Adding Emporia Vue to main panel

[WorldwideDave]

I have Emporia Vue 3 in my subpanel now for 8 days. I love it. It is time to add it to the main panel if possible before I replace the panel. So I know I want to buy one with 16 CTs in case I replace my smaller panel with a new one with more places, but I do have a few questions about the installation.

Downstairs in the subpanel, I have the two large CTs connected to the incoming 100 AMP conductors, and the 16 others connected to the loads there.

In the main panel, I have 10 spots. It is a very old 100 Amp panel from 1960s we believe. CH brand.

2 spots (240V, double pole, 100 AMP) are in use for the main incoming conductors from the meter. So the conductors are always live - no separate breaker.
2 spots (240V, double pole, 100 AMP) are for the 100 AMP going to the downstairs subpanel
2 spots (240V, double pole, 50 AMP) are for the pool equipment 240 pump
1 spot (120V, single pole, 15 AMP) GFCI for pool light
1 spot (120V, single pole, 20 AMP) for indoor & outdoor lights
1 spot (120V, single pole, 20 AMP) for indoor receptacles
1 spot (120V, single pole, 20 AMP) for outdoor receptacles

I know I'll need the large CTs on the 2 spots coming in from the meter.
I think I can avoid putting another set of large CTs on the 100 AMPS going to the downstairs subpanel - is this correct?
I can use smaller CTs on the pool equipment, pool light, and remaining 20 AMP breakers.
So 2 large CTs and 6 small CTs is all I should need in that panel.
Am I correct?
I am concerned about wiring up the Emporia Vue. In the subpanel, I had a lot of new wires. I am afraid that in the main panel, I will have the old original wires from the 1930s or even 1960s, like I have seen throughout the property. Those wires do NOT like to be touched - their coating around them falls off with a strong breeze. I may get lucky and find out that it was rewired in the 1960s or 1970s. I've never had the cover off because I'm terrified due to the cover being painted/stuck in place most likely, and more importantly - no main breaker to kill power to the load center from the attached meter. I will likely pay electrician for that panel.
Other than wiring being old, anyone see any issues with the plan I proposed above? Any other suggestions?
Once installed, I will most likely post questions on how to set it up in the app - how to have 2 emporia vue 3 show up in the app under one combined house if possible.

 

[Durk_2007]

Yes it will work that way. Once you bring the 2nd emporium online you can nest the first one under the second in the app. This way it will subtract the 1# power from the balance of #2

 

[WorldwideDave]

Yes it will work that way. Once you bring the 2nd emporium online you can nest the first one under the second in the app. This way it will subtract the 1# power from the balance of #2

I don’t understand your screenshot. Is sunnyboy inverter actually a panel in this example?

 

[Durk_2007]

"Shop" is the main panel of the property. Sunnyboy is a circuit in that panel for my inverter. "House" and any circuit that is below it is the second Emporia

 

[Durk_2007]

All I was trying to show is that say your using 5000w on mains. The vue circuits in "shop" is only 2000w it will show 3000 at the bottom as "balance".
With the second vue at another panel using 2500w it can break it down by circuit and only show 500w as "balance"

 

[WorldwideDave]

Your example confused me even more. Your balance was zero in your screenshot as well.

 

[Durk_2007]

It is kind of confusing at first. Once you see it all together for a day or 2 it makes sense. The balance is 0.297kwh for the hour that I screenshot. The water heater for my heated floor are 0.

 

[Durk_2007]

 

[WorldwideDave]

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So that I understand correctly, you must have a panel in your shop where your grid comes in. On that panel, you have some bigger connections, which are Connected to The larger cts. The larger ones are connected to the conductors coming from the grid, and the conductors coming from your solar inverter. There is also large conductors, leaving that panel and going over to a sub panel that you have named house. but on this shop panel, which you have labeled main in your photos, You are also running a floor heater and something called the Hydro office. How am I doing so far?
well, the usage of the Hydro office is low and the floor heater is zero, everything from the sub panel is nested under what you call the main panel because the sub panels feeds are coming from the main panel and it aggregates the total load of the subpanel underneath the CT of the main panel. am I understanding this correctly?
I assume that when there were two panels you could simply group them individually so for example, in your set up, you would see the main grid in and grid out and the floor heater and the Hydro office and all the little things like the fridge and well pump, all individually listed, not broken out or nested off to the side.

 

[WorldwideDave]

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To further add to my confusion, in your screenshots, you have a balance for your main, and a balance for your sub panel. I really don’t know what to make of that. For example, your main appears to have a 35% balance. When I look at screenshots of my set up, I have aTo further add to my confusion, in your screenshots, you have a balance for your main, and a balance for your sub panel. I really don’t know what to make of that. For example, you’re main appears to have a 35% balance. When I look at screenshots of my set up, I have a 2% balance when I look at the day view like you are

 

[Durk_2007]

So that I understand correctly, you must have a panel in your shop where your grid comes in. On that panel, you have some bigger connections, which are Connected to The larger cts. The larger ones are connected to the conductors coming from the grid, and the conductors coming from your solar inverter. There is also large conductors, leaving that panel and going over to a sub panel that you have named house. but on this shop panel, which you have labeled main in your photos, You are also running a floor heater and something called the Hydro office. How am I doing so far?
well, the usage of the Hydro office is low and the floor heater is zero, everything from the sub panel is nested under what you call the main panel because the sub panels feeds are coming from the main panel and it aggregates the total load of the subpanel underneath the CT of the main panel. am I understanding this correctly?
I assume that when there were two panels you could simply group them individually so for example, in your set up, you would see the main grid in and grid out and the floor heater and the Hydro office and all the little things like the fridge and well pump, all individually listed, not broken out or nested off to the side.

This is all correct. Except the inverter is a small CT and labeled as a production circuit in the settings

 

[Durk_2007]

I have several circuits in each panel that doesn't have CTs that is the balance. It takes big CTs - little CTs = balance

 

[WorldwideDave]

So when I have 2% balance and I have cts on everything and have zero solar connected to any panels at that property what is that telling me?

 

[Durk_2007]

How many watts is that 2%? I'd guess it's either a rounding error/consumption of the unit or you have a high resistance draw in that panel somewhere.

 

[Durk_2007]

Do you have any of 240v circuits? Did you use 2 CTs for them or use 1CT with a multiplier ?

 

[WorldwideDave]

Yes have 3 double pole 240 breakers. Wall oven, dryer, and a/c. Used 2 cts per 240 breaker. The box is full.