Configuration: Multiplus II running ESS.
Problem: I wand to connect a generator. I do this by switching the AC-IN of the multi from grid to generator using a A-0-B-Switch.
This works fine.
But the genetaror is generating 53Hz. So the multi is refusing to connect since i use a european grid code to be able to send access PV to the grid.
Since Multi allways follows the grid when traying to connect to the grid is there any problem to change maximum frequency range under Grid → grid controll codes → normal connect (and reconnect) to accept a frequancy between let say 48 and 53 hz?
I know that that makes me non conformative to grid-code, but also i do not see any real problem because multi allways follws the grid (it will never try to connect to grid (of generator whitch he then ‘sees’ as grid) if it can not sync the frequency.
Result would then be that my generator (probably) is accepted.
Alternative is to switch grid to none every time i use the generator (because then is accepts the generator), but that is a hassle.
Does anyone know if i will blow up my multi in doing so?
When you switch to the generator, also change the AC input type to generator and see if that allows the Multi to accept the generator. You’d want to do this anyway since you don’t want the Multi to attempt to feed energy into the generator!
If these helps, check out my GuiMods package which includes support for an external transfer switch. A new digital input type for external transfer switch is fed from a dry contact on the transfer switch to tell the GX device which source is active. It changes the input type from grid to generator and also a couple of the other parameters related to the AC input type and generator.
Hee thanks, did not expect an answer an such a specific question.
If you mean changing it in the cerbo menu, i have tried that. Switching it to generator and gave it ampel time (12 minutes!). It still refused because of wrong frequency. (The voltage is ok, i can check that easely. For the frequency i have to rely on the numbers given by the multi).
You did answer another question i placed here though: In short: “if all PV is connected to DC will it try to feed energy into my generator, or is the multi/cerbo smart enough to stop backfeeding into the ‘grid’ (generator) when i set the input to generator”.
So what else? Since switching input to generator in the cerbo didn’t do enything, should i start playing with the grid settings?
I rely don’t want to do that, because i simply am not 100% sure nothing will break. Everthough i can not emagine how because multi will allways follow grid.
I am surely open for advice here.
Thanks.