Hi , this is getting very annoying now, second year in a row. Two 48/100/70 in parallel , running a few campsite plugins, during summer and full light in uk no problems with judging battery soc and voltage, however at this time of year the soc is completely out, the batterrry voltage shutdown is happening at weird times and nothing makes sense with battery voltage , I have to carefully manage soc , battery vilatage and generator starts to save the system. Why is soc not calculating the actual system soc? I looked at a chart and it was 50 percent out, of a standard 12v x4 battery bank average soc.. any ideas ??