Thank you for your patience with me as I figure all of this out and all your insight its been very helpful. I will do a manual test on the loads on the house tomorrow night. I have referenced the diagrams from previous in the post, though its still a little greek to me as I expand my knowledge base. I am still struggling to find someone locally for the electrical side I thought I had a source for a solar installer to help with the DER and final hookups but that has fallen through so I am likely to initially hook up the system offgrid initially and then complete the DER to grid tie the system so I can backfeed, that being said I want to make sure I have all the necessary requirements already in place for the backfeed capabilities so I do not have to drastically change the system when that time comes. the original solar installers did not leave me much room to work with as they put much of the equipment on both sides of my main panel. I will post a picture shortly of what I am referencing. my thoughts are like mentioned before in adding a 125a subpanel which I believe would give me the required backfeed capabilities overall but I may be misunderstanding something still.Yes that solar breaker clearly goes into the same position as a line side tap based on the wiring diagram you shared from the panel. We went over this (I think hedges and me) back on page 2 of this thread.