R7 and C1 provide some time delay for the ON adjustment when the monitored voltage abruptly changes. Similarly R8 and C2 provide a time delay for the OFF setpoint for abrupt changes in the monitored voltage. These components have little effect on gradual changes in the monitored voltage but the time delay from abrupt changes depends on the amount of change and how far below the OFF setpoint the lower voltage is. The OFF time delay is about 5 times the ON delay. Since any leakage current in capacitors C1 and C2 will upset the setpoints, they are chosen for minimum leakage.