I´ve tested it now and have written a lot with a technician from Seplos:
The hardware and the functions are good and working for a really good price, but the software is bad.
Seplos is doing wrong thinks with the parameters and what they are doing with the CVL respectively how they interpret it is simply wrong.
There are four relevant parameters in the software which can set:
-Monomer high voltage alarm & protection (cell)
-Total high voltage alarm & protection (battery)
At "monomer high voltage alarm" the BMS sends a CCL of 10A - no control after that if that could be enough. If it is still to much the cell goes up to 3,65V (= monomer high voltage protection) and BMS cuts out - thats not a drama but also not the fine-way
At "total high voltage alarm" the BMS sends a CCL of 0A and is setting the SOC to 100% - so charging ends up here without gradual current reduction!
At "total high voltage protection" the BMS cuts out - BUT: They are sending THIS VALUE also as CVL to the Inverter!
So the goal for the inverter (=CVL) is the same value at which the BMS cuts out - but anyway it will never reach it because at "THV-alarm" he gets the signal CCL = 0A! That doesn´t make sense to me.
This regulation is really bad when you have a Victron-System because Victron can NOT react to the CCL when charging from the MPPTs/Solar (CCL has only a effect when charging from the grid with the Multiplus or when grid feed-in is disabled)! So whats happening at Victron:
When a single cell-voltage is getting too high the BMS can only act when it reaches the protection-value (3,65) - cut out!
Because CCL is "disabled" the inverter charges up to CVL (= protection-value!) and would then go down with the current step by step - he would but its not possible because - cut out! ?
So what´s left for me: A stupid BMS with a better SOC-calibration (compared to a BMS without communication and no installed BMV), a Display where i can see the cell voltages and a software with the function to record data in liftime...
I hope this whole thing applies only to me and my BMS, otherwise i cannot understand why I´m the only one who´s criticizing this ?
(REC for example is doing it perfect - but it´s so expensive :/ )