I have a Flexboss21 and (2) EG4 batteries. I recently set the batteries to keep the batteries at 85% SOC normally as I only use the batteries for power back up. The batteries now are discharging about 1 amp, but each separately at different times. I just set the SOC to 90% and the inverter started charging the batteries, however I noticed that the batteries both have a different s SOC---the master battery is 89% now but the slave battery is at 83%. Doesn't seem like my system is working correctly. Any thoughts?