Admittedly, I don’t really know exactly how the Sense hardware works. Though, I think that you propose is closer to what I currently have, 3 does seem like it would be more like ALL incoming power to the house, regardless of source.
Heard back from Sense support, they offered two suggestions
Option A: For each inverter system, there should be a feed for phase A and a feed for phase B of the panel. Group the A feeds from each system and place a solar sensor around them. Do the same for the B feeds with the other solar sensor. (See the illustration below:)
Doing this allows for Sense to monitor and isolate all of the incoming solar power so that it does not affect the usage readings. It is important that the sensors can remain fully closed around both sets.
Option B: Alternatively, if your multiple solar systems happen to feed into one subpanel, you may be able to account for these in a simpler way. You may consider installing the solar sensors onto the leads for that subpanel to capture all of the solar circuits feeding in at that point. See an example of that below:
That is a nothing saying answer.
They clearly did not understand your question.
You asked them where to put the CT’s.
They came back with an answer how to install the CT’s.
This could be a lack of knowledge though.
I can’t give much more feedback except to say that you won’t get a full picture of energy flows with 3 sources (from grid, battery, solar) and 3 “loads” (house, battery, to grid), with just two pairs of CTs - you need 3 for a full picture. Long discussion of tradeoffs in this posting:
My 2c is that since your Neurio (formerly a Sense competitor, but gave up on detection) will be on to main and solar feed, you’ll want the Sense on to main and Backup feeds.