400A --> 2 x 200A panels with Emergency D/Cs... Grounding strategy

[paullmullen]

I am installing a new residential service. 400A service to an "all electric" house. (No gas heat, two electric vehicles.) Wisconsin is on the 2017 version of NEC. Regardless, we will put emergency disconnects outside because it's just a good idea. I've shown a 1-line diagram of what we're planning. A picture is easier than a paragraph.
My question is about the practical physical implementation of the green connections. There is no Ufer ground and the water connection is PVC, so ground rods it is. I plan a bare copper GEC from each 200 disconnect to the first ground rod and then a single GEC from Rod 1 to Rod 2. Any reason to do it another way? (I don't see the point of a second connection between the ground rods, for instance.)

 

[infinity]

I plan a bare copper GEC from each 200 disconnect to the first ground rod and then a single GEC from Rod 1 to Rod 2. Any reason to do it another way?

As long as there all connected together you can do it just about anyway that you please. You could go Disconnect>GEC>ROD>(bonding jumper)>ROD>GEC>Disconnect. Or you could split bolt to the GEC with a bonding jumper just as you've depicted in your graphic.