move the wires from the existing panel (which is fortunately right next to the PV system) to this new load center. I will feed this new load center from the AC terminals on my existing Giandell 3000watt inverter. The attached diagram and photo shows the existing PV system.

The existing (grid tied) panel has a 15 amp breaker for the lights circuit and a 20 amp circuit breaker for the receptacles circuit. So, my two new 15 amp circuits should be fine as far as protection of the existing cabling in the walls.

For the ground, I plan on running a wire from the existing circuit breaker ground to the new load center ground.

It all seems to make sense, however I wanted to post it here to see if I am missing anything safety-wise. Please let me know your thoughts.

 

[BentleyJ]

Grid-tie inverters cannot be connected to an Off-Grid inverter system. As long as the grid-tied solar system remains in the main panel and can feed into the grid, you can move as many LOAD circuits as you wish (or the inverter has capacity for) to the new panel.

 

[loac]

Thank you for the feedback, I really appreciate it.

 

[DIYrich]

200a fuse seems a little big for the 2 gauge wire

 

[loac]

200a fuse seems a little big for the 2 gauge wire

You are probably right. Someone brought up in a previous thread I posted that the BMS in the battery I have cuts off at 100A. Either way, I have 100A fuses on order and will replace the 200A fuse.