Why is my powerwall discharging to the grid?

[sorka]

It is peak time but I didn't even think the TEG programming could dump power into the grid from the powerwall?

Also, I don't have PTO yet so I get very nervous whenever I see small discharges to the grid from time to time.

 

[getakey]

I've seeen that in the graphs for a brief moment. I don't think it is real

 

[jjrandorin]

I always thought it was just syncronization and such. It usually only happens for a beat or two. I am going to be VERY surprised if @sorka says "oh, no, it did that constantly for 10 straight minutes".

 

[Redhill_qik]

Discharging into the grid or charging from the grid? If it was discharging into the grid it should report -0.2kw instead of +0.2kw.

 

[gcsutton]

I always thought it was just syncronization and such. It usually only happens for a beat or two. I am going to be VERY surprised if @sorka says "oh, no, it did that constantly for 10 straight minutes".

Yes, it usually goes away in a few seconds

 

[bob_p]

There appears to be a delay built into the system when switching power between grid, solar, PW and house - and for brief moments until the switching is completed, the system can look like it's routing power incorrectly. And after a brief period, the system goes back to routing that makes sense.

These periods don't seem to be long enough to have any noticeable impact on grid power consumption.

 

[sorka]

Discharging into the grid or charging from the grid? If it was discharging into the grid it should report -0.2kw instead of +0.2kw.

The green dot was moving from the battery into the grid symbol.

Here's the graph for the same period. When I noticed it, I stared at it for a good 3 or 4 minutes before screen shotting it.

 

[BrettS]

The green dot was moving from the battery into the grid symbol.

Here's the graph for the same period. When I noticed it, I stared at it for a good 3 or 4 minutes before screen shotting it.

Like the others said, occasionally you will see a small amount of power coming from the grid to the powerwalls or from the powerwalls to the grid, but I think it’s just caused by rounding errors in the meter readings and/or short delays in the system response as the power demand of your house changes rapidly.

.2kW is really pretty negligible in the grand scheme of things. .2kW for even 10 minutes would only be 0.03 kWh. Given that a single powerwall can store 13.5kWh that represents 0.25% of the capacity of a single powerwall.