18kpv pv interactive 2 pole disconnect

[TheFlumph]

Can someone help me to understand this? This EG4 diagram says I need a 2 pole disconnect between my main panel and inverter.
So cant I just shut off the connection either through the 70 amp breaker in the main panel, or I can just do the inverter shutdown? Why do I need a switch between them? And if I do, what size do I need? 200a switches are over a $1000 and thats absurd. Having to pay for a new transformer that I wont own is already screwing my budget.

I also have a 200a switch at my meter, and on the main panel.

thanks!

 

[timselectric]

The requirement is for firefighters.
If you're 70a breaker in the main panel is outside. Then you have it covered. If not, then you need a 100a disconnect.

 

[Zapper77]

The requirement is for firefighters.
If you're 70a breaker in the main panel is outside. Then you have it covered. If not, then you need a 100a disconnect.

Almost seems redundant with the way anti islanding works.

Pop the meter and hit the RSD. Unless I'm missing something.

 

[timselectric]

Almost seems redundant with the way anti islanding works.

Pop the meter and hit the RSD. Unless I'm missing something.

I agree completely.
But some AHJ's don't know any better.

 

[HighTechLab]

I agree completely.
But some AHJ's don't know any better.

Better yet, firefighters, are the ones don't know any better.

 

[TheFlumph]

The requirement is for firefighters.
If you're 70a breaker in the main panel is outside. Then you have it covered. If not, then you need a 100a disconnect.

My main panel and inverter is inside in the basement.
So I need to run from the panel to an outside 100a switch, and then back inside to the inverter?