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mlsadler avatar image
mlsadler asked

BMS managed solar system

Am puzzled, I use WECO lithium batteries 5K3 I managed to set up my system and its controlled by the battery BMS through the color control gx, what have noticed once the batteries get fully charged at SOC 100% the BMS turns off the MPPT and the batteries start discharging to cater for the loads and when the SOC is back to 98% they then start charging again, I would have rather expected that the BMS only cuts off its charging and lets the MPPT provide solar for the loads keeping the batteries at 100% SOC, how can I achieve this ?

BMS
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shaneyake avatar image shaneyake commented ·

That is typically how these systems work, go to 100% and hold. Is the battery connected via CAN? Can you see in VRM what the BMS charge voltage and charge currents go to? Will be in the advanced tab, under battery monitor widget. It might be that the BMS is completely disabling charge.

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mlsadler avatar image mlsadler shaneyake commented ·
Yes the battery is connected via CAN, yes the BMS completely disables charging coz the voltage stays constant at 53.2V while charge current is 0. What i expected was atleast allowing a pass through current for running loads instead of discharging the batteries
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Paul B avatar image
Paul B answered ·

answered via comments above

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