A have a setup consisting of a multi rs solar, cerbo and two pylontech us 5000 batteries.
The set is for an off grid installation running in dvcc mode.
Besides the two solar trackers in the rs, i want to install a few micro inverters on ac out.
In a test setup i installed an Enphase iq7 microverter on ac out. This micro inverter works fine but for some reason the production of the microverter is not visible in vrm dashboard and the frequency shifting has not started. The production of the iq7 is visible in Victron connect though, so it is working.
The result is that the iq7 keeps on creating energy even when the batteries are a100 procent full.
The frequency shifting should start at i think 98 ,percent soc.
For some reason the frequency shifting is not activated. So the iq7 is not stopped. Does anybody know why not ?
As i understood on the rs this does not have te be installed, it should just be there and work.
In advanced i can see the frequency had not been shifted. I can see that in Victron connect aswell.
Any suggestions?
Probably because the system does not know it is there.
It frequency shifts a fronius quite fine. But that is integrated.
You may need to get a grid meter for a pv meter or get crafty with node red and a contactor or something (half baked thoughts there).
I checked in advanced the frequency on ac out.
It was unchanged ( 50.00hz) . That was also what i could monitor on Victron connect
I understand frequent shifting does not work on on grid setups because you just cant change the grid frequency.
But in advanced i could see the micronverter created energy since there were negative loads.
I found some info on the energie meter VM-3P75CT
It is ready to go and involves no programming .
It can be on the running can network and defined as a pv inverter !
That should do the trick without software hassles.
When you are on-grid, then instead of frequency shift you(your Venus) need(s) to have ability to send control to Enphase iq7 for it to reduce feed-in. Or to use on/off PV inverter control by cutting AC to it when SOC is close to 100% to avoid false feed-in
Just to be sure: you’ve installed the PV-Inverter Assistent and configured it ? You will not see any production on VRM until you’ve got a dedicated enerymeter for that (or a pv inverter, which is supported either by victron directly or by a script).
On a multi rs it is not possible to install assistentes i think.
But by the book of the multi rs solar :
When external PV inverters are connected to the output of the inverter, excess solar energy is used to recharge the batteries.
Once the battery absorption voltage is reached, charge current will reduce by shifting the output frequency higher. This frequency
shift is automatic and does not require configuration on the Multi RS Solar, though the AC PV inverter may require additional
configuration. This feature is used for battery over charge protection and solar assist. It does not allow charging the battery from
an AC PV inverter to fully 100% State of Charge. To complete a full charge from solar, connect PV to the internal MPPT solar
And for some reason that ( the frequency shifting) does not work.
But i really think that installing an Victron energy meter (there is even a can model wich can act as pv inverter ) on the ac pv wil solve the problem.
Cutting AC to it?
Isn’t this mean that you also drop/disconnect the consumers/loads ?
Remember, microinverters are connected to AC-Out…
Or do you mean through some automation with some relays that will disconnect the microinverters from AC-Out?
Pretty sure Andrii means to cut AC connection of only the microinverter, so it can’t overcharge the batteries.
Perfect solution would of course be to integrate the micro inverter in the Venus ecosystem so the power can be gradually throttled up/down instead of hard cut on/off.
Thanks for the suggestions.
My system is not on but off grid.
Nevertheless switching the mico inverters on and of depending on soc for instance could be a solution .
I might be able to use the ( reversed) start stop function of the generator to switch a relay that powers the inverters. This assistant appears to be preinstalled on the rs.
Hi Arie
To see production of Enphase iq7 in the VRM you need to install energy meter to the connection point of this micro inverter and assign it as PV meter with is located on AC out of multi rs. As well as meter Shelly smart plug s or Shelly 1pm can be used with a driver for cerbo. As multi rs cannot recognise additional source of energy on AC out. In case of higher production of the micro inverter then load this energy will be used by multi rs but you will see it only by multi rs will start changing battery from ac.
