I have 400A service with 2 x 200A panels and solar.
I have one Sense on 200A panel 1 with solar.
I have a second Sense on 200A panel far away from panel 1.
Sense does not support 200A + 200A + solar, thus I have two sense units.
Sense does not support multiple sense units on the same account, thus I have 2 sense accounts.
Per advice in this thread:
I connected the CT’s of sense with solar to the 400A side of the service panel.
This will let me use a singe sense, to monitor 400A service and solar.
After I moved the CT, keeping current direction the same (sticker side to supply), the sense behaved “weirdly”.
My usage was reported at almost double my normal load, power cycling the sense did not correct.
I used the mobile app and reset the data, the app asked me to power solar down and up, like I did when I first installed.
Problem is still that solar and usage are not correctly calculated.
If e.g. solar is producing 2KW and 1KW (-500W + -500W) is fed back to the utility, the usage is 1KW (2KW - 1KW), but the web app and mobile app reports usage as 0W, wrong, while the monitor page on the web app shows solar: 1KW/1KW, Mains:-500W/-500W.
I contacted support, but they take a) three days to respond and b) are not helpful, not reading my linked forum post and not reading my email, just pointing me to the supported panel support configuration page.
Here is a picture demonstrating the issue:
A few questions:
- My understanding is that L1/L2 voltage and L1/L2 current is auto detected, i.e. swapping the CT’s does not have an impact. Is this correct?
- The CT direction is not important, just that CT1 and CT2 face the same direction. Is this correct?
- Is my assessment that negative current means solar feeds the grid, and positive current means the grid feeds the house, correct?
Any ideas, or is a factory reset a better choice?