According to the pdf manual, the inverter and charger are disabled when Pass Through mode is selected, but.. the battery is still charged with solar energy! not what I expected or what I want.
With very little solar energy in the winter, the battery is more decharged then charged and become depleted too often.
(Doorvoer = pass through)
57% soc is not correct, it’s 33% according to the Smart Shunt
Any ideas?
I also have a Multi RS and I am curious why you feel that way…
So in passthrough, no current will be drawn from the battery (inverter) or put there from grid (charger).
But why is bad if the battery is kept charged by any small available solar power?
What I want is that all available PV power goes in ac load or the grid, the battery shouldn’t be charged or decharged, just doing nothing/ standby.
Right now I don’t trust both batteries BMS, I want to be at the batteries when they are charged, especially when they reach 100% soc.
Then maybe you should go with the Multi RS set to ON and Keep batteries charged.
Once they are getting to 100%, any solar will go to loads or grid and the batteries will be discharged only when no solar and no grid.
I may not have been clear, my question is why the Multi RS in Pass Through mode charges the battery with solar energy, while the manual states that the charger and inverter are switched off?
Because of the hardware layout.
The main advantage of the Multi RS is the fact that it has that power nexus that is the high voltage DC bus.
That is the place where all the components are adding or extracting the energy.
There are two chargers: grid charger and solar charger.
The grid charger is off, according with the manual.
The grid charger and inverter are the same entity from hardware point of view.
The difference is the direction of current flow, which can be only one at some point in time.
And this is OFF during pass-through.
Thanks that’s explain it exactly.
The RS is complex as it can control 4 power streams: AC grid, external pv inverter, mppt pv power and DC power.
To achieve your goal of not using your solar to charge your battery you are able to turn off the mppt trackers in your MultiRS settings additional to selecting passthrough mode. This will however let your solar energy go to waste, not to the grid.
Setting DVCC allowed charge current to 0 in the Cerbo will prevent the MultiRS from charging your batteries without having to resort to passthrough mode.
I actually use passthrough mode to ensure that DC-connected solar is going to my battery, while AC-connected solar (Solaredge inverter) is sent directly to the grid.
Yes dvcc, I must try that function and see what it will do exactly.
I must yet to install the em375 power meter and two special switches in the fuse box, then I will do an re-install of the Multi RS and hope everything will work OK.
