I understand that if you have a 100 amps main breaker, and a main panel bus bar rated 125Amps, you should be allowed to have up to 50 amps for the inverter breaker as per the calculation

1.2 x 125 amps = 150 amps minus 100amps main = 50 Amps

If that is correct my question is as follow.

My main breaker is outside the house all by itself. From it a line goes to the garage where the breaker panel is. That panel is where the Inverter breaker would go, and that panel has a bus bar rated 125 amps.

For the above calculation, which bus bar amp rating matters, the one outside where the Main 100 amps breaker is, or the one in the garage breaker panel?

Because if it is the outside, there is no label on that one.

Attached picture of the outside breaker and the inside panel.

Note:The breaker panel is full, but we will be creating a Critical load sub panel, so that will free space for the inverter breaker.

Thanks

1.2 x 125 amps = 150 amps minus 100amps main = 50 Amps

If that is correct my question is as follow.

My main breaker is outside the house all by itself. From it a line goes to the garage where the breaker panel is. That panel is where the Inverter breaker would go, and that panel has a bus bar rated 125 amps.

For the above calculation, which bus bar amp rating matters, the one outside where the Main 100 amps breaker is, or the one in the garage breaker panel?

Because if it is the outside, there is no label on that one.

Attached picture of the outside breaker and the inside panel.

Note:The breaker panel is full, but we will be creating a Critical load sub panel, so that will free space for the inverter breaker.

Thanks

## Comment