red light low battery always on.
battery pack 13s3p of yuasa lev50n (max volt 4.1 and min volt 2,75 - 50 A)
REC Q BMS
min volt pack 2.75x13 =35,75 V
max volt pack 4.1x13=53.3 V
when not enough photovoltaic never works battery only the external grid as backup
ESS installed and all firmware ok
some help in ESS configuration