H3/AC3 and DRM0

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kozobera
Posts: 1
Joined: Sat Apr 15, 2023 10:03 pm

Hi all,

can you clarify to me what the DRM0 function (described in the user manual https://www.fox-ess.com/wp-content/uplo ... Manual.pdf) does exactly? For what is it used?

Thank you.

David
ljalves
Posts: 5
Joined: Fri Sep 01, 2023 8:39 pm

I was wondering the same thing (different inverter, S series G2) and googling around I think it's more or less this:
(please anyone correct any mistake)

Some countries (like Australia) somehow control this modes by powerline comms and they call it DRM.
DRM = Demand Response Mode
DRM0 = DRM mode 0 (there are more modes).

Quoting some doc talking about inverters:
"[...] One of these requirements is demand response mode for zero export (DRM 0), which reduces export to grid to zero upon
command from the utility".


Putting it all together, I believe that if you enable DRM0 in the settings (and you have a CT clamp/meter connected) then when this input pin is shorted to GND the inverter will not export any power.
ljalves
Posts: 5
Joined: Fri Sep 01, 2023 8:39 pm

Also found:
Image
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