Tesla App Question: To the Grid counting in Home Usage?

[kardiff_kris]

So I've noticed every time we are pushing power to the grid, that power is counted in my home usage amount in the Tesla app. Is that how it is suppose to work? Every time I've pushed power to the grid my home usage # mirrors it?

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[getakey]

you need to overlay the solar production to see what is happening. In your first pic, you will see that the small peaks in home usage are small dips in sending to the grid. So they are not the same

 

[kardiff_kris]

I’m not sure I’m following? The moment the house switches from charging power walls to pushing to the grid the home usage jumps despite nothing nothing else being on from when it was charging the power walls. Nothing from a household load changed at the transition point from charging powerwalls to pushing to the grid. Clearly the amount being pushed to the grid is getting counted in the home usage, it perfectly mirrors every time. I'm assuming something is wired/configured wrong and this shouldn't happen?

I used some photo editing software, the average heigh of the pre-spike home usage plus the “to grid amount” make the home usage align perfectly.


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[BrettS]

Yeah, looks like your CT’s are either installed in the wrong location or misconfigured in the TEG. Call Tesla and they should be able to take care of it. They should be able to do it remotely if it’s just a misconfiguration.

 

[BrettS]

As I’m looking at it, I think the issue is that it’s only reporting half of the power going to the grid. If you look at the graph where it stops charging the powerwall and starts feeding into the grid it should be feeding about the same amount of power into the grid that it was using to charge the powerwall, but that suddenly halves.

Additionally, it doesn’t directly measure the amount of power going to your house, but instead it calculates it by adding the amount of power you’re taking from (or sending to) the grid to the amount of power your solar system is producing. However, if it only thinks that you are sending half the amount of power to the grid than you really are, then it will think that your house is using much more power than it really is.

There should be one CT on each leg of the power coming from the grid. It’s possible that one of the CT’s is missing or not working. That would cause you to only be reading about half the amount of power coming from/going to the grid.