Grid Setpoint not working accurately in Venus OS 3.64 (works fine in 3.63)

DIY
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1

Hello,

After upgrading from Venus OS v3.63 to v3.64, I’ve noticed a clear issue with Grid Setpoint accuracy. My system no longer exports the configured power to the grid precisely.

:warning: Problem:

  • When setting a Grid Setpoint (e.g. -2000 W), the system only exports ~1000–1500 W, consistently below target.
  • This behavior was not present in v3.63, where Grid Setpoint was accurate within ~50 W.
  • I confirmed this by downgrading back to 3.63, where the issue disappears.

:magnifying_glass_tilted_left: Additional info:

  • The system uses ESS with battery and solar PV.
  • There are no other limits active (SoC min/max, charge current limits, etc.).
  • Tested with different setpoint values (from -200 W to -3000 W).
  • The discrepancy remains constant and appears to be a PID regulation issue or command delay.
  • Changelog for v3.64 doesn’t mention any related changes.

:white_check_mark: Suggestion:

Please verify if any changes in 3.64 affected PID tuning or export behavior. A regression test against 3.63 may reveal what caused this deviation.

Happy to provide logs or testing results if needed.

Thank you!