Hey all! Excited to be part of this community! I recently had solar installed at my home. At the same time, I had them install Sense w/ Solar for me. My solar system is currently pending inspection and is not active yet. As such, the solar feature hasn’t been calibrated yet. Despite that, I think the CT was placed incorrectly.
As I look at my app, I notice the solar production mimics consumption (yes, even during the night when no sun is out). In fact, the solar system is off. There should be zero production noted. With that said, I think the electrician placed the solar monitoring CT incorrectly.
I have included a few pictures for your review. I have also added some hand drawn labels to make it easier to follow the wires. IF you need the original, unedited photos – do let me know!
Current set up:
A1/A2 = Consumption CT
B1/B2 = Solar CT
Turn breakers off → Unclamp A1/A2 → Unclamp B1/B2 → Flip connectors at the Sense box (in other words, A1/A2 will now become my solar CT and B1/B2 will be my consumption CT) → Clamp A1/A2 to the solar line (labeled green) → Reclamp B1/B2 at the original position on the line labeled orange (see picture 3) → Flip breakers on.
There is very limited space in the first breaker box, having 2 sets of CTs will be tricky. Furthermore, that would involve me having to fish the CT through that small conduit entering the main breaker box. My plan would allow me to keep it easy and simple.
Follow up question:
(1) Will my plan work? Does it matter where the consumption CT is clamped? Does it matter if it’s at the blue or orange labeled lines (i.e. upstream/downtream of that very first breaker)? I just want to do this safely. Disclaimer: I am not an electrician – hoping someone can clarify.
(2) I was told the general convention w/ CT is — when attaching CT: one first has to attach connection to Sense and then clamp to the wire. When removing CT: one has to unclamp first, and then disconnect the connection. The reason for this is to avoid voltage spike. This forum mentions the CT provided have “integrated burden resistor.” Does that mean the general convention does not apply in this case and that there will be no voltage spike?
(3) What kind of connection do I have – is this a load side tap connection?
Thank you in advance for reading this! Any advice/suggestion would be appreciated!