Using the EM530 USA split phase and Cerbo GX reboots/update —> revert to 3 phase

[mikey995 (Mike)]

I’m using the EM-530 to prevent backfeed in a 2x multiplus ii 48/5kVa split phase setup and it’s been working fine. The problem is that if the cerbo reboots or updates software then it sets the EM-530 to 3 phase which adds a nuisance phase 3 to the display.

To correct this I have to go to the main load center and manually reset the EM-530 to 2 phase and then reload the display.

A proposed change is to add a “Split Phase” option to this menu for the USA customers and keep the EM-530 set to 2 phase which would eliminate the nuisance phase showing and also the reset effort that follows.

Thanks for a great product,

Mike McCann

[ricardocello (Rick)]

Sadly, it has been like this for as long as I can remember.

The VenusOS code always sends a “reset to three-phase mode” message to the EM530 regardless of the configuration.

Because it was so annoying, I went as far as putting a man-in-the-middle processor to snip out that Modbus message so the EM530 wouldn’t see the message. But I stopped doing that when I gave up on running the ESS assistant here in the US.