How long for Hz to get back to 60Hz when going off grid

[Steve2498]

After my PowerWall installation, going off grid caused the PowerWalls to shift Hz to ~65 shutting down the inverters regardless of the battery’s SOC. After nearly 2 months Tesla came back and said I needed to upgrade the firmware (for some reason it didn’t do it on its on its own).

After the upgrade, the frequency jumped to ~65Hz then SLOWLY Feathered down to 60.2 allowing the inverters to come back on line. The feathering took ~40 minutes. Is this normal behavior?

thanks

 

[miimura]

If the batteries were full, that seems about right. You should watch the kW load, %SOC, and the frequency over time after going off-grid.

 

[jboy210]

Slightly off-topic, but many of us have requested and had Tesla decrease the maximum frequency jump to 62.5 Hz or so. This is easier on all of the devices in your home. Modern electronics do not like to vary that far from the nominal 60 Hz and seem to tolerate the 62.5 Hz better. Especially devices like UPSes.

 

[dareed1]

See this thread, especially from about post #30 on. Short summary: recent behavior suggests that the frequency returns to 60Hz at about 80% state of charge.