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m1kkel avatar image
m1kkel asked

Batrium + Victron + CerboGX- What is controlling my charge ramp down? (ESS)

Hoping someone can help. Ive been searching the web, forums etc. for a answer to my question.

Im charging my pack to 54.0 volts. When i hit that, at some point, the victorn system will add 0.4 volts to the 54.4 volt since im exporting excess solar to the grid.

However it will keep charging at 54,4 volt for some time, serveral hours at around 30-40 amp until my soc hits 100% in the batrium system (99% in victron) and finally it ramps down to 3 Amp.

My batrium remote target is set for 54.0 in normal/100AMP and 54.0 in limited, 1 amp. But when i hit 54,0V it keeps going and slowly ramps down to 30-40 amp, and when i hit soc 100 it will return to 3 amp. I dont understand why. DVCC is enabled, so i assume my MPPT charge values are ignored, aswell as my Multiplus-II values set in Veconfigure. So something else is controlling this ramp down effect.

To my understanding victron doesnt care about set Amp values when i use DVCC, it only cares about voltage, but what defines my absorption charge time then????

Hope someone can help. Im afraid im charging my battery to 100% and i dont want that.

Multiplus-IIcerbo gxBMSmppt rsbatrium
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Paul B avatar image
Paul B answered ·

once a batteries bms is connected to the system, and I am presuming that the batrium battery's bms has been connected when the system was setup, then all the charge control is being taken from that batteries bms system, as this is telling the victron what to charge, victron does not control the voltages or amps any more.

this only applies if the bms has been connected to the victron system.

I dont know this system so I have no idea if its connected or not.

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m1kkel avatar image m1kkel commented ·
Correct. Victron and Batrium is connected via canbus. Victron DVCC will only accept a CVL and thats it. (when ESS feed in excess is enabled). Victron does not care about set limits for Amps, it only listens to CVL.
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