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Big discrepancy between Powerwall data with SCE usage data

I have a 10KW solar system and installed 4 Powerwalls to pair with the solar about one month ago.
On my Tesla app, I can see the Net Grid use is negative on most days. However, in my SCE account, the daily usage chart shows I'm using a lot of electricity on most of the days. Especially on peak hours, many days show I used few kWh electricity while the Tesla app shows I use all the electricity from the batteries during peak hours and there is some solar output feed to the grid as well.
Does anyone have an idea why this is happening?
 
I have a 10KW solar system and installed 4 Powerwalls to pair with the solar about one month ago.
On my Tesla app, I can see the Net Grid use is negative on most days. However, in my SCE account, the daily usage chart shows I'm using a lot of electricity on most of the days. Especially on peak hours, many days show I used few kWh electricity while the Tesla app shows I use all the electricity from the batteries during peak hours and there is some solar output feed to the grid as well.
Does anyone have an idea why this is happening?
Do you have partial or whole home backup?

If partial backup, are there Neurio CT meters capturing the non backup loads?
 
Do you have partial or whole home backup?

If partial backup, are there Neurio CT meters capturing the non backup loads?
I have the partial home backup, but the non-backup load only has a NEMA 14-50 plug which is not in use. All of the rest of my home loads are behind the Tesla gateway. Just looked at my meter a few moments ago, and it is showing -2.47 kw feeding to the grid and Tesla app shows solar is feeding 5 kw.
 

power.saver

Grid Specialist
Supporting Member
Mar 4, 2018
770
851
Arcadia, CA
I have the partial home backup, but the non-backup load only has a NEMA 14-50 plug which is not in use. All of the rest of my home loads are behind the Tesla gateway. Just looked at my meter a few moments ago, and it is showing -2.47 kw feeding to the grid and Tesla app shows solar is feeding 5 kw.
Do you have PTO from SCE yet?
 
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jjrandorin

Moderator, Model 3, Tesla Energy Forums
Moderator
Nov 28, 2018
16,727
22,080
Riverside Co. CA
I have a 10KW solar system and installed 4 Powerwalls to pair with the solar about one month ago.
On my Tesla app, I can see the Net Grid use is negative on most days. However, in my SCE account, the daily usage chart shows I'm using a lot of electricity on most of the days. Especially on peak hours, many days show I used few kWh electricity while the Tesla app shows I use all the electricity from the batteries during peak hours and there is some solar output feed to the grid as well.
Does anyone have an idea why this is happening?

You say you had "installed" a month ago, but you dont mention if you have permission to operate (PTO). The reason @power.saver asked this (and its important) is because if you dont have a compatible meter, you can actually be charged for energy you are generating instead of credited for it.

The other thing that tends to happen here is the CTs get installed incorrectly, but in this case it sounds like the tesla app is correctly capturing what is happening but SCE isnt.

So, do you have official PTO from the utility yet?
 
Looks like the CT's for the solar are not configured correctly. Call your installer back out.
The factor of two difference certainly makes it look like a CT configuration error. I would assume though it's an issue with whatever CT is measuring the grid. If it was a solar CT issue then it would just look like the home was consuming more than it actually was.
 

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