Solar Controller question

4aSong wrote:
The readout on my Viewstar VS1024BN Solar Controller has an item called State of Charge (SOC) and Voltage compensation (VC) can anyone explain these In simple terms. :h

Did you read This?

SOC shows how full is the battery. I wouldn't trust this reading, it's never accurate.

Voltage compensation is - I think - the temperature compensation coefficient. In other words, how much the voltage of set points will increase or decrease per 1 degree Celsius when temperature goes up or down from 25C. Refer to your battery manual to set the temp coefficient. If you are not sure, set it to 5mV/C per 2V cell, i.e. 0.03V/C per 12V battery.

There is no "safe percentage" for SOC. Normally, people are trying to keep it above 50% at all times. The lower it gets discharged, the shorter is battery life. On the higher end, you should try getting it to 96-98% every day. 90% is not good enough. If solar doesn't cut it, you need to add more solar or run a generator for 30-40 minutes in the morning and then solar would finish it off by the evening (hopefully). Or - reduce your energy consumption, so that the battery won't get too low by the morning and then solar will be able to get it to 98%.
But, like I said, you can't trust SOC readings on controller.