Our company has executed over 300 Victron installations and just recently we are encountering a phenomenon where a few systems are not transferring seamlessly from a grid-connected state (ESS) over to the Inverter upon failure of the AC Grid supply.
Victron MultiPlus-II including MultiPlus-II's in parallel
Victron Cerbo GX
Carlo Gavazzi Grid Meter (ET112 or ET340)
Grid code: NRS-097-2-1 (South Africa)
LOM: Enabled (Type B)
Battery: Freedom Won LiTe Home or Pylontech
Firmware: 494, 495, 496, 497
The VRM advanced section does not detect a drop in the AC-Output voltage, however the phenomenon is clearly evident on site where the lights, WiFi router, TV and other plugs will drop and recover - having to reboot as a result of the duration of the power interruption.
We do not have the equipment to measure the output and confirm the transfer time but it is my understanding that the MultiPlus-II is supposed to transfer within 20ms to justify it's proposed UPS rating/capability?
Has anybody got any insights into this problem?
Thanks in advance.