[Reason077]

> "(I am not familiar how long it takes from ISO signal to inverter command)."

The grid frequency itself functions as a signal: a deviation below 50/60 Hz indicates support is needed, and a deviation above means curtailment is needed (or load added).

Instant frequency-response assets such as batteries typically monitor the frequency independently and respond as required. They don't need to wait for explicit signals from the ISO.

[toomuchtodo]

True! But this signal is typically locally monitored and responded to by individual assets ("frequency response" ancillary services). That is distinct from a grid operator, ISO, whomever is orchestrating grid health to call on generating units due to a supply crunch. Tesla Megapacks can respond within milliseconds to frequency and voltage sags (when configured to provide these services), but Autobidder is what orchestrates and pushes out overarching power control strategy to individual assets (for example) [1] [2] [3].

[1] https://www.tesla.com/support/energy/tesla-software/autobidd...

[2] https://www.tesla.com/support/energy/tesla-software

[3] https://electrek.co/2023/09/15/tesla-autobidder-product-330-...