Hello,
after updating to 3.51 i noticed a strange phenomenon regarding the input current limit settings on the Venus OS UI.
On my three quattros i’ve set the function “override by remote” for the input current limit. It is actived for both inputs.
If i switch form grid to generator i can adjust the input current limit and it works as intended. If i now disconnect the generator and switch back to grid supply, BOTH input current limit settings for grid and generator are greyed out and cannot be changed anymore. Venus OS states that they are fixed in the system configuration.
The only way to fix it for now is to restart the cerbo gx. After a restart it works again properly as long as i do not perform a change of input. If i change to generator and back the issue manifests again.
System configuration is three-phase ESS with three Quattro II 48/5000 and a Cerbo GX.
With older firmware - i.e. 3.3.x or 3.4.x everything works fine. With 3.51, as well as 3.52 there are the discribed issues.
Does anybody else have this problem? Also - i run firmware v498 on my Quattro II. Didn´t change that because it worked before.
A really nice feature would be a “start charging” and “end charging” function in the UI under the generator section. But still start charging by default if a generator is being connected as it is behaving by now. The “end charging” in a way that it ramps back down the power within a few seconds before stopping.
Background:
If i connect to the generator, the Quattros sync and then slowly ramp up the power to the desired value. Now if i decide to stop charging let´s say at 80% then i at the moment (mis)use the input current limit to “tame down” the power a bit before i break the generator connection. When finished i restore the input current limit back to lets say 16A for the next run.
Without that i would have to open the contactor while charging at 10.000 watts power which altough working is not the most ideal way at least in my opinion.
In case im overlooking something and can´t see the forest for the trees i´m open for suggestions of course.
I have an update on this issue - i did a test today and found out that the settings for the input current limit do only appear to be “greyed out” if i disconnect the generator and connect back to the grid. Disconnecting AC 2 (Grid) and changeover to AC 1 (Gen.) does apparently not trigger the issue.
This time i charged the batteries all the way up into absorption and then disconnected the generator without fiddling around on the current limit. Makes no difference - settings get greyed out.
Also i found out another way to “reset” the problem. Manually triggering a re-detection of the VE.Bus system does also make the settings available again. Sorry - forgot to try this bevore - did only try the restart-way.
Perhaps this helps.
And my question again - could this have something to do with my (relatively) old firmware v498 on the quattros. Could a fireware update possibly solve this? I´m a bit hesitant because everything else works fine and this worked too before switching to Venus OS 3.5x and GUI 2.0.
Thank you very much! I will try that out independently.
The generator start/stop function for the ramp-down is a good approach! I haven’t used it yet because I don’t control the generator remotely and don’t plan to. Therefore i never considered it.
It´s partly due to my installation design - each AC in of the quattros has it´s own heavy-duty 4P contactor with mutual safety interlocks cause i´m a fan of redundancy. It also has a auto/manual/off setting with an option to select “grid first” or “gen. first” if both available as well as a manual source selection. Would surely be possible to integrate a generator remote-start-stop into all this but practically i don´t need it. Starting the generator and then pushing a button is more than good enough for me
But i have a free relay on the cerbo gx and i only need the ramp-down of the charging power - so it´s for sure worth a try. To test the ramp-down function, I´ve set gen. start-stop to manual, activated “detect generator on AC input” and i´ve se the “generator stop time” to 120 seconds to give me enough time to open the generator contactor after i initiate a pseudo “generator stop”.
If this does the trick then i´m more than happy
Will test this at first an seperately the OS v3.60 beta 11, as well as gui-v1.
