Since my PV’s are flowing in opposite directions, am I crazy in thinking that the following would work? CT on phase 1 of PVA and phase 2 of PVB and the other CT on phase 1 of PVB and phase 2 PVA.
phase 1 & phase 2 are 180 degrees out of sync.
Will not work
2 Likes
I probably used the wrong terminology in my last comment but I was able to aggregate both PV systems by placing the CT’s on the following wires:
Everything seems to be pretty accurate.
For my understanding:
there colored bars (green and purple) have only 1 arrow on them
But they end on both sides on the line on a wire that is connected to your 2 inverters.
Are you implying you bundled the red wire on the left breaker together with the black wire of the breaker on the right side in one CT and vice versa (black wire on the left with the red wire on the right) in the other CT and that fixed your reading?
Do I understand that right ?
1 Like
What you implied is spot on to what I did and now my readings are correct.
1 Like
You are a genius… they are 180 degrees out of phase but you put them in “the wrong way” (pointing opposite side to/from the breaker) that adds the signal.
Never thought of that…
amazing …
2 Likes
I also have two Solar PV on a dedicate DP breaker. My challenge is one is in the main panel and the other is in a sub panel…Any ideas how to monitor both? Or will it require a new sense to be located in the sub panel if I want to monitor both.
How far apart are they ? We have seen at least 1-2 users splice together 2 CTs in parallel to pull data from 2 different solar arrays that have 2 different feed-in points. The challenge you will find is that Sense’s power arithmetic for Solar is fixed for only a couple of configurations (mains plus single solar feed-in breaker or mains plus solar feed-in via supply-side taps). You can put a second Sense with Solar on the subpanel but you won’t get the results you most likely want from the Sense on your main panel - Solar data for the array connected to your subpanel won’t make it to your main panel. Both main panel Total Usage and main panel Solar will be missing subpanel solar feed-in component.
They are close….see picture below. 200A main Service with two sub panels - 100Amp on the right, 60Amp on the left with critical load.
I have put the CT’s for consumption on the main/center and the first solar PV…only on bottom right of main - you can see the Solar breaker there.
The other breaker for the second PV is bottom left of the 60A panel/left with critical loads.
I have noticed when the Solar is really going - creating approximately 9kw my consumption on the meter is negative for solar and 0 on the top right devices icon.
The sense has been useful to understand some strange surges I was getting - allowing me to isolate the loads responsible by flipping some breakers. I have only had it hooked up for 2 days
Thanks for the help.
GT
Wow ! Lots of panels all together - but good explanation.
Can understand why you might want to have a solar array feeding into the critical load - does that solar also include a battery ? Given the closeness of all panels, one other thing you might want to consider is putting a solar CT around both solar feed-ins for each leg/phase somewhere upstream from your central panels ? You don’t have to combine them, just get a single Solar CT around each pair. You might need to trace carefully to match up the legs, and you’ll need to match polarities, but that would give you a main Sense that sees all correctly.
I didn’t set it up….was here when we came.
Yes there is also battery backup on the critical loads.
I have not seen any place where I can do that as most of the wires are behind the wall and I am just learning / dont want to get electrocuted…. 
See below.
2 Likes
This topic was automatically closed 365 days after the last reply. New replies are no longer allowed.